ANSC 3180 Lecture 7: Wildlife Nutrition
6 Feb 2019
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Energy review: 1 calorie (cal), heat energy needed to raise the temperature of 1g of water from 14. 5"c to 15. 5. The metabolic rate of a homeothermic animal: 2. in a post-absorptive state (no longer metabolizing feed) when: Shrews, less than 2 hours after eating. Small animals & birds, 3 - 6 hours. Some rodents & small birds (white-crowned sparrow), become hyperactive. 3. in a thermoneutral environment (tnz, tcz) Bmr not the lowest metabolic rate, lower: Starvation (prolonged, slow weight loss with fat as major energy source) Early estimate (kleiber 1947), mammals (mouse -> elephant) Y = 70 x0. 75 where: y is bmr (kcal/day) Bmr correlates more closely with bodyweight0. 75 (x0. 75) than with bodyweight (x) 0. 1 kg animal, bmr 12. 4 kcal/day (124 kcal/kg) 10 kg animal, bmr 394 kcal/day (39. 4 kcal/kg) does not need x100 bmr, 1240 kcal/day. 100 kg animal does not need twice as much energy as a 50 kg animal.
