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469 relations: Aardwolf, Addax, Advertising in biology, African civet, African forest elephant, African wild dog, Alpaca, Alpine ibex, Altrenogest, Amazing Thrills! in 3-Dimension, American bison, American marten, American pika, American red squirrel, Amphion (horse), Amur leopard, Androstenone, Animal sexual behaviour, Anol, Antarctic fur seal, Aplastic anemia, Appalachian cottontail, Arctique Royale, Argali, Artificial insemination, Asian golden cat, Asobi ni Iku yo!, Australian sea lion, Australostichopus, Bachelor herd, Basenji, Bateman's principle, Bay duiker, Bear, Beech marten, Beef hormone controversy, Beluga whale, Ben Blackwell, Bengal slow loris, Bertold Wiesner, Big Cat Diary, Binturong, Black Allan (horse), Black bonneted bat, Black wildebeest, Black-footed cat, Black-footed ferret, Blue duiker, Blue wildebeest, Boar taint, ..., Bob Back, Bobcat, Boer goat, Bonda mastiff bat, Bonobo, Bottlenose dolphin, Bovidae, Bovine campylobacteriosis, Brazilian gracile opossum, Brown four-eyed opossum, Brown hyena, Brown-eared woolly opossum, Bruce effect, Brush-tailed mulgara, Bulling (cattle), Buru babirusa, Bush dog, Calabar angwantibo, Calendar-based contraceptive methods, California mule deer, Camel wrestling, Canada lynx, Canine reproduction, Canis, Cape ground squirrel, Cape porcupine, Captive breeding, Capybara, Caracal, Carolina anole, Carolina Dog, Cat, Cat communication, Cat Orgy, Catamenial epilepsy, Central American squirrel monkey, Central Sheep and Wool Research Institute, Challenge hypothesis, Cheetah, Chital, Claire Wathes, CLOCK, Cloprostenol, Clouded leopard, Common chimpanzee, Common eland, Common kusimanse, Common planigale, Common treeshrew, Common vampire bat, Concealed ovulation, Continuous breeder, Controlled internal drug release, Coolidge effect, Corpus luteum, Cougar, Coumestrol, Coyote, Crabeater seal, Crossarchus, Crowned sifaka, Cryoconservation of animal genetic resources, Cuban fig-eating bat, Cuban flower bat, Dairy cattle, Dairy 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community, Killer whale, Koala, Kultarr, Laboratory mouse, Laboratory Syrian hamster, Lap dance, Least chipmunk, Lee–Boot effect, Lemur, Leopard, Leopard cat, Lesser kudu, Lion, List of dog diseases, List of MeSH codes (G08), List of Prehistoric Park episodes, List of words that may be spelled with a ligature, Long-footed potoroo, Long-tongued nectar bat, Lordosis behavior, Luteal phase, Luteolysis, Lyudmila Trut, Major urinary proteins, Mammal, Mammalian reproduction, Mammary gland, Mammary tumor, Mandrill, Mannose receptor, Mantled howler, Marco Polo sheep, Mare, Margay, Marsh rice rat, Marwell (horse), Masked palm civet, Masoala fork-marked lemur, Massese sheep, Mate guarding in humans, Mating system, Max Guevara, Mecca's Angel, Melatonin, Membrane androgen receptor, Membrane progesterone receptor, Menstrual synchrony, Menstruation, Menstruation (mammal), Metallibure, Mexican deer mouse, Mexican free-tailed bat, Mibolerone, Mimicry, Mona ground iguana, Mongolian gerbil, Montane vole, Mountain goat, Mountain nyala, Mountain tapir, Mountain treeshrew, Mouse, Mule, Mule deer, Musth, Neuroplasticity, Neutering, New Guinea singing dog, Nile lechwe, Nilgai, Norgestomet, North American river otter, Northern tamandua, Oestrus ovis, Okapi, Olympic marmot, Oncilla, Oogenesis, Opportunistic breeder, Oribi, Osman Hill's mangabey, Ovandrotone albumin, Ovulatory shift hypothesis, Pallas's cat, Pallid bat, Pampas fox, Panamint kangaroo rat, Panthera hybrid, Parasitic flies of domestic animals, Patagonian mara, Pebbles (horse), Perception of infrasound, Pheromone, Philippine tarsier, Phoca, Phytoestrogens, Pig farming, Pinniped, Plains zebra, Polygyny in animals, Polymeric immunoglobulin receptor, Polynesian rat, Pon farr, Pony ride, Prairie dog, Predator (fictional species), Preseli (horse), Presenting, Princess Pati, Progesterone devices used in farm animals, Progesterone-releasing intravaginal device, Progestogen, Proligestone, Prostaglandin F receptor, Pseudopregnancy, Puppy mill, Pygmy goat, Pygmy hippopotamus, Pygmy slow loris, Pyometra, Q fever, Quintaglio Ascension Trilogy, Raccoon dog, Rebelline, Red fox, Red river hog, Red-flanked duiker, Relapse, Richard Castle, Richard Despard Estes, Riddelliine, Ring-tailed lemur, Roadkill, Roadrunner, Ruffed lemur, Rusty-spotted cat, Rut (mammalian reproduction), Sable, Sambar deer, Sand cat, Sanedtki, Sarah Blaffer Hrdy, Sciaenidae, Scimitar oryx, Scrub hare, Sea otter, Season (disambiguation), Seasonal breeder, Selmar Aschheim, Semelparity and iteroparity, Serval, Sexual intercourse, Sexual reproduction, Sexual suggestiveness, Sexual swelling, Sexuality in ancient Rome, Sexually dimorphic nucleus, Sheep, Sheep farming, Sheep milk, Signorinetta, Silver fox (animal), Sirenia, Slender mongoose, Slow loris, Snow leopard, Snuppy, Social grooming, Social monogamy in mammalian species, South American coati, South American sea lion, South Park (season 3), Southern tamandua, Spotted hyena, Springbok, Stallion, Steenbok, Steppe polecat, Stop Dragging Me Down, Striped skunk, Sugar glider, Sumatran rhinoceros, Sunda slow loris, Superfetation, Svaðilfari, Swamp rabbit, Swamp wallaby, Sweet Catomine, Syrian hamster breeding, Syrian hamster care, Tammar wallaby, Tapir, Tasmanian devil, Tayra, Telomian, Testicle, The Evolution of Human Sexuality, The Panther (horse), The Race (Worldwar), The Trench (novel), The White Bone, Three-toed sloth, Tibetan kyi apso, Tibetan Mastiff, Tiger, Tim Kerr (musician), Tragelaphini, Twilight at the Well of Souls, Two Dozen and One Greyhounds, Uinta ground squirrel, Ultime grida dalla savana, Uterus, Vaginal cytology, Vandenbergh effect, Wagner's mustached bat, Walrus, Water buffalo, Water deer, Waterbuck, West Indian manatee, Western jumping mouse, White-tailed deer, Whitten effect, Wild boar, Wildcat, Wildebeest, Wildlife of the Central African Republic, Wolfdog, Wrinkle-faced bat, Yellow-pine chipmunk, Yellow-throated marten, Zanzibar red colobus. Expand index (419 more) »
Aardwolf
The aardwolf (Proteles cristata) is a small, insectivorous mammal, native to East and Southern Africa.
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Addax
The addax (Addax nasomaculatus), also known as the white antelope and the screwhorn antelope, is an antelope of the genus Addax, that lives in the Sahara desert.
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Advertising in biology
Advertising in biology means the use of displays by organisms such as animals and plants to signal their presence for some evolutionary reason.
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African civet
The African civet (Civettictis civetta) is the largest representative of the African Viverridae and the sole member of its genus.
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African forest elephant
The African forest elephant (Loxodonta cyclotis) is a forest-dwelling species of elephant found in the Congo Basin.
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African wild dog
The African wild dog (Lycaon pictus), also known as African hunting dog, African painted dog, painted hunting dog, or painted wolf, is a canid native to Sub-Saharan Africa.
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Alpaca
The Alpaca (Vicugna pacos) is a species of South American camelid, similar to, and often confused with the llama.
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Alpine ibex
The Alpine ibex (Capra ibex), also known as the steinbock, bouquetin, or simply ibex, is a species of wild goat that lives in the mountains of the European Alps.
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Altrenogest
Altrenogest, sold under the brand names Regumate and Matrix, is a progestin of the 19-nortestosterone group which is widely used in veterinary medicine to suppress or synchronize estrus in horses and pigs.
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Amazing Thrills! in 3-Dimension
Amazing Thrills! in 3-Dimension is a Man or Astro-man? promo 7" that was given away with the first 1,000 copies of their debut album, Is It... Man or Astroman?.
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American bison
The American bison or simply bison (Bison bison), also commonly known as the American buffalo or simply buffalo, is a North American species of bison that once roamed the grasslands of North America in massive herds.
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American marten
The American marten or American pine marten (Martes americana) is a North American member of the family Mustelidae, sometimes referred to as the pine marten.
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American pika
The American pika (Ochotona princeps), a diurnal species of pika, is found in the mountains of western North America, usually in boulder fields at or above the tree line.
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American red squirrel
The American red squirrel (Tamiasciurus hudsonicus) is one of three species of tree squirrels currently classified in the genus Tamiasciurus, known as the pine squirrels (the others are the Douglas squirrel, T. douglasii, and Mearns's squirrel, T. mearnsi).
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Amphion (horse)
Amphion (1886 – 30 October 1906) was a British Thoroughbred racehorse.
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Amur leopard
The Amur leopard (Panthera pardus orientalis) is a leopard subspecies native to the Primorye region of southeastern Russia and the Jilin Province of northeast China.
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Androstenone
No description.
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Animal sexual behaviour
Animal sexual behaviour takes many different forms, including within the same species.
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Anol
Anol, also known as para-hydroxypropenylbenzene, is a simple phenol that was derived via demethylation from anethole, an estrogenic constituent of anise and fennel, by Sir Charles Dodds in 1937.
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Antarctic fur seal
The Antarctic fur seal, sometimes called the Kerguelen fur seal (Arctocephalus gazella), is one of eight seals in the genus Arctocephalus, and one of nine fur seals in the subfamily Arctocephalinae.
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Aplastic anemia
Aplastic anaemia is a rare disease in which the bone marrow and the hematopoietic stem cells that reside there are damaged.
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Appalachian cottontail
The Appalachian cottontail (Sylvilagus obscurus) is a species of cottontail rabbit in the family Leporidae.
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Arctique Royale
Arctique Royale (22 April 1978 – 2000) was an Irish Thoroughbred racehorse and broodmare.
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Argali
The argali, or the mountain sheep (species Ovis ammon) is a wild sheep that roams the highlands of Central Asia (Himalaya, Tibet, Altay).
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Artificial insemination
Artificial insemination (AI) is the deliberate introduction of sperm into a female's uterus or cervix for the purpose of achieving a pregnancy through in vivo fertilization by means other than sexual intercourse.
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Asian golden cat
The Asian golden cat (Catopuma temminckii, syn. Pardofelis temminckii), also called the Asiatic golden cat and Temminck's cat, is a medium-sized wild cat of the northeastern Indian subcontinent and Southeast Asia.
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Asobi ni Iku yo!
is a Japanese light novel series by Okina Kamino with illustrations by Hōden Eizō and Nishieda.
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Australian sea lion
The Australian sea lion (Neophoca cinerea) also known as the Australian sea-lion or Australian sealion, is a species of sea lion that is the only endemic pinniped in Australia.
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Australostichopus
Australostichopus mollis, formerly Stichopus mollis,Moraes,G., Norhcote, P.C., Kalinin,V.I.,Avilov, S.A., Silchenko,A.S., Dmitrenok, P.S. 2004.
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Bachelor herd
A bachelor herd is a herd of (usually) juvenile male animals who are still sexually immature or 'harem'-forming animals who have been thrown out of their parent groups but not yet formed a new family group.
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Basenji
The Basenji is a breed of hunting dog.
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Bateman's principle
Bateman's principle, in evolutionary biology, is that in most species, variability in reproductive success (or reproductive variance) is greater in males than in females.
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Bay duiker
The bay duiker (Cephalophus dorsalis), also known as the black-striped duiker and the black-backed duiker, is a forest-dwelling duiker native to western and southern Africa.
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Bear
Bears are carnivoran mammals of the family Ursidae.
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Beech marten
The beech marten (Martes foina), also known as the stone marten, house marten or white breasted marten, is a species of marten native to much of Europe and Central Asia, though it has established a feral population in North America.
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Beef hormone controversy
The Beef Hormone Dispute is one of the most intractable agricultural controversies since the establishment of the World Trade Organization.
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Beluga whale
The beluga whale or white whale (Delphinapterus leucas) is an Arctic and sub-Arctic cetacean.
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Ben Blackwell
Ben Blackwell (Born Benjamin Jesse Blackwell on June 12, 1982) is the creator and director of Cass Records, one of two drummers in the Detroit-based rock band the Dirtbombs, a music writer, and a vinyl record collector.
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Bengal slow loris
The Bengal slow loris (Nycticebus bengalensis) or northern slow loris is a strepsirrhine primate and a species of slow loris native to the Indian subcontinent and Indochina.
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Bertold Wiesner
Bertold Paul Wiesner (1901–1972) was an Austrian Jewish physiologist noted firstly for coining the term 'Psi' to denote parapsychological phenomena; secondly for his contribution to research into human fertility and the diagnosis of pregnancy; and thirdly for being biological father to an estimated 600 offspring by anonymously donating sperm used by his wife the obstetrician Mary Barton to perform artificial insemination on women at a private clinic on Harley Street, London, England.
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Big Cat Diary
Big Cat Diary, also known as Big Cat Week or Big Cat Live according to the format of the show, was a long-running nature documentary series on BBC television which follows the lives of African big cats in Kenya's Maasai Mara.
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Binturong
The binturong (Arctictis binturong), also known as bearcat, is a viverrid native to South and Southeast Asia.
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Black Allan (horse)
Black Allan or Allan F-1 (18861910) was the foundation sire of the Tennessee Walking Horse.
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Black bonneted bat
The black bonneted bat, also known as Shaw's mastiff bat, (Eumops auripendulus), is a species of bat from the Americas.
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Black wildebeest
The black wildebeest or white-tailed gnu (Connochaetes gnou) is one of the two closely related wildebeest species.
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Black-footed cat
The black-footed cat (Felis nigripes), also called small-spotted cat, is the smallest African cat and endemic to the southwestern arid zone of Southern Africa.
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Black-footed ferret
The black-footed ferret (Mustela nigripes), also known as the American polecatHeptner, V. G. (Vladimir Georgievich); Nasimovich, A. A; Bannikov, Andrei Grigorevich; Hoffmann, Robert S. (2001).
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Blue duiker
The blue duiker (Philantomba monticola) is a small antelope found in western, southern and eastern Africa.
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Blue wildebeest
The blue wildebeest (Connochaetes taurinus), also called the common wildebeest, white-bearded wildebeest or brindled gnu, is a large antelope and one of the two species of wildebeest.
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Boar taint
Boar taint is the offensive odor or taste that can be evident during the cooking or eating of pork or pork products derived from non-castrated male pigs once they reach puberty.
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Bob Back
Bob Back (26 May 1981 – January 2011) was an American-bred, British-trained Thoroughbred racehorse and sire.
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Bobcat
The bobcat (Lynx rufus) is a North American cat that appeared during the Irvingtonian stage of around 1.8 million years ago (AEO).
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Boer goat
The Boer goat is a breed of goat that was developed in South Africa in the early 1900s for meat production.
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Bonda mastiff bat
The Bonda mastiff bat or Thomas's mastiff bat (Molossus currentium), is a species of mastiff bat from South and Central America.
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Bonobo
The bonobo (Pan paniscus), formerly called the pygmy chimpanzee and less often, the dwarf or gracile chimpanzee, is an endangered great ape and one of the two species making up the genus Pan; the other is Pan troglodytes, or the common chimpanzee.
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Bottlenose dolphin
Bottlenose dolphins, the genus Tursiops, are the most common members of the family Delphinidae, the family of oceanic dolphin.
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Bovidae
The Bovidae are the biological family of cloven-hoofed, ruminant mammals that includes bison, African buffalo, water buffalo, antelopes, wildebeest, impala, gazelles, sheep, goats, muskoxen, and domestic cattle.
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Bovine campylobacteriosis
Gastrointestinal campylobacteriosis is caused by Campylobacter jejuni or Campylobacter coli.
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Brazilian gracile opossum
The Brazilian gracile opossum (Gracilinanus microtarsus) is a species of small opossum from Brazil.
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Brown four-eyed opossum
The brown four-eyed opossum (Metachirus nudicaudatus) is a pouchless marsupial of the family Didelphidae.
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Brown hyena
The brown hyena (Hyaena brunnea, formerly Parahyaena brunnea), also called strandwolf, is a species of hyena found in Namibia, Botswana, western and southern Zimbabwe, southern Mozambique and South Africa.
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Brown-eared woolly opossum
The brown-eared woolly opossum (Caluromys lanatus), also known as the western woolly opossum, is an opossum from South America.
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Bruce effect
The Bruce effect, or pregnancy block, is the tendency for female rodents to terminate their pregnancies following exposure to the scent of an unfamiliar male.
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Brush-tailed mulgara
The brush-tailed mulgara (Dasycercus blythi or Dasycercus hillieri) is a large carnivorous Australian marsupial species.
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Bulling (cattle)
Bulling is a behaviour seen in cattle when one mounts another, usually when one or the other is a female in oestrus (on heat); "bulling" is commonly used as a term for a female in oestrus.
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Buru babirusa
The Buru babirusa (Babyrousa babyrussa), also known as the Moluccan babirusa, golden babirusa or hairy babirusa, is a wild pig-like animal native to the island of Buru and the two Sula Islands of Mangole and Taliabu, all belonging to Indonesia.
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Bush dog
The bush dog (Speothos venaticus) is a canid found in Central and South America.
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Calabar angwantibo
The Calabar angwantibo (Arctocebus calabarensis), also known as the Calabar potto, is a strepsirrhine primate of the family Lorisidae.
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Calendar-based contraceptive methods
Calendar-based methods are various methods of estimating a woman's likelihood of fertility, based on a record of the length of previous menstrual cycles.
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California mule deer
The California mule deer (Odocoileus hemionus californicus) is a subspecies of mule deer whose range covers much of the state of California.
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Camel wrestling
Camel wrestling (Turkish deve güreşi) is a sport in which two male Tülü camels wrestle, typically in response to a female camel in heat being led before them.
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Canada lynx
The Canada lynx (Lynx canadensis) or Canadian lynx is a North American mammal of the cat family, Felidae.
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Canine reproduction
Canine reproduction is the process of sexual reproduction in domestic dogs.
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Canis
Canis is a genus of the Canidae containing multiple extant species, such as wolves, coyotes, jackals, dingoes, and dogs.
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Cape ground squirrel
The Cape ground squirrel (Xerus inauris) is found in most of the drier parts of southern Africa from South Africa, through to Botswana, and into Namibia, including Etosha National Park.
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Cape porcupine
The Cape porcupine or South African porcupine, (Hystrix africaeaustralis), is a species of Old World porcupine native to central and southern Africa.
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Captive breeding
Captive breeding is the process of maintaining plants or animals in controlled environments, such as wildlife reserves, zoos, botanic gardens, and other conservation facilities.
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Capybara
The capybara (Hydrochoerus hydrochaeris) is a mammal native to South America.
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Caracal
The caracal (Caracal caracal) is a medium-sized wild cat native to Africa, the Middle East, Central Asia, and India.
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Carolina anole
The Carolina anole (Anolis carolinensis) is an arboreal anole lizard native to the southeastern United States (west to Texas) and introduced elsewhere.
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Carolina Dog
The Carolina dog is a landrace of medium-sized, feral dog that lives mostly in the Southeastern United States, especially in isolated stretches of longleaf pines and cypress swamps.
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Cat
The domestic cat (Felis silvestris catus or Felis catus) is a small, typically furry, carnivorous mammal.
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Cat communication
Cat communication is the transfer of information by one or more cats that has an effect on the current or future behaviour of another animal, including humans.
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Cat Orgy
"Cat Orgy" is the seventh episode of the third season of the American animated sitcom South Park, and the 38th episode of the series overall.
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Catamenial epilepsy
Epilepsy is a chronic neurological condition characterized by recurrent seizures.
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Central American squirrel monkey
The Central American squirrel monkey or (Saimiri oerstedii), also known as red-backed squirrel monkey, is a squirrel monkey species from the Pacific coast of Costa Rica and Panama.
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Central Sheep and Wool Research Institute
The ICAR-Central Sheep and Wool Research Institute (ICAR-CSWRI) is an Indian Council of Agricultural Research subsidiary commissioned for research, training and extension activities related to sheep and rabbits.
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Challenge hypothesis
The challenge hypothesis outlines the dynamic relationship between testosterone and aggression in mating contexts.
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Cheetah
List |F. jubata Erxleben, 1777 |F. jubatus Schreber, 1775 |Felis guttata Hermann, 1804 |F. venatica Griffith, 1821 |Acinonyx venator Brookes, 1828 |F. fearonii Smith, 1834 |F. megaballa Heuglin, 1868 |C. jubatus Blanford, 1888 |Cynælurus jubata Mivart, 1900 |C. guttatus Hollister, 1911 --> The cheetah (Acinonyx jubatus) is a large cat of the subfamily Felinae that occurs in Southern, North and East Africa, and a few localities in Iran. The species is IUCN Red Listed as vulnerable, as it suffered a substantial decline in its historic range in the 20th century due to habitat loss, poaching, illegal pet trade, and conflict with humans. By 2016, the global cheetah population has been estimated at approximately 7,100 individuals in the wild. Several African countries have taken steps to improve cheetah conservation measures. It is the fastest land animal. The only extant member of the genus Acinonyx, the cheetah was formally described by Johann Christian Daniel von Schreber in 1775. The cheetah is characterised by a slender body, deep chest, spotted coat, small rounded head, black tear-like streaks on the face, long thin legs and long spotted tail. Its lightly built, slender form is in sharp contrast with the robust build of the big cats, making it more similar to the cougar. The cheetah reaches nearly at the shoulder, and weighs. Though taller than the leopard, it is notably smaller than the lion. Typically yellowish tan or rufous to greyish white, the coat is uniformly covered with nearly 2,000 solid black spots. Cheetahs are active mainly during the day, with hunting their major activity. Adult males are sociable despite their territoriality, forming groups called coalitions. Females are not territorial; they may be solitary or live with their offspring in home ranges. Carnivores, cheetah mainly prey upon antelopes and gazelles. They will stalk their prey to within, charge towards it and kill it by tripping it during the chase and biting its throat to suffocate it to death. Cheetahs can reach speeds of in short bursts, but this is disputed by more recent measurements. The average speed of cheetahs is about. Cheetahs are induced ovulators, breeding throughout the year. Gestation is nearly three months long, resulting in a litter of typically three to five cubs (the number can vary from one to eight). Weaning occurs at six months; siblings tend to stay together for some time. Cheetah cubs face higher mortality than most other mammals, especially in the Serengeti region. Cheetahs inhabit a variety of habitatsdry forests, scrub forests and savannahs. Because of its prowess at hunting, the cheetah was tamed and used to kill game at hunts in the past. The animal has been widely depicted in art, literature, advertising and animation.
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Chital
The chital or cheetal (Axis axis), also known as spotted deer or axis deer, is a species of deer that is native in the Indian subcontinent.
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Claire Wathes
(Dorothy) Claire Wathes née Bulman (born 1953) is a British veterinary researcher who studies the reproduction of farm animals.
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CLOCK
Clock (Circadian Locomotor Output Cycles Kaput) is a gene encoding a basic helix-loop-helix-PAS transcription factor (CLOCK) that is believed to affect both the persistence and period of circadian rhythms.
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Cloprostenol
Cloprostenol is a synthetic analogue of prostoglandin F2α (PGF2α).
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Clouded leopard
The clouded leopard (Neofelis nebulosa) is a wild cat occurring from the Himalayan foothills through mainland Southeast Asia into China.
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Common chimpanzee
The common chimpanzee (Pan troglodytes), also known as the robust chimpanzee, is a species of great ape.
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Common eland
The common eland (Taurotragus oryx), also known as the southern eland or eland antelope, is a savannah and plains antelope found in East and Southern Africa.
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Common kusimanse
The common kusimanse (Crossarchus obscurus), also known as the long-nosed kusimanse or cusimanse, is a small, diurnal kusimanse or dwarf mongoose.
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Common planigale
The common planigale (Planigale maculata), also known as the pygmy planigale or the coastal planigale, is one of many small marsupial carnivores known as "marsupial mice" found in Australia.
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Common treeshrew
The common treeshrew (Tupaia glis) is a small mammal in the treeshrew family Tupaiidae, and is native to Thailand, Malaysia, and Indonesia.
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Common vampire bat
The common vampire bat (Desmodus rotundus) is a small, leaf-nosed bat native to the Americas.
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Concealed ovulation
Concealed ovulation or hidden estrus in a species is the lack of any perceptible change in an adult female (for instance, a change in appearance or scent) when she is "in heat" and near ovulation.
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Continuous breeder
Continuous breeders are animal species that can breed or mate throughout the year.
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Controlled internal drug release
Controlled internal drug release (CIDR) devices are used in livestock for the synchronization of estrus.
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Coolidge effect
The Coolidge effect (also known as the Clinton effect) is a biological phenomenon seen in animals, whereby males (and to a lesser extent females) exhibit renewed sexual interest whenever a new female is introduced to have sex with, even after cessation of sex with prior but still available sexual partners.
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Corpus luteum
The corpus luteum (Latin for "yellow body"; plural corpora lutea) is a temporary endocrine structure in female ovaries and is involved in the production of relatively high levels of progesterone, moderate levels of estradiol, inhibin A and small amounts of estrogen.
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Cougar
The cougar (Puma concolor), also commonly known as the mountain lion, puma, panther, or catamount, is a large felid of the subfamily Felinae native to the Americas.
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Coumestrol
Coumestrol is a natural organic compound in the class of phytochemicals known as coumestans.
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Coyote
The coyote (Canis latrans); from Nahuatl) is a canine native to North America. It is smaller than its close relative, the gray wolf, and slightly smaller than the closely related eastern wolf and red wolf. It fills much of the same ecological niche as the golden jackal does in Eurasia, though it is larger and more predatory, and is sometimes called the American jackal by zoologists. The coyote is listed as least concern by the International Union for Conservation of Nature due to its wide distribution and abundance throughout North America, southwards through Mexico, and into Central America. The species is versatile, able to adapt to and expand into environments modified by humans. It is enlarging its range, with coyotes moving into urban areas in the Eastern U.S., and was sighted in eastern Panama (across the Panama Canal from their home range) for the first time in 2013., 19 coyote subspecies are recognized. The average male weighs and the average female. Their fur color is predominantly light gray and red or fulvous interspersed with black and white, though it varies somewhat with geography. It is highly flexible in social organization, living either in a family unit or in loosely knit packs of unrelated individuals. It has a varied diet consisting primarily of animal meat, including deer, rabbits, hares, rodents, birds, reptiles, amphibians, fish, and invertebrates, though it may also eat fruits and vegetables on occasion. Its characteristic vocalization is a howl made by solitary individuals. Humans are the coyote's greatest threat, followed by cougars and gray wolves. In spite of this, coyotes sometimes mate with gray, eastern, or red wolves, producing "coywolf" hybrids. In the northeastern United States and eastern Canada, the eastern coyote (a larger subspecies, though still smaller than wolves) is the result of various historical and recent matings with various types of wolves. Genetic studies show that most North American wolves contain some level of coyote DNA. The coyote is a prominent character in Native American folklore, mainly in the Southwestern United States and Mexico, usually depicted as a trickster that alternately assumes the form of an actual coyote or a man. As with other trickster figures, the coyote uses deception and humor to rebel against social conventions. The animal was especially respected in Mesoamerican cosmology as a symbol of military might. After the European colonization of the Americas, it was reviled in Anglo-American culture as a cowardly and untrustworthy animal. Unlike wolves (gray, eastern, or red), which have undergone an improvement of their public image, attitudes towards the coyote remain largely negative.
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Crabeater seal
The crabeater seal (Lobodon carcinophaga) is a true seal with a circumpolar distribution around the coast of Antarctica.
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Crossarchus
Crossarchus is a genus of mongoose, commonly referred to as kusimanse (often cusimanse), mangue, or dwarf mongoose.
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Crowned sifaka
The crowned sifaka (Propithecus coronatus) is a sifaka endemic to western Madagascar.
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Cryoconservation of animal genetic resources
Cryoconservation of animal genetic resources is a strategy wherein samples of animal genetic materials are preserved cryogenically.
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Cuban fig-eating bat
The Cuban fig-eating bat, or white-shouldered bat, (Phyllops falcatus) is a species of bat in the family Phyllostomidae, found only in the Caribbean.
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Cuban flower bat
The Cuban flower bat (Phyllonycteris poeyi), also called Poey's flower bat, is a species of bat in the family Phyllostomidae.
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Dairy cattle
Dairy cattle (also called dairy cows) are cattle cows bred for the ability to produce large quantities of milk, from which dairy products are made.
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Dairy farming
Dairy farming is a class of agriculture for long-term production of milk, which is processed (either on the farm or at a dairy plant, either of which may be called a dairy) for eventual sale of a dairy product.
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Dan Cunneen
Dan Cunneen is a drummer, songwriter, disc jockey, screen printer and graphic designer originally from Portland, Oregon, United States.
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Deception in animals
Deception in animals is the transmission of misinformation by one animal to another, of the same or different species, in a way that propagates beliefs that are not true.
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Decidua
The decidua is the uterine lining (endometrium) during a pregnancy, which forms the maternal part of the placenta.
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Decidualization
Decidualization is a process that results in significant changes to cells of the endometrium in preparation for, and during, pregnancy.
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Derby's woolly opossum
Derby's woolly opossum (Caluromys derbianus), or the Central American woolly opossum, is an opossum found in deciduous and moist evergreen forests of Central America, from southern Mexico to western Ecuador and Colombia.
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Desert pupfish
The desert pupfish (Cyprinodon macularius) is a rare species of bony fish in the family Cyprinodontidae.
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Desert rat-kangaroo
The desert rat-kangaroo (Caloprymnus campestris), also called the buff-nosed rat-kangaroo, plains rat-kangaroo or oolacunta,Tony Robinson & Tiana Forrest (2012) The South Australian Naturalist, 86(2) Jul-Dec 2012.
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Desert warthog
The desert warthog (Phacochoerus aethiopicus) is a species of even-toed ungulate in the pig family (Suidae), found in northern Kenya and Somalia, and possibly Djibouti, Eritrea, and Ethiopia.
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Diademed sifaka
The diademed sifaka (Propithecus diadema), or diademed simpona, is an endangered species of sifaka, one of the lemurs endemic to certain rainforests in eastern Madagascar.
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Dingo
The dingo (Canis familiaris or Canis familiaris dingo or Canis lupus dingo or Canis dingo) is a type of feral dog native to Australia.
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Djungarian hamster
The Djungarian hamster (Phodopus sungorus), also known as the Dzungarian hamster, striped dwarf hamster, Siberian hamster, Siberian dwarf hamster or Russian winter white dwarf hamster, is one of three species of hamster in the genus Phodopus.
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DMBQ
DMBQ is a Japanese rock band from Tokyo, whose name stands for Dynamite Masters Blues Quartet.
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Dog
The domestic dog (Canis lupus familiaris when considered a subspecies of the gray wolf or Canis familiaris when considered a distinct species) is a member of the genus Canis (canines), which forms part of the wolf-like canids, and is the most widely abundant terrestrial carnivore.
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Dog behavior
Dog behavior is the internally coordinated responses of individuals or groups of domestic dogs to internal and external stimuli.
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Dog health
The health of dogs is a well studied area in veterinary medicine.
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Domestic pig
The domestic pig (Sus scrofa domesticus or only Sus domesticus), often called swine, hog, or simply pig when there is no need to distinguish it from other pigs, is a large, even-toed ungulate.
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Domestic sheep reproduction
As with other mammals, domestic sheep reproduction occurs sexually.
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Domestic yak
The domestic yak (Bos grunniens) is a long-haired domesticated bovid found throughout the Himalayan region of the Indian subcontinent, the Tibetan Plateau and as far north as Mongolia and Russia.
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Domesticated red fox
The domesticated red fox, domesticated silver fox or just simply domesticated fox (Vulpes vulpes forma amicus) is a form of the wild red fox (Vulpes vulpes) which has been domesticated to an extent, under laboratory conditions.
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Donkey
The donkey or ass (Equus africanus asinus) is a domesticated member of the horse family, Equidae.
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Dragons (Pern)
The Dragons of Pern are a fictional race created by Anne McCaffrey as an integral part of the science fiction world depicted in her Dragonriders of Pern novels.
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Dromedary
The dromedary, also called the Arabian camel (Camelus dromedarius), is a large, even-toed ungulate with one hump on its back.
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Dugong
The dugong (Dugong dugon) is a medium-sized marine mammal.
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Eastern grey kangaroo
The eastern grey kangaroo (Macropus giganteus) is a marsupial found in southern and eastern Australia, with a population of several million.
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Eastern quoll
The eastern quoll (Dasyurus viverrinus), formerly known as the eastern native cat, is a medium-sized carnivorous dasyurid marsupial native to Australia.
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Elephant
Elephants are large mammals of the family Elephantidae and the order Proboscidea.
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Elizabeth Gould (psychologist)
Elizabeth Gould is an American neuroscientist and professor of psychology at Princeton University's Department of Psychology.
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Elk
The elk or wapiti (Cervus canadensis) is one of the largest species within the deer family, Cervidae, in the world, and one of the largest land mammals in North America and Eastern Asia.
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Elk farming
Elk farming is an agricultural industry for the production of elk as livestock or for the sport of hunting.
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Endometrium
The endometrium is the inner epithelial layer, along with its mucous membrane, of the mammalian uterus.
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Eosinophil
Eosinophils sometimes called eosinophiles or, less commonly, acidophils, are a variety of white blood cells and one of the immune system components responsible for combating multicellular parasites and certain infections in vertebrates. Along with mast cells and basophils, they also control mechanisms associated with allergy and asthma. They are granulocytes that develop during hematopoiesis in the bone marrow before migrating into blood, after which they are terminally differentiated and do not multiply. These cells are eosinophilic or "acid-loving" due to their large acidophilic cytoplasmic granules, which show their affinity for acids by their affinity to coal tar dyes: Normally transparent, it is this affinity that causes them to appear brick-red after staining with eosin, a red dye, using the Romanowsky method. The staining is concentrated in small granules within the cellular cytoplasm, which contain many chemical mediators, such as eosinophil peroxidase, ribonuclease (RNase), deoxyribonucleases (DNase), lipase, plasminogen, and major basic protein. These mediators are released by a process called degranulation following activation of the eosinophil, and are toxic to both parasite and host tissues. In normal individuals, eosinophils make up about 1–3% of white blood cells, and are about 12–17 micrometres in size with bilobed nuclei. While they are released into the bloodstream as neutrophils are, eosinophils reside in tissue They are found in the medulla and the junction between the cortex and medulla of the thymus, and, in the lower gastrointestinal tract, ovary, uterus, spleen, and lymph nodes, but not in the lung, skin, esophagus, or some other internal organs under normal conditions. The presence of eosinophils in these latter organs is associated with disease. For instance, patients with eosinophilic asthma have high levels of eosinophils that lead to inflammation and tissue damage, making it more difficult for patients to breathe. Eosinophils persist in the circulation for 8–12 hours, and can survive in tissue for an additional 8–12 days in the absence of stimulation. Pioneering work in the 1980s elucidated that eosinophils were unique granulocytes, having the capacity to survive for extended periods of time after their maturation as demonstrated by ex-vivo culture experiments.
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Equine chorionic gonadotropin
Equine chorionic gonadotropin (acronym given as eCG but not to be confused with ECG) is a gonadotropic hormone produced in the chorion of pregnant mares.
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Equus (genus)
Equus is a genus of mammals in the family Equidae, which includes horses, donkeys, and zebras.
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Eri-Aaroni
Eri-Aaroni 3423 Valio (July 12, 1932 – September 1, 1953) was liver chestnut stallion who was a Ravikuningas title winner in harness racing and a very influential Finnhorse sire.
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Estradiol
Estradiol (E2), also spelled oestradiol, is an estrogen steroid hormone and the major female sex hormone.
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Estrin (compound)
Estrin (American English), or oestrin (British English), also known as estra-1,3,5(10)-triene, is an estrane steroid.
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Estrogen
Estrogen, or oestrogen, is the primary female sex hormone.
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Estrogen and neurodegenerative diseases
Neurodegenerative diseases can disrupt the normal human homeostasis and result in abnormal estrogen levels.
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Estrogen insensitivity syndrome
Estrogen insensitivity syndrome (EIS), or estrogen resistance, is a form of congenital estrogen deficiency or hypoestrogenism which is caused by a defective estrogen receptor (ER) – specifically, the estrogen receptor alpha (ERα) – that results in an inability of estrogen to mediate its biological effects in the body.
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Estrus (disambiguation)
Estrus is the phase when the female of a species is sexually receptive.
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Eurasian beaver
The Eurasian beaver or European beaver (Castor fiber) is a species of beaver which was once widespread in Eurasia.
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Eurasian lynx
The Eurasian lynx (Lynx lynx) is a medium-sized wild cat native to Siberia, Central, Eastern, and Southern Asia, Northern, Central and Eastern Europe.
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Eurobird (horse)
Eurobird (11 February 1984 – after 2005) was an Irish Thoroughbred racehorse and broodmare.
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European badger
The European badger (Meles meles) also known as the Eurasian badger or simply badger, is a species of badger in the family Mustelidae and is native to almost all of Europe and some parts of West Asia.
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European mink
The European mink (Mustela lutreola), also known as the Russian mink, and Eurasian mink is a semiaquatic species of mustelid native to Europe.
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Extended female sexuality
Extended female sexuality is where the female of a species mates when infertile.
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Fallow deer
The fallow deer (Dama dama) is a ruminant mammal belonging to the family Cervidae.
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Fancy mouse
A fancy mouse (“fancy” means “hobby” in this context) is a domesticated form of the house mouse (Mus musculus), usually bred as a pet; a type of pocket pet.
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Fashion (horse)
Fashion (1837–1860), was a Thoroughbred four-mile (6,400 meter) racemare that defeated Boston and set a record of 7:32½, for that distance, before the American Civil War.
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Fennec fox
The fennec fox or fennec (Vulpes zerda) is a small nocturnal fox found in the Sahara of North Africa, the Sinai Peninsula, South West Israel (Arava desert) Encyclopedia of Zoology, Ynet and the Arabian desert.
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Ferret health
The domestic ferret is known to be affected by several distinct ferret health problems.
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Filly
A filly is a female horse that is too young to be called a mare.
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Fisher (animal)
The fisher (Pekania pennanti) is a small, carnivorous mammal native to North America.
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Flehmen response
The flehmen response, also called the flehmen position, flehmen reaction, flehming, or flehmening, is a behavior in which an animal curls back its upper lip exposing its front teeth, inhales with the nostrils usually closed, and then often holds this position for several seconds.
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Flugestone acetate
Flugestone acetate (abbreviated as FGA), sold under the brand name Cronolone among others, is a progestin medication which is used in veterinary medicine.
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Follicular phase
The follicular phase is the phase of the estrous cycle, (or, in humans and great apes, the menstrual cycle) during which follicles in the ovary mature.
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Folliculostellate cell
A Folliculostellate (FS) cell is a type of non-endocrine cell found in the anterior lobe of the pituitary gland.
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Food of the Gods II
Food of the Gods II, sometimes referred to as Gnaw: Food of the Gods II as well as Food of the Gods Part 2, is a 1989 film that is a very loose sequel to the 1976 Bert I. Gordon film based on H.G. Wells' novel, The Food of the Gods.
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Formosan black bear
The Formosan black bear (臺灣黑熊, Ursus thibetanus formosanus), also known as the white-throated bear, is a subspecies of the Asiatic black bear.
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Formosan rock macaque
The Formosan rock macaque (Macaca cyclopis), Formosan rock monkey, or Taiwanese macaque, is a macaque endemic to the island of Taiwan and has been introduced to Japan.
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Four-toed hedgehog
The four-toed hedgehog (Atelerix albiventris) or African pygmy hedgehog, is a species of hedgehog found throughout much of central and eastern Africa.
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Fox
Foxes are small-to-medium-sized, omnivorous mammals belonging to several genera of the family Canidae.
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Francis Marshall (physiologist)
Francis Hugh Adam Marshall CBE FRS FRSE (11 July 1878, High Wycombe – 5 February 1949, Cambridge) was a British physiologist who did pioneering early research into the physiology and endocrinology of biological reproduction.
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Frankish language
Frankish (reconstructed Frankish: *italic), Old Franconian or Old Frankish was the West Germanic language spoken by the Franks between the 4th and 8th century.
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Freezing behavior
Freezing behavior or the freeze response is a reaction to specific stimuli, most commonly observed in prey animals.
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Furan fatty acids
Furan fatty acids are a group of fatty acids that contain a furan ring.
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Gelada
The gelada (Theropithecus gelada, translit), sometimes called the bleeding-heart monkey or the gelada baboon, is a species of Old World monkey found only in the Ethiopian Highlands, with large populations in the Semien Mountains.
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Gelding
A gelding is a castrated horse or other equine, such as a donkey or a mule.
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Geoffroy's cat
Geoffroy's cat (Leopardus geoffroyi) is a wild cat native to the southern and central regions of South America.
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Giant anteater
The giant anteater (Myrmecophaga tridactyla), also known as the ant bear, is a large insectivorous mammal native to Central and South America.
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Giant eland
The giant eland (Taurotragus derbianus), also known as the Lord Derby eland, is an open-forest and savanna antelope.
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Giant mouse lemur
The giant mouse lemurs (members of the genus Mirza) are a genus of strepsirrhine primates.
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Giant otter
The giant otter or giant river otter (Pteronura brasiliensis) is a South American carnivorous mammal.
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Giant panda
The giant panda (Ailuropoda melanoleuca, literally "black and white cat-foot";, literally "big bear cat"), also known as panda bear or simply panda, is a bear native to south central China.
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Giraffe
The giraffe (Giraffa) is a genus of African even-toed ungulate mammals, the tallest living terrestrial animals and the largest ruminants.
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Goat
The domestic goat (Capra aegagrus hircus) is a subspecies of goat domesticated from the wild goat of southwest Asia and Eastern Europe.
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Golden hamster
The golden hamster or Syrian hamster (Mesocricetus auratus) is a rodent in the subfamily Cricetinae, the hamsters.
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Gray brocket
The gray brocket (Mazama gouazoubira), also known as the brown brocket, is a species of brocket deer from northern Argentina, Bolivia, southern Peru, eastern and southern Brazil, Paraguay, and Uruguay.
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Gray langur
Gray langurs or Hanuman langurs, the most widespread langurs of the Indian Subcontinent, are a group of Old World monkeys constituting the entirety of the genus Semnopithecus (from Ancient Greek σεμνός semnós, “revered, august, holy”, and πίθηκος píthēkos, “ape, monkey”).
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Gray mouse lemur
The gray mouse lemur (Microcebus murinus), grey mouse lemur or lesser mouse lemur, is a small lemur, a type of strepsirrhine primate, found only on the island of Madagascar.
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Gray short-tailed opossum
The gray short-tailed opossum (Monodelphis domestica) is a small South American member of the Didelphidae family of opossums.
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Gray wolf
The gray wolf (Canis lupus), also known as the timber wolf,Paquet, P. & Carbyn, L. W. (2003).
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Greater kudu
The greater kudu (Tragelaphus strepsiceros) is a woodland antelope found throughout eastern and southern Africa.
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Greenlandic sheep
The Greenlandic sheep (sava) (Danish: grønlandsk får) is a breed of domestic sheep.
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Grivet
The grivet (Chlorocebus aethiops), also known as African green monkey and savannah monkey is an Old World monkey with long white tufts of hair along the sides of the face.
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Hamster
Hamsters are rodents (order Rodentia) belonging to the subfamily Cricetinae, which contains about 25 species classified in six or seven genera.
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Hardware disease
Hardware disease is a common term for bovine traumatic reticuloperitonitis.
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Hartebeest
The hartebeest (Alcelaphus buselaphus), also known as kongoni, is an African antelope.
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Heat (disambiguation)
Heat as a technical term in classical thermodynamics is a process function describing the amount of energy transferred between systems in the form of thermal energy.
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Hera
Hera (Ἥρᾱ, Hērā; Ἥρη, Hērē in Ionic and Homeric Greek) is the goddess of women, marriage, family, and childbirth in Ancient Greek religion and myth, one of the Twelve Olympians and the sister-wife of Zeus.
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Herbert McLean Evans
Herbert McLean Evans (September 23, 1882 – March 6, 1971) was a U.S. anatomist and embryologist.
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Hilda Margaret Bruce
Hilda Margaret Bruce (5 April 1903 – 2 November 1974) was a British zoologist, best known for her discovery of the Bruce effect, a pheromonal behaviour observed in many rodent species.
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Hinny
A hinny is a domestic equine hybrid that is the offspring of a male horse, a stallion, and a female donkey, a jenny.
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Hippopotamus
The common hippopotamus (Hippopotamus amphibius), or hippo, is a large, mostly herbivorous, semiaquatic mammal native to sub-Saharan Africa, and one of only two extant species in the family Hippopotamidae, the other being the pygmy hippopotamus (Choeropsis liberiensis or Hexaprotodon liberiensis).
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Hispaniolan hutia
The Hispaniolan hutia (Plagiodontia aedium) is one of several hutia (also called zagouti, and jutía in Spanish) species to have inhabited at some time the island of Hispaniola (island shared by Haiti and the Dominican Republic).
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Homosexual behavior in animals
Homosexual behavior in animals is sexual behavior among non-human species that is interpreted as homosexual or bisexual.
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Hooper's mouse
Hooper's mouse (Peromyscus hooperi) is a species of rodents in the family Cricetidae.
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Horse
The horse (Equus ferus caballus) is one of two extant subspecies of ''Equus ferus''.
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Horse behavior
Horse behavior is best understood from the view that horses are prey animals with a well-developed fight-or-flight response.
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Horse breeding
Horse breeding is reproduction in horses, and particularly the human-directed process of selective breeding of animals, particularly purebred horses of a given breed.
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House mouse
The house mouse (Mus musculus) is a small mammal of the order Rodentia, characteristically having a pointed snout, small rounded ears, and a long naked or almost hairless tail.
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Huaca de Chena
Huaca de Chena, also known as the Chena Pukara, is an Inca site on Chena Mountain, in the basin of San Bernardo, commune of Calera de Tango, Maipo Province, Chile.
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Human
Humans (taxonomically Homo sapiens) are the only extant members of the subtribe Hominina.
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Hydroxyprogesterone acetate
Hydroxyprogesterone acetate (OHPA), sold under the brand name Prodox, is an orally active progestin related to hydroxyprogesterone caproate (OHPC) which has been used in clinical and veterinary medicine.
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Hypothalamus
The hypothalamus(from Greek ὑπό, "under" and θάλαμος, thalamus) is a portion of the brain that contains a number of small nuclei with a variety of functions.
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Icelandic sheep
The Icelandic sheep (sauðkindin) is a breed of domestic sheep.
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Impala
The impala; (Aepyceros melampus) is a medium-sized antelope found in eastern and southern Africa.
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Indian leopard
The Indian leopard (Panthera pardus fusca) is a leopard subspecies widely distributed on the Indian subcontinent.
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Indian pariah dog
The Indian pariah dog (Canis lupus familiaris) is the aboriginal landrace, or naturally selected dog, of the Indian sub-continent.
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Induced ovulation (animals)
Ovulation occurs at the ovary surface and is described as the process in which an oocyte (female germ cell) is released from the follicle.
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Infanticide (zoology)
In animals, infanticide involves the killing of young offspring by a mature animal of the same species, and is studied in zoology, specifically in the field of ethology.
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Infanticide in primates
Infanticide in non-human primates occurs when an individual kills its own or another individual's dependent young.
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Jaguar
The jaguar (Panthera onca) is a wild cat species and the only extant member of the genus Panthera native to the Americas.
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Jaguarundi
The jaguarundi (Herpailurus yagouaroundi) or eyra is a small wild cat native to southern North America and South America.
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Jameson's red rock hare
Jameson's red rock hare (Pronolagus randensis) is a leporid found only on the continent of Africa, mostly in the southern portion of the continent.
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Judith Hand
Judith L. Hand is an evolutionary biologist, animal behaviorist (ethologist), novelist, and pioneer in the emerging field of peace ethology.
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Julie's Wolf Pack
Julie's Wolf Pack is a 1997 novel written by Jean Craighead George.
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Jungle cat
The jungle cat (Felis chaus), also called reed cat and swamp cat, is a medium-sized cat native to the Middle East, South and Southeast Asia and southern China.
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Kalahari Meerkat Project
The Kalahari Meerkat Project, or KMP, is a long term research project focused on studying the evolutionary causes and ecological consequences of cooperative behaviors in meerkats.
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Kangaroo
The kangaroo is a marsupial from the family Macropodidae (macropods, meaning "large foot").
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Kasakela chimpanzee community
The Kasakela chimpanzee community is a habituated community of wild eastern chimpanzees that lives in Gombe National Park near Lake Tanganyika in Tanzania.
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Killer whale
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Koala
The koala (Phascolarctos cinereus, or, inaccurately, koala bear) is an arboreal herbivorous marsupial native to Australia.
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Kultarr
The kultarr (Antechinomys laniger) (also called the "jerboa-marsupial") is a small insectivorous nocturnal marsupial inhabiting the arid interior of Australia.
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Laboratory mouse
The laboratory mouse is a small mammal of the order Rodentia which is bred and used for scientific research.
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Laboratory Syrian hamster
Syrian hamsters (Mesocricetus auratus) are one of several rodents used in animal testing.
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Lap dance
A lap dance (or contact dance) is a type of erotic dance performance offered in some strip clubs in which the dancer typically has body contact with a seated patron.
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Least chipmunk
The least chipmunk (Tamias minimus) is the smallest species of chipmunk, and the most widespread in North America.
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Lee–Boot effect
The Lee–Boot effect is a phenomenon concerning the suppression or prolongation of oestrous cycles of mature female mice (and other rodents), when females are housed in groups and isolated from males.
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Lemur
Lemurs are a clade of strepsirrhine primates endemic to the island of Madagascar.
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Leopard
The leopard (Panthera pardus) is one of the five species in the genus Panthera, a member of the Felidae.
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Leopard cat
The leopard cat (Prionailurus bengalensis) is a small wild cat native to continental South, Southeast and East Asia.
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Lesser kudu
The lesser kudu (Tragelaphus imberbis) is a forest antelope found in East Africa.
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Lion
The lion (Panthera leo) is a species in the cat family (Felidae).
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List of dog diseases
This list of dog diseases is a selection of diseases and other conditions found in the dog.
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List of MeSH codes (G08)
The following is a list of the "G" codes for MeSH.
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List of Prehistoric Park episodes
The following is a list of episodes of Prehistoric Park.
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List of words that may be spelled with a ligature
This list of words that may be spelled with a ligature in English encompasses words which have letters that may, in modern usage, either be rendered as two distinct letters or as a single, combined letter.
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Long-footed potoroo
The long-footed potoroo (Potorous longipes) is a species of potoroo found in southeastern Australia, in a small area around the coastal border between New South Wales and Victoria.
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Long-tongued nectar bat
The long-tongued nectar bat (Macroglossus minimus), also known as the northern blossom bat, honey nectar bat, least blossom-bat, dagger-toothed long-nosed fruit bat, and lesser long-tongued fruit bat, is a species of megabat.
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Lordosis behavior
Lordosis behavior, also known as mammalian lordosis (Greek lordōsis, from lordos "bent backward") or presenting, is the naturally occurring body posture for sexual receptivity to copulation present in most mammals including rodents, elephants, and felines.
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Luteal phase
The luteal phase is the latter phase of the menstrual cycle (in humans and a few other animals) or the earlier phase of the estrous cycle (in other placental mammals).
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Luteolysis
Luteolysis (also known as luteal regression) is the structural and functional degradation of the corpus luteum (CL), which occurs at the end of the luteal phase of both the estrous and menstrual cycles in the absence of pregnancy.
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Lyudmila Trut
Lyudmila N. Trut (born 6 November 1933) is a Russian Geneticist, Ethologist, and Evolutionist known for developing domesticated foxes from wild foxes, with Dmitry Belyayev as part of the Domesticated red fox experiment in Russia, at the Institute of Cytology and Genetics in Novosibirsk.
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Major urinary proteins
Major urinary proteins (Mups), also known as α2u-globulins, are a subfamily of proteins found in abundance in the urine and other secretions of many animals.
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Mammal
Mammals are the vertebrates within the class Mammalia (from Latin mamma "breast"), a clade of endothermic amniotes distinguished from reptiles (including birds) by the possession of a neocortex (a region of the brain), hair, three middle ear bones, and mammary glands.
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Mammalian reproduction
Most mammals are viviparous, giving birth to live young.
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Mammary gland
A mammary gland is an exocrine gland in mammals that produces milk to feed young offspring.
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Mammary tumor
A mammary tumor is a neoplasm originating in the mammary gland.
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Mandrill
The mandrill (Mandrillus sphinx) is a primate of the Old World monkey (Cercopithecidae) family.
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Mannose receptor
The mannose receptor (Cluster of Differentiation 206, CD206) is a C-type lectin primarily present on the surface of macrophages and immature dendritic cells, but is also expressed on the surface of skin cells such as human dermal fibroblasts and keratinocytes.
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Mantled howler
The mantled howler (Alouatta palliata), or golden-mantled howling monkey, is a species of howler monkey, a type of New World monkey, from Central and South America.
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Marco Polo sheep
The Marco Polo sheep (Ovis ammon polii) is a subspecies of argali sheep, named after Marco Polo.
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Mare
A mare is an adult female horse or other equine.
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Margay
The margay (Leopardus wiedii) is a small wild cat native to Central and South America.
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Marsh rice rat
The marsh rice rat (Oryzomys palustris) is a semiaquatic North American rodent in the family Cricetidae.
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Marwell (horse)
Marwell (21 May 1978 – October 2003) was an Irish-bred, British-trained Thoroughbred racehorse and broodmare.
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Masked palm civet
The masked palm civet or gem-faced civet (Paguma larvata) is a civet species native to the Indian Subcontinent and Southeast Asia.
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Masoala fork-marked lemur
The Masoala fork-marked lemur (Phaner furcifer), also known as the eastern fork-marked lemur or Masoala fork-crowned lemur, is a species of lemur found in the coastal forests of northeastern Madagascar.
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Massese sheep
The Massese is a breed of domestic sheep from the Alpi Apuane mountains of the province of Massa Carrara, in Tuscany, central Italy.
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Mate guarding in humans
Human mate guarding refers to behaviours employed by both males and females with the aim of maintaining reproductive opportunities and sexual access to a mate.
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Mating system
A mating system is a way in which a group is structured in relation to sexual behaviour.
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Max Guevara
Max Guevara (X5-452) is a fictional character and the protagonist of the cyberpunk science fiction television program Dark Angel.
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Mecca's Angel
Mecca's Angel (foaled 11 February 2011) is an Irish-bred, British-trained Thoroughbred racehorse.
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Melatonin
Melatonin, also known as N-acetyl-5-methoxy tryptamine, is a hormone that is produced by the pineal gland in animals and regulates sleep and wakefulness.
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Membrane androgen receptor
Membrane androgen receptors (mARs) are a group of G protein-coupled receptors (GPCRs) which bind and are activated by testosterone and/or other androgens.
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Membrane progesterone receptor
Membrane progesterone receptors (mPRs) are a group of cell surface receptors and membrane steroid receptors belonging to the progestin and adipoQ receptor (PAQR) family which bind the endogenous progestogen and neurosteroid progesterone, as well as the neurosteroid allopregnanolone.
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Menstrual synchrony
Menstrual synchrony, also called the McClintock effect is an alleged process whereby women who begin living together in close proximity experience their menstrual cycle onsets (the onset of menstruation or menses) becoming more synchronized together in time than when previously living apart.
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Menstruation
Menstruation, also known as a period or monthly, is the regular discharge of blood and mucosal tissue (known as menses) from the inner lining of the uterus through the vagina.
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Menstruation (mammal)
Menstruation in mammals is the shedding of the uterine lining (endometrium).
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Metallibure
Metallibure (brand names Aimax, Suisynchron, Turisynchron; former developmental code names ICI-33828, AY-61122, NSC-69536), or methallibure is a nonsteroidal antigonadotropin that was introduced in 1973 and has been used in veterinary medicine to synchronize estrus.
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Mexican deer mouse
The Mexican deer mouse (Peromyscus mexicanus) is a species of forest-dwelling rodent in the family Cricetidae.
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Mexican free-tailed bat
The Mexican free-tailed bat or Brazilian free-tailed bat (Tadarida brasiliensis) is a medium-sized bat that is native to the Americas, regarded as one of the most abundant mammals in North America.
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Mibolerone
Mibolerone, also known as dimethylnortestosterone (DMNT) and sold under the brand names Cheque Drops and Matenon, is a synthetic, orally active, and extremely potent anabolic–androgenic steroid (AAS) and a 17α-alkylated nandrolone (19-nortestosterone) derivative which was marketed by Upjohn for use as a veterinary drug.
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Mimicry
In evolutionary biology, mimicry is a similarity of one organism, usually an animal, to another that has evolved because the resemblance is selectively favoured by the behaviour of a shared signal receiver that can respond to both.
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Mona ground iguana
The Mona ground iguana (Cyclura cornuta stejnegeri) is a subspecies of the rhinoceros iguana (Cyclura cornuta).
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Mongolian gerbil
Meriones unguiculatus, the Mongolian gerbil or Mongolian jird, is a small rodent belonging to the subfamily Gerbillinae.
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Montane vole
The montane vole (Microtus montanus) is a species of vole native to the western United States and Canada.
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Mountain goat
The mountain goat (Oreamnos americanus), also known as the Rocky Mountain goat, is a large hoofed mammal endemic to North America.
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Mountain nyala
The mountain nyala (Tragelaphus buxtoni) or balbok is an antelope found in high altitude woodland in a small part of central Ethiopia.
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Mountain tapir
The mountain tapir or woolly tapir (Tapirus pinchaque) is the second-smallest of the five species of tapir, only the recently described Tapirus kabomani being smaller, and is the only one to live outside of tropical rainforests in the wild.
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Mountain treeshrew
The mountain treeshrew (Tupaia montana) is a treeshrew species within the Tupaiidae.
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Mouse
A mouse (Mus), plural mice, is a small rodent characteristically having a pointed snout, small rounded ears, a body-length scaly tail and a high breeding rate.
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Mule
A mule is the offspring of a male donkey (jack) and a female horse (mare).
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Mule deer
The mule deer (Odocoileus hemionus) is a deer indigenous to western North America; it is named for its ears, which are large like those of the mule.
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Musth
Musth or must is a periodic condition in bull (male) elephants, characterized by highly aggressive behavior and accompanied by a large rise in reproductive hormones.
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Neuroplasticity
Neuroplasticity, also known as brain plasticity and neural plasticity, is the ability of the brain to change throughout an individual's life, e.g., brain activity associated with a given function can be transferred to a different location, the proportion of grey matter can change, and synapses may strengthen or weaken over time.
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Neutering
Neutering, from the Latin neuter ('of neither sex'), is the removal of an animal's reproductive organ, either all of it or a considerably large part.
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New Guinea singing dog
The New Guinea singing dog or New Guinea Highland dog (Canis lupus dingo or Canis familiaris) is a type of rare dog native to the New Guinea Highlands of the island of New Guinea.
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Nile lechwe
The Nile lechwe or Mrs Gray's lechwe (Kobus megaceros) is an endangered species of antelope found in swamps and grasslands in South Sudan and Ethiopia.
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Nilgai
The nilgai or blue bull (literally meaning "blue cow"; Boselaphus tragocamelus) is the largest Asian antelope and is endemic to the Indian subcontinent.
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Norgestomet
Norgestomet, or norgestamet, sold under the brand name Syncro-Mate B and Crestar, is a progestin medication which is used in veterinary medicine to control estrus and ovulation in cattle.
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North American river otter
The North American river otter (Lontra canadensis), also known as the northern river otter or the common otter, is a semiaquatic mammal endemic to the North American continent found in and along its waterways and coasts.
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Northern tamandua
The northern tamandua (Tamandua mexicana) is a species of tamandua, an anteater in the family Myrmecophagidae.
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Oestrus ovis
Oestrus ovis, the sheep bot fly, is a widespread species of fly of the genus Oestrus.
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Okapi
The okapi (Okapia johnstoni), also known as the forest giraffe, congolese giraffe or zebra giraffe, is an artiodactyl mammal native to the northeast of the Democratic Republic of the Congo in Central Africa.
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Olympic marmot
The Olympic marmot (Marmota olympus) is a rodent in the squirrel family, Sciuridae; it occurs only in the U.S. state of Washington, on the middle elevations of the Olympic Peninsula.
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Oncilla
The oncilla (Leopardus tigrinus), also known as the northern tiger cat, little spotted cat, and tigrillo, is a small spotted cat ranging from Central America to central Brazil.
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Oogenesis
Oogenesis, ovogenesis, or oögenesis is the differentiation of the ovum (egg cell) into a cell competent to further development when fertilized.
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Opportunistic breeder
Flexible or opportunistic breeders mate whenever the conditions of their environment become favorable.
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Oribi
The oribi (Ourebia ourebi) is a small antelope found in eastern, southern and western Africa.
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Osman Hill's mangabey
The Osman Hill's mangabey (Lophocebus osmani), also known as the rusty-mantled mangabey, is a species of crested mangabey in the family Cercopithecidae with a restricted distribution in West Africa.
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Ovandrotone albumin
Ovandrotone albumin (brand names Fecundin, Ovastim), also known as polyandroalbumin, as well as ovandrotone:human serum albumin conjugate, is an immunogen and vaccine against androstenedione that is used in veterinary medicine to increase the ovulation rate and number of lambs born to ewes.
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Ovulatory shift hypothesis
The ovulatory shift hypothesis is the theory that women experience evolutionarily adaptive changes in subconscious thoughts and behaviors related to mating across the ovulatory cycle.
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Pallas's cat
The Pallas's cat (Otocolobus manul), also called the manul, is a small wild cat with a broad but fragmented distribution in the grasslands and montane steppes of Central Asia.
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Pallid bat
The pallid bat (Antrozous pallidus) is a species of bat that ranges from western Canada to central Mexico.
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Pampas fox
The pampas fox (Lycalopex gymnocercus), also known as grey pampean fox, aguará chaí, aguarachay, Azara's fox, or Azara's zorro, is a medium-sized zorro, or "false" fox, native to the South American pampas.
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Panamint kangaroo rat
The Panamint kangaroo rat (Dipodomys panamintinus) is a species of rodent in the family Heteromyidae.
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Panthera hybrid
A Panthera hybrid is a crossbreed between any of the four species tiger, lion, jaguar and leopard in captivity.
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Parasitic flies of domestic animals
Many species of flies of the two-winged type, Order Diptera, such as mosquitoes, horse-flies, blow-flies and warble-flies cause direct parasitic disease to domestic animals, and transmit organisms that cause diseases.
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Patagonian mara
The Patagonian mara (Dolichotis patagonum) is a relatively large rodent in the mara genus (Dolichotis).
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Pebbles (horse)
Pebbles (1981–2005) was a British-bred Thoroughbred race horse.
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Perception of infrasound
Infrasound is sound at frequencies lower than the low frequency end of human hearing threshold at 20 Hz.
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Pheromone
A pheromone (from Ancient Greek φέρω phero "to bear" and hormone, from Ancient Greek ὁρμή "impetus") is a secreted or excreted chemical factor that triggers a social response in members of the same species.
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Philippine tarsier
The Philippine tarsier (Carlito syrichta), known locally as mawmag in Cebuano/Visayans and mamag in Luzon, is a species of tarsier endemic to the Philippines.
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Phoca
Phoca is a genus of the earless seals, within the family Phocidae.
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Phytoestrogens
Phytoestrogens are plant-derived xenoestrogens (see estrogen) not generated within the endocrine system, but consumed by eating phytoestrogenic plants.
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Pig farming
Pig farming is the raising and breeding of domestic pigs as livestock, and is a branch of animal husbandry.
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Pinniped
Pinnipeds, commonly known as seals, are a widely distributed and diverse clade of carnivorous, fin-footed, semiaquatic marine mammals.
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Plains zebra
The plains zebra (Equus quagga, formerly Equus burchellii), also known as the common zebra or Burchell's zebra, or locally as the "quagga" (not to be confused with the extinct subspecies), is the most common and geographically widespread species of zebra.
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Polygyny in animals
Polygyny (from Neo-Greek πολυγυνία from πολύ- poly- "many", and γυνή gyne "woman" or "wife") is a mating system in which one male lives and mates with multiple females, but each female only mates with a single male.
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Polymeric immunoglobulin receptor
Polymeric immunoglobulin receptor (pIgR) is a transmembrane protein that in humans is encoded by the PIGR gene.
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Polynesian rat
The Polynesian rat, or Pacific rat (Rattus exulans), known to the Māori as kiore, is the third most widespread species of rat in the world behind the brown rat and black rat.
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Pon farr
Pon farr is a phenomenon in the fictional Star Trek universe.
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Pony ride
A pony ride is an opportunity for children to ride real ponies for a short time, usually seen at fairs, guest ranches, zoos, summer camps, private children's parties and similar places.
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Prairie dog
Prairie dogs (genus Cynomys) are herbivorous burrowing rodents native to the grasslands of North America.
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Predator (fictional species)
The Predator (also known as Yautja or Hish-Qu-Ten) is a fictional extraterrestrial species featured in the ''Predator'' science-fiction franchise, characterized by its trophy hunting of other species for sport.
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Preseli (horse)
Preseli (foaled 10 February 1997) is an Irish-bred Thoroughbred racehorse and broodmare.
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Presenting
In medicine, the term presenting means not only present, but seen.
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Princess Pati
Princess Pati (8 March 1981 – after 1999) was an Irish Thoroughbred racehorse and broodmare.
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Progesterone devices used in farm animals
Progesterone devices are broadly used in the control of reproductive management in livestock.
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Progesterone-releasing intravaginal device
Intravaginal progesterone devices are broadly used in the control of reproductive management in cattle.
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Progestogen
Progestogens, also sometimes spelled progestagens or gestagens, are a class of steroid hormones that bind to and activate the progesterone receptor (PR).
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Proligestone
Proligestone, sold under the brand names Covinan and Delvosteron, is a progestin medication which is used in veterinary medicine.
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Prostaglandin F receptor
Prostaglandin F receptor (FP) is a receptor belonging to the prostaglandin (PG) group of receptors.
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Pseudopregnancy
Pseudopregnancy is the term used to describe a false pregnancy in the wider mammalian species.
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Puppy mill
A puppy mill, sometimes known as a puppy farm, is a type of commercial dog breeding facility.
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Pygmy goat
The African pygmy goat is a breed of miniature domestic goat.
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Pygmy hippopotamus
The pygmy hippopotamus (Choeropsis liberiensis or Hexaprotodon liberiensis) is a small hippopotamid which is native to the forests and swamps of West Africa, primarily in Liberia, with small populations in Sierra Leone, Guinea, and Ivory Coast.
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Pygmy slow loris
The pygmy slow loris (Nycticebus pygmaeus) is a species of slow loris found east of the Mekong River in Vietnam, Laos, eastern Cambodia, and China.
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Pyometra
Pyometra or pyometrea is a uterine infection.
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Q fever
Q fever is a disease caused by infection with Coxiella burnetii, a bacterium that affects humans and other animals.
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Quintaglio Ascension Trilogy
The Quintaglio Ascension Trilogy is a series of novels written by Canadian science fiction author Robert J. Sawyer.
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Raccoon dog
The raccoon dog (Nyctereutes procyonoides, from the Greek words nukt-, "night" + ereutēs, "wanderer" + prokuōn, "before-dog" + -oidēs, "similar to"), also known as the mangut (its Evenki name) is a canid indigenous to East Asia.
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Rebelline
Rebelline (foaled 29 April 1998) was an Irish Thoroughbred racehorse and broodmare.
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Red fox
The red fox (Vulpes vulpes) is the largest of the true foxes and one of the most widely distributed members of the order Carnivora, being present across the entire Northern Hemisphere from the Arctic Circle to North Africa, North America and Eurasia.
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Red river hog
The red river hog (Potamochoerus porcus), also known as the bush pig (but not to be confused with P. larvatus, common name "bushpig"), is a wild member of the pig family living in Africa, with most of its distribution in the Guinean and Congolian forests.
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Red-flanked duiker
The red-flanked duiker (Cephalophus rufilatus) is a species of small antelope found in western and central Africa in countries as far apart as Senegal and Sudan.
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Relapse
In medicine, relapse or recidivism is a recurrence of a past (typically medical) condition.
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Richard Castle
Richard Edgar "Rick" Castle (born Richard Alexander Rodgers) is a fictional character on the ABC crime series Castle.
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Richard Despard Estes
Richard Despard Estes (born 1928) is a biologist specialising in the behaviour of mammals in mainland Africa.
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Riddelliine
Riddelliine (not to be confused with Ritalin) is a chemical compound classified as a pyrrolizidine alkaloid.
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Ring-tailed lemur
The ring-tailed lemur (Lemur catta) is a large strepsirrhine primate and the most recognized lemur due to its long, black and white ringed tail.
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Roadkill
Roadkill refers to an animal or animals that have been struck and killed by motor vehicles on highways.
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Roadrunner
The roadrunners (genus Geococcyx), also known as chaparral birds or chaparral cocks, are two species of fast-running ground cuckoos with long tails and crests.
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Ruffed lemur
The ruffed lemurs of the genus Varecia are strepsirrhine primates and the largest extant lemurs within the family Lemuridae.
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Rusty-spotted cat
The rusty-spotted cat (Prionailurus rubiginosus) is one of the cat family's smallest members, of which historical records are known only from India and Sri Lanka.
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Rut (mammalian reproduction)
The rut, derived from the Latin rugire (meaning "to roar"), is the mating season of mammals which includes ruminant animals such as deer, sheep, camels, goats, pronghorns, bison, giraffes and antelopes but extends to others such as skunks and elephants.
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Sable
The sable (Martes zibellina) is a marten species, a small carnivorous mammal inhabiting forest environments, primarily in Russia from the Ural Mountains throughout Siberia, northern Mongolia.
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Sambar deer
The sambar (Rusa unicolor) is a large deer native to the Indian subcontinent, southern China, and Southeast Asia that is listed as Vulnerable on the IUCN Red List since 2008.
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Sand cat
The sand cat (Felis margarita), also known as the sand dune cat, is the only cat living foremost in true deserts.
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Sanedtki
Sanedtki (1974 – after 1993) was an Irish-bred, Thoroughbred racehorse and broodmare who was trained in France for most of her career before moving to the United States for her last two races.
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Sarah Blaffer Hrdy
Sarah Hrdy (née Blaffer; born July 11, 1946) is an American anthropologist and primatologist who has made several major contributions to evolutionary psychology and sociobiology.
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Sciaenidae
The Sciaenidae are a family of fish commonly called drums or croakers in reference to the repetitive throbbing or drumming sounds they make.
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Scimitar oryx
The scimitar oryx or scimitar-horned oryx (Oryx dammah), also known as the Sahara oryx, is a species of Oryx once widespread across North Africa which went extinct in the wild in 2000.
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Scrub hare
The scrub hare (Lepus saxatilis) is one of two subspecies of hares found in southern Namibia, Mozambique, South Africa, Swaziland and Lesotho.
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Sea otter
The sea otter (Enhydra lutris) is a marine mammal native to the coasts of the northern and eastern North Pacific Ocean.
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Season (disambiguation)
A season is one of the major divisions of the year.
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Seasonal breeder
Seasonal breeders are animal species that successfully mate only during certain times of the year.
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Selmar Aschheim
Selmar Aschheim (4 October 1878 – 15 February 1965) was a German gynecologist who was a native resident of Berlin.
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Semelparity and iteroparity
Semelparity and iteroparity are two classes of possible reproductive strategies available to living organisms.
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Serval
The serval (Leptailurus serval) is a wild cat native to Africa.
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Sexual intercourse
Sexual intercourse (or coitus or copulation) is principally the insertion and thrusting of the penis, usually when erect, into the vagina for sexual pleasure, reproduction, or both.
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Sexual reproduction
Sexual reproduction is a form of reproduction where two morphologically distinct types of specialized reproductive cells called gametes fuse together, involving a female's large ovum (or egg) and a male's smaller sperm.
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Sexual suggestiveness
Sexual suggestiveness is visual, verbal, written or behavioral material or action with sexual undertones implying sexual intent in order to provoke sexual arousal.
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Sexual swelling
Sexual swellings are enlarged areas of the perineal skin occurring in some female primates that vary in size over the course of the menstrual cycle.
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Sexuality in ancient Rome
Sexuality in ancient Rome, and more broadly, sexual attitudes and behaviors in ancient Rome, are indicated by Roman art, literature and inscriptions, and to a lesser extent by archaeological remains such as erotic artifacts and architecture.
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Sexually dimorphic nucleus
The sexually dimorphic nucleus (SDN) is an ovoid, densely packed cluster of large cells located in the medial preoptic area (POA) of the hypothalamus which is believed to be related to sexual behavior in animals.
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Sheep
Domestic sheep (Ovis aries) are quadrupedal, ruminant mammal typically kept as livestock.
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Sheep farming
Sheep farming is the raising and breeding of domestic sheep.
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Sheep milk
Sheep's milk (or ewes' milk) is the milk of domestic sheep.
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Signorinetta
Signorinetta (1905–1928) was a British Thoroughbred racehorse and broodmare.
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Silver fox (animal)
The silver fox is a melanistic form of the red fox (Vulpes vulpes).
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Sirenia
The Sirenia, commonly referred to as sea cows or sirenians, are an order of fully aquatic, herbivorous mammals that inhabit swamps, rivers, estuaries, marine wetlands, and coastal marine waters.
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Slender mongoose
The slender mongoose (Galerella sanguinea), also known as the black-tipped mongoose or the black-tailed mongoose, is a very common species of mongoose of sub-Saharan Africa.
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Slow loris
Slow lorises are a group of several species of nocturnal strepsirrhine primates that make up the genus Nycticebus.
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Snow leopard
The snow leopard or ounce (Panthera uncia) is a large cat native to the mountain ranges of Central and South Asia.
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Snuppy
Snuppy (Korean: 스너피 a portmanteau of "SNU" and "puppy"; April 24, 2005–May 2015) was an Afghan hound, credited with being the world's first cloned dog.
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Social grooming
Social grooming is a behaviour in which social animals, including humans, clean or maintain one another's body or appearance.
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Social monogamy in mammalian species
Monogamous pairing refers to a general relationship between an adult male and an adult female for the purpose of sexual reproduction.
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South American coati
The South American coati, or ring-tailed coati (Nasua nasua) is a species of coati, members of the raccoon family (Procyonidae), from tropical and subtropical South America.
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South American sea lion
The South American sea lion (Otaria flavescens, formerly Otaria byronia), also called the southern sea lion and the Patagonian sea lion, is a sea lion found on the Ecuadorian, Peruvian, Chilean, Falkland Islands, Argentinean, Uruguayan, and Southern Brazilian coasts.
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South Park (season 3)
The third season of South Park, an American animated television comedy series, originally aired in the United States on Comedy Central between April 7, 1999 and January 12, 2000.
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Southern tamandua
The southern tamandua (Tamandua tetradactyla), also called the collared anteater or lesser anteater, is a species of anteater from South America.
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Spotted hyena
The spotted hyena (Crocuta crocuta), also known as the laughing hyena, is a species of hyena, currently classed as the sole member of the genus Crocuta, native to Sub-Saharan Africa.
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Springbok
The springbok (Antidorcas marsupialis) is a medium-sized antelope found mainly in southern and southwestern Africa.
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Stallion
A stallion is a male horse that has not been gelded (castrated).
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Steenbok
The steenbok (Raphicerus campestris) is a common small antelope of southern and eastern Africa.
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Steppe polecat
The steppe polecat (Mustela eversmanii), also known as the white or masked polecat, is a species of mustelid native to Central and Eastern Europe and Central Asia.
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Stop Dragging Me Down
Stop Draggin Me Down is the debut album by the Bellingham, Washington-based Garage rock group The Mono Men, released in 1990.
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Striped skunk
The striped skunk (Mephitis mephitis) is a skunk of the genus Mephitis that is native to southern Canada, the United States and northern Mexico.
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Sugar glider
The sugar glider (Petaurus breviceps) is a small, omnivorous, arboreal, and nocturnal gliding possum belonging to the marsupial infraclass.
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Sumatran rhinoceros
The Sumatran rhinoceros, also known as the hairy rhinoceros or Asian two-horned rhinoceros (Dicerorhinus sumatrensis), is a rare member of the family Rhinocerotidae and one of five extant rhinoceroses.
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Sunda slow loris
The Sunda slow loris (Nycticebus coucang) or greater slow loris is a strepsirrhine primate and a species of slow loris native to Indonesia, western Malaysia, southern Thailand and Singapore.
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Superfetation
Superfetation (also spelled superfoetation and superfœtation – see fetus) is the simultaneous occurrence of more than one stage of developing offspring in the same animal.
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Svaðilfari
In Norse mythology, Svaðilfari (Old Norse perhaps "unlucky traveler"Orchard (1997:156); derived from Old Norse 'svað': 'slippery' - cf. Norwegian 'svaberg' 'slippery rock'; '-il': footwear, protection for the feet; '-fari': 'someoneone who usually goes somewhere specific', 'a traveller'. Possible meaning "the one that like to go where it is slippery') is a stallion that fathered the eight-legged horse Sleipnir with Loki (in the form of a mare).
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Swamp rabbit
The swamp rabbit (Sylvilagus aquaticus), or swamp hare, is a large cottontail rabbit found in the swamps and wetlands of the southern United States.
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Swamp wallaby
The swamp wallaby (Wallabia bicolor) is a small macropod marsupial of eastern Australia.
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Sweet Catomine
Sweet Catomine (foaled February 14, 2002) is an American Thoroughbred racehorse and broodmare.
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Syrian hamster breeding
Syrian hamster breeding is selective breeding on Syrian hamsters.
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Syrian hamster care
Syrian hamster care includes all the actions which a person might take to promote animal welfare in the Syrian hamster when it lives with humans either as a pet or laboratory animal.
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Tammar wallaby
The tammar wallaby (Macropus eugenii), also known as the dama wallaby or darma wallaby, is a small macropod native to South and Western Australia.
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Tapir
A tapir is a large, herbivorous mammal, similar in shape to a pig, with a short, prehensile nose trunk.
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Tasmanian devil
The Tasmanian devil (Sarcophilus harrisii) is a carnivorous marsupial of the family Dasyuridae.
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Tayra
The tayra (Eira barbara), is an omnivorous animal from the weasel family, native to the Americas.
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Telomian
The Telomian is a breed of dog native to Malaysia.
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Testicle
The testicle or testis is the male reproductive gland in all animals, including humans.
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The Evolution of Human Sexuality
The Evolution of Human Sexuality is a 1979 book about human sexuality by the anthropologist Donald Symons, in which the author discusses topics such as human sexual anatomy, ovulation, orgasm, homosexuality, sexual promiscuity, and rape, attempting to show how evolutionary concepts can be applied to humans.
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The Panther (horse)
The Panther (8 February 1916 – October 1931) was a British Thoroughbred racehorse and sire.
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The Race (Worldwar)
The Race refers to the fictional alien invaders of Harry Turtledove's Worldwar tetralogy, Colonization trilogy and Homeward Bound.
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The Trench (novel)
The Trench (known digitally as The Trench: Meg 2) is a 1999 science fiction horror novel by author Steve Alten, the sequel to Meg: A Novel of Deep Terror and the second book in the MEG series.
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The White Bone
The White Bone is a Canadian novel written by Barbara Gowdy and published by HarperCollins in 1999.
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Three-toed sloth
The three-toed sloths are tree-living mammals from South and Central America.
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Tibetan kyi apso
The Tibetan Kyi Apso, also known as the Apso Do-Kyi, is a rare Tibetan breed of livestock guardian dog.
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Tibetan Mastiff
The Tibetan Mastiff is a large Tibetan dog breed (Canis lupus familiaris) (Tibetan: དོ་ཁྱི, Chinese: 藏獒; Pinyin: Zàng áo).
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Tiger
The tiger (Panthera tigris) is the largest cat species, most recognizable for its pattern of dark vertical stripes on reddish-orange fur with a lighter underside.
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Tim Kerr (musician)
Tim Kerr (born 1956) is an American musician, visual artist and photographer.
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Tragelaphini
The tribe Tragelaphini (sometimes referred to by some authors as "Strepsicerotini"), or the spiral-horned antelopes, are bovines that are endemic to sub-Sahara Africa.
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Twilight at the Well of Souls
Twilight at the Well of Souls is the fifth novel in the Well of Souls series by American author Jack L. Chalker.
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Two Dozen and One Greyhounds
"Two Dozen and One Greyhounds" is the 20th episode of The Simpsons sixth season.
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Uinta ground squirrel
The Uinta ground squirrel (Urocitellus armatus), commonly called a Potgut in northern Utah, is a species of rodent native to the western United States.
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Ultime grida dalla savana
Ultime grida dalla savana (1975), also known as by its English title Savage Man Savage Beast, is a Mondo documentary directed by Antonio Climati and Mario Morra. Filmed all around the world, its central theme focuses on hunting and the interaction between man and animal. More specifically, the film documents various forms of hunting that can be found in the world and how humans and animals can both become the hunter or prey. Like many Mondo films, the filmmakers claim to document real, bizarre and violent behavior and customs, although some scenes were actually staged. It is narrated by the Italian actor and popular dubber Giuseppe Rinaldi and the text was written by Italian novelist Alberto Moravia. This was the first film of Climati's and Morra's Savage Trilogy, which also includes Savana violenta (This Violent World) and Dolce e selvaggio (Sweet and Savage). The best known film of the trilogy, Ultime grida dalla savana became influential in exploitation cinema by use of cinematographic techniques that were repeated in numerous subsequent Mondo films. Two scenes in particular, a lion attack on a tourist in Namibia and the murder of an indigenous man by a group of mercenaries in South America, have gained notoriety as genuine footage of human death. The film also sparked a rivalry between the team of Climati and Morra and the brothers Alfredo and Angelo Castiglioni. These two teams became the forerunners of the second generation of Mondo cinema.
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Uterus
The uterus (from Latin "uterus", plural uteri) or womb is a major female hormone-responsive secondary sex organ of the reproductive system in humans and most other mammals.
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Vaginal cytology
Vaginal cytology is a microscopic examination of cells from the vaginal epithelium.
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Vandenbergh effect
The Vandenbergh effect is a phenomenon reported by J.G. Vandenbergh et al. in 1975, in which an early induction of the first estrous cycle in prepubertal female mice occurs as a result of exposure to the pheromone-laden urine of a sexually mature (dominant) male mouse.
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Wagner's mustached bat
Wagner's mustached bat (Pteronotus personatus) is a bat species from South and Central America.
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Walrus
The walrus (Odobenus rosmarus) is a large flippered marine mammal with a discontinuous distribution about the North Pole in the Arctic Ocean and subarctic seas of the Northern Hemisphere.
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Water buffalo
The water buffalo (Bubalus bubalis) or domestic Asian water buffalo is a large bovid originating in South Asia, Southeast Asia, and China.
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Water deer
The water deer (Hydropotes inermis) is a small deer superficially more similar to a musk deer than a true deer.
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Waterbuck
The waterbuck (Kobus ellipsiprymnus) is a large antelope found widely in sub-Saharan Africa.
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West Indian manatee
The West Indian manatee (Trichechus manatus) or "sea cow", also known as American manatee, is the largest surviving member of the aquatic mammal order Sirenia (which also includes the dugong and the extinct Steller's sea cow).
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Western jumping mouse
The western jumping mouse (Zapus princeps), is a species of rodent in the family Dipodidae.
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White-tailed deer
The white-tailed deer (Odocoileus virginianus), also known as the whitetail or Virginia deer, is a medium-sized deer native to the United States, Canada, Mexico, Central America, and South America as far south as Peru and Bolivia.
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Whitten effect
The Whitten effect occurs when male pheromones stimulate synchronous estrus in a female population.
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Wild boar
The wild boar (Sus scrofa), also known as the wild swine,Heptner, V. G.; Nasimovich, A. A.; Bannikov, A. G.; Hoffman, R. S. (1988), Volume I, Washington, D.C.: Smithsonian Institution Libraries and National Science Foundation, pp.
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Wildcat
The wildcat is a small cat species complex comprising ''Felis silvestris'' and the ''Felis lybica''.
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Wildebeest
The wildebeests, also called gnus, are a genus of antelopes, scientific name Connochaetes.
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Wildlife of the Central African Republic
Wildlife in the Central African Republic is in the vast natural habitat located between the Congo Basin's rain forests and large savannas, where the human density was smaller than 0.5 per km2 prior to 1850.
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Wolfdog
A wolfdog (also called a wolf–dog hybrid or wolf hybrid) is a canid hybrid resulting from the hybridization of a domestic dog (Canis lupus familiaris) to one of four other Genus Canis taxa, the gray (Canis lupus), eastern timber (Canis lycaon), red (Canis rufus), or ethiopian (Canis simensis).
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Wrinkle-faced bat
The wrinkle-faced bat (Centurio senex) is a species of bat in the family Phyllostomidae and the only identified member of the genus Centurio.
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Yellow-pine chipmunk
The yellow-pine chipmunk (Tamias amoenus) is a species of order Rodentia in the family Sciuridae.
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Yellow-throated marten
The yellow-throated marten (Martes flavigula) is an Asian marten species, which is listed as Least Concern on the IUCN Red List due to its wide distribution, evidently relatively stable population, occurrence in a number of protected areas, and lack of major threats.
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Zanzibar red colobus
The Zanzibar red colobus (Procolobus kirkii) is a species of red colobus monkey endemic to Unguja, the main island of the Zanzibar Archipelago, off the coast of Tanzania.
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Anestri, Anestrus, Anoestrus, Covert menstruation, Diestrus, Dioestrus, Estrous, Estrous cycles, Estrum, Estrus, Estrus cycle, Estrus period, Estrus phase, In heat, Metestrus, Metoestrus, Metstrus, Monoestrous, OEstrus, Oestrous, Oestrous cycle, Oestrous cycles, Oestrus, Oestrus cycle, Oestrus cycles, On heat, Ostrus, Polyestrous, Polyoestrous, Postestrum, Postoestrus, Postpartum estrus, Postpartum oestrus, Pro-oestrus, Proestrum, Proestrus, Prooestrus, Receptive to breeding, Receptive to mating, Reproductive season, Sexual receptiveness, Sexual receptivity, Sexually receptive, Œstrus.
References
[1] https://en.wikipedia.org/wiki/Estrous_cycle
