ANSC 1001 Chapter Notes - Chapter 1: Arteriosclerosis, Antithrombin, Soil Fertility
Document Summary
Domestication means selectively breeding for human use. The domestication of horses transformed the range of land movement for human beings. Chickens are most numerous (20. 7 billion), cattle (1. 43 billion), sheep (1. 09 billion), ducks (1. 08 billion), swine (967 million) Domestication timeline: dogs (12000 years ago), sheep, goats, pigs (9000-7000bc), cattle/buffalo for draft (4000bc), horses/donkeys (3000 bc), poultry (2000 bc), turkeys (14th cent. ) Contribution of animal products to per-capita calorie and protein supply: world average- animal products constitute 16% of calories, 37% of the protein, 45% of fat in total world food supply. 41% of fat from animal products: u. s ranks higher than world average for % of calories & protein from animal sources; about average % of fat from animal products. Per-capita caloric supplies of calories & proteins (contribution to animal products) have increased in the world: differences among countries in importance of animal products in food supply partially expl.
