11:067:330 Lecture Notes - Lecture 6: Energy Economics, Victorian Football League, Rumen
21 Jul 2017
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Energy balance difference between e intake and e expenditure. Receptors in gut, liver, and cns send info about e balance to hypothalamus. Ht integrates info and determines if animal is in positive or negative. + decrease feed intake / increase e expenditure. Increase feed intake / decrease e expenditure. Long term regulation of e balance achieved by short term regulation of feed intake and meal eating. Since feed intake is regulated in short term, it"s under homeostatic control. Homeostasis maintenance of physiological equilibrium in internal environment. Growth positive e balance: extra e used to deposit body tissue. Losing weight negative e balance (usually not good for productivity) Monogastrics (simple-stomached) fed medium to high e diets negative relationship between intake and dietary e content. Animals regulate their intake and consume only what"s needed. Ruminants / large herbivores fed diets with wider range of e concentration more complex relationship. Certain amount of mcal needed per day: once reached, relationship resembles monogastrics".
