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Item title: Energy Use, Migration Times, And Spawning Success Of Adult Spring–Summer Chinook Salmon Returning To Spawning Areas In The South Fork Salmon River In Central Idaho: 2002–2007
Report type: Technical Report
Date: 2008
Authors: Mann, R.D.; Peery, C.A.; Pinson, A.M.; Anderson, C.R.
Affiliations: Fish Ecology Research Lab, University of Idaho
Report number: 2009-4
Publisher: University of Idaho
Funder: U.S. Army Corps of Engineers, Portland District; U.S. Army Corps of Engineers, Walla Walla District; Bonneville Power Administration
Abstract: The accuracy and feasibility of multiple methods for determining energy condition in Chinook salmon were determined. These results were compared to proximate analysis of fish tissues, which represented the true value of energy content for these fish. Although all estimate methods produced results that were significantly correlated with proximate analysis, bioelectrical impedance and condition factor were less accurate than morphometrics and the Distell Fatmeter. Bioelectrical impedance did not seem to be as accurate in salmon as with other fish species, and is generally considered of better use for mammals. Although condition factor was included as a factor in many models to predict energy condition, its lipid estimation qualities by itself are suboptimal. From a series of 12 morphometric measures, breadth at anus, hump height and mideye to hyperal length together provided the best method for determining lipid content. These three measures were used in subsequent years. Although morphometrics proved to be the most accurate method for estimating energy condition, the Distell Fatmeter was also accurate, and had the added benefit of a reduced handling time. Either of these two methods are recommended to be used in further research when a quick and accurate measure of lipid content is needed.
Species: Chinook salmon, Oncorhynchus tshawytscha
Concepts: salmonids; Federal Columbia River Power System; FCPRS; radiotelemetry; migration; PIT tags; passage behavior; bioenergetics; condition; reproduction
Location: South Fork Salmon River; Columbia River; Lower Snake River
Source: University of Idaho, Fish Ecology Research Lab
Type: Text
Format: application/pdf
Rights: These files are provided for research purposes with copyright held by the original authors. Please contact the publishing organization for more information about rights.
Digital identifier: ferl-tr-2009-4
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