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Development and Evaluation of a Bioenergetics Model for Bull Trout
Author(s) -
Mesa Matthew G.,
Weiland Lisa K.,
Christiansen Helena E.,
Sauter Sally T.,
Beauchamp David A.
Publication year - 2013
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1080/00028487.2012.720628
Subject(s) - trout , bioenergetics , fish <actinopterygii> , zoology , biology , salvelinus , fishery , biochemistry , mitochondrion
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·O 2 ·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.