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Development and evaluation of a bioenergetics model for bull trout

Transactions of the American Fisheries Society

By:
, , , ,
DOI: 10.1080/00028487.2012.720628

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Abstract

We conducted laboratory experiments to parameterize a bioenergetics model for wild Bull Trout Salvelinus confluentus, estimating the effects of body mass (12–1,117 g) and temperature (3–20°C) on maximum consumption (C max) and standard metabolic rates. The temperature associated with the highest C max was 16°C, and C max showed the characteristic dome-shaped temperature-dependent response. Mass-dependent values of C max (N = 28) at 16°C ranged from 0.03 to 0.13 g·g−1·d−1. The standard metabolic rates of fish (N = 110) ranged from 0.0005 to 0.003 g·O2·g−1·d−1 and increased with increasing temperature but declined with increasing body mass. In two separate evaluation experiments, which were conducted at only one ration level (40% of estimated C max), the model predicted final weights that were, on average, within 1.2 ± 2.5% (mean ± SD) of observed values for fish ranging from 119 to 573 g and within 3.5 ± 4.9% of values for 31–65 g fish. Model-predicted consumption was within 5.5 ± 10.9% of observed values for larger fish and within 12.4 ± 16.0% for smaller fish. Our model should be useful to those dealing with issues currently faced by Bull Trout, such as climate change or alterations in prey availability.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Development and evaluation of a bioenergetics model for bull trout
Series title:
Transactions of the American Fisheries Society
DOI:
10.1080/00028487.2012.720628
Volume
142
Issue:
1
Year Published:
2013
Language:
English
Publisher:
Taylor & Francis
Contributing office(s):
Western Fisheries Research Center
Description:
9 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
41
Last page:
49