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Animal Science Exam 1
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“When tillage begins, the other arts follow. The farmers, therefore, are the founders of civilization.”
Daniel Webster 1840
“When tillage begins, the other arts follow. The farmers, therefore, are the founders of . . .”
civilization
Why Domesticate?
dependable food source
greater abundance/herd size
safer
less time (EFFICIENCY)
extent of use is ____ related to the standard of living
directly
animals utilize ____ we cannot
feeds
What are the basic forms of energy?
sugar,starch, and cellulose
Humans can’t digest . . .
cellulose
______ trapped as cellulose
50% of solar energy
_____ can be used ONLY by ruminants (grazing)
40% of world’s ag land
Feed to Gain Ratio (or feed efficiency)
Lbs of feed/lbs of gain
Beef - F/G =
8:1
Swine - F/G =
3-3.5:1
Poultry - F/G =
2:1
Fish — F/G = 1.5:1