UA ECOL 482 - Bioenergetics Model (4 pages)

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Bioenergetics Model



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Bioenergetics Model

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Pages:
4
School:
University of Arizona
Course:
Ecol 482 - Ichthyology

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Bioenergetics Model Modeling Strategy Consumption Metabolism Respiration Wastes Excreted Growth Production C M W G Bioenergetics Model Consumption Metabolism Wastes Growth For Carnivores 100 44 27 29 For Herbivores 100 37 43 20 What can we see 1 Herbivores have lower growth rates and higher waste loss rates makes sense 2 Both fishes have higher rates of growth efficiency than birds and mammals Bioenergetics Model Answer questions about factors that constrain growth diet quality or environmental stressors use measured growth to estimate how much of an effect a predator has had on a population Bioenergetics Model Further Breakdown Core Processes in Bioenergetics Energy Mass Balance Equation Consumption Metabolism Respiration Wastes Growth C R W G C respiration active metabolism SDA specific dynamic action W egestion excretion G somatic growth gonad production repairs C R A S F U B G 1 Bioenergetics Model Repeat Metabolism respiration active metabolism SDA specific dynamic action Waste egestion excretion Growth somatic growth gonad production repairs C R A S F U B G Bioenergetics Model Nuts and Bolts Respiration amount of energy used for routine metabolism Dependent on fish size water temperature and activity Bioenergetics Model Bioenergetics Model Nuts and Bolts Consumption proportion of the maximum daily ration for a fish at a particular mass and temperature g prey per g body mass per day Allometric function of mass from ad libitum feeding experiments at optimum temperatures Nuts and Bolts Waste Losses Egestion fecal waste and Excretion nitrogenous waste constant proportion of consumption or as functions dependent on water temperature and consumption 2 Bioenergetics Model Nuts and Bolts Growth Reproduction gonads produced during normal growth loss occurs at spawning Bioenergetics Model Nuts and Bolts Predator Energy Density joules per gram wet mass Scaling from Individuals to Populations Bioenergetics Model Nuts and Bolts Cohort as a Population Cohort group of



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