Development and Laboratory Evaluation of a Bioenergetics Model for Subadult and Adult Smallmouth Bass

Abstract A previously developed bioenergetics model for smallmouth bass Micropterus dolomieu (Hewett and Johnson 1992) was originally constructed with data exclusively from age-0 fish but has since been used to predict growth and food consumption for both age-0 and older fish, including adults. We developed a bioenergetics model for subadult and adult smallmouth bass and compared the abilities of the two models to predict growth and food consumption for fish weighing from 100 to 270 g. Model-independent laboratory growth and food consumption data for individual subadult and adult fish were used to evaluate the performance of both models. Experimental fish were subjected to three consecutive 3-week feeding regimes: an ad libitum ration at 22°C, a ration of 2.5% wet body weight/d at 22°C, and a ration of 2% wet body weight/d at 27°C. Overall, the bioenergetics model developed for subadult/adult smallmouth bass produced significantly greater accuracy in estimates of relative growth rate and cumulative consum...

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