pus840
发表于 2025-3-23 11:49:48
Food and Populationsdifferent body sizes and food requirements. The adequacy of food supplies for any group of animals in the wild or in captivity depends on the number of animals and their demands for energy and nutrients in the prevailing environmental conditions. A small fraction of the energy available in a populat
Nonflammable
发表于 2025-3-23 14:04:41
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委屈
发表于 2025-3-23 19:11:35
Measuring Food Consumptionke must be made with the animals in steady state. The time to reach steady state when transferred to a new diet or environment depends on several factors, including the complexity of the digestive tract, and rates of feeding and digesta turnover..Techniques to measure food intake can be either direc
AVERT
发表于 2025-3-23 22:14:41
Digestive Functionficiency of digesting food (i.e., digestibility) depends on both the quality of the food and the digestive function of the consumer. Digestibility determines how much of a food will be needed to meet the animal’s energy and nutrient requirements for maintenance and production. Functional diet breadt
disparage
发表于 2025-3-24 04:31:32
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油毡
发表于 2025-3-24 08:07:42
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Armory
发表于 2025-3-24 11:38:52
Nitrogenous Substrates: Nucleic Acids to Amino Excretionthe structure and function of animals. Proteins consist of 20 common amino acids, of which approximately half cannot be synthesized by the animal and so must be supplied by the diet or by microbial synthesis in the digestive tract. The quality of food protein is therefore determined by its amino aci
Omniscient
发表于 2025-3-24 16:35:10
Metabolic Constituents: Water, Minerals and Vitaminseys, urinary bladders and the digestive tract. The body water pool can be maintained by a wide range of complementary influxes (free water, preformed water in food, metabolic water produced from chemical reactions) and effluxes (excreta, respiratory and cutaneous water losses). Water requirements va
PHONE
发表于 2025-3-24 22:06:42
Energy: Carbon as a Fuel and a Tissue Constituentss, digestible, metabolizable and net energy. Energy expenditure can be measured using calorimetry with captive animals or with the doubly labeled water technique in free-living animals. Animals vary in their basal metabolic rate (BMR), maintenance requirements (up to 2 × BMR), and the additional re
Entrancing
发表于 2025-3-25 01:36:38
Integrating Nutrient Supply and Demand in Variable Environmentsct the entire food web and the structure of animal and plant communities. This book began with two questions that confront wildlife biologists:.The approaches used in the book emphasize the importance of the energy and nutrient requirements of a species to complete its life cycle, and therefore of a