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Reevaluation of a walleye (Sander vitreus) bioenergetics model

Fish Physiology and Biochemistry

By:
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DOI: 10.1007/s10695-012-9737-7

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Abstract

Walleye (Sander vitreus) is an important sport fish throughout much of North America, and walleye populations support valuable commercial fisheries in certain lakes as well. Using a corrected algorithm for balancing the energy budget, we reevaluated the performance of the Wisconsin bioenergetics model for walleye in the laboratory. Walleyes were fed rainbow smelt (Osmerus mordax) in four laboratory tanks each day during a 126-day experiment. Feeding rates ranged from 1.4 to 1.7 % of walleye body weight per day. Based on a statistical comparison of bioenergetics model predictions of monthly consumption with observed monthly consumption, we concluded that the bioenergetics model estimated food consumption by walleye without any significant bias. Similarly, based on a statistical comparison of bioenergetics model predictions of weight at the end of the monthly test period with observed weight, we concluded that the bioenergetics model predicted walleye growth without any detectable bias. In addition, the bioenergetics model predictions of cumulative consumption over the 126-day experiment differed fromobserved cumulative consumption by less than 10 %. Although additional laboratory and field testing will be needed to fully evaluate model performance, based on our laboratory results, the Wisconsin bioenergetics model for walleye appears to be providing unbiased predictions of food consumption.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Reevaluation of a walleye (Sander vitreus) bioenergetics model
Series title:
Fish Physiology and Biochemistry
DOI:
10.1007/s10695-012-9737-7
Volume
39
Issue:
4
Year Published:
2013
Language:
English
Publisher:
Springer
Contributing office(s):
Great Lakes Science Center
Description:
6 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
749
Last page:
754
Number of Pages:
6