Animal genetic resources for food and agriculture of animal genetic resources includes diversity at species, breed and within-breed level. Known are currently 8,800 different breeds of birds and mammals within 38 species used for food and agriculture. The main animal species used for food and agriculture production are cattle, sheep, goats, chickens and pigs. In the livestock world, these species are often referred to as "the big five". Some less-utilized species include the dromedary, donkey, bactrian camel, buffalo, guinea pig, horse, rabbit, yak, goose, duck, ostrich,partridge, pheasant, pigeon, and turkey. The history of animal genetic resources begins about 12,000 to 14,000 years ago. The domestication of major
Tame animal Tame animal A tame animal is an animal that is relatively tolerant of human presence. Tameness may arise either naturally (as in the case, for example, of island tameness) or due to human intervention (as the result of animal training). Taming is the deliberate, human-directed process of training an animal against its initially wild or natural instincts to avoid or attack humans, so that it instead learns to become tolerant of humans. The tameability of an animal is the level of ease it takes humans to train the animal. Tameability may vary among individual animals, breeds, or species. In other