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
Campolina retilineo or straight region of the nasal bones as in image presented below. In the new ideal, male nasal bones are prominent, retain the height of the earlier ideals but are now expected to generate a smooth 'curved and continuous' appearance (see The desired head shape of a Campolina). The ideal for the profile of the female head is more dynamic with a narrowing between the nasal bones to refine the lower face. The curvature of the nasal bones should appear to extend naturally from the intersection of the orbit and maxillary and lead gently into the muzzle. Both male