Measurements of Growth and Consumption of Sauger (Stizostedion canadense): Implication for Fish Energetics Studies

Autor:	Richard B. McLean, Joseph W. Minton
Rok vydání:	1982
Předmět:	Consumption (economics) biology Ecology Stizostedion Energetics Aquatic Science Energy budget High food biology.organism_classification Animal science Energy equation Environmental science Fish Specific dynamic action Ecology Evolution Behavior and Systematics
Zdroj:	Canadian Journal of Fisheries and Aquatic Sciences. 39:1396-1403
ISSN:	1205-7533 0706-652X
DOI:	10.1139/f82-188
Popis:	The energy budget of sauger (Stizostedion canadense), in Watts Bar Reservoir, Tennessee, was studied over a 17-mo period. Field determinations of consumption and laboratory determinations of metabolism were incorporated into the balanced energy equation of Winberg to predict growth in energy value of sauger in age-classes I+ and II+. The equation included energetic costs of specific dynamic action and the metabolic efficiency penalty of metabolizing body energy stores. Observed and predicted growth during the warm months, March through October, agreed within 2.5–9.6% for the I+ and II+ age-classes, respectively. Observed and predicted growth over the winter for the only age-class modeled, the I+, did not agree. High food consumption during winter did not result in the amount of growth expected, suggesting that the physiological assumptions of the balanced energy equation are invalid for describing the winter energetics of sauger. We emphasize the potential error in inferring consumption from growth and metabolism.Key words: sauger, Stizostedion, bioenergetics, feeding, growth, modeling
Databáze:	OpenAIRE
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