Effects of starvation on energy density of juvenile chum salmon (Oncorhynchus keta) captured in marine waters of Southeastern Alaska

Ferguson , Emily A. and Sturdevant, Molly V. and Orsi, Joseph A. (2010) Effects of starvation on energy density of juvenile chum salmon (Oncorhynchus keta) captured in marine waters of Southeastern Alaska. Fishery Bulletin, 108(2), pp. 218-225.

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Official URL: http://fishbull.noaa.gov/1082/fergusson.pdf

Abstract

We conducted laboratory starvation experiments on juvenile chum salmon (Oncorhynchus keta) captured in the neritic marine waters of northern Southeast Alaska in June and July 2003. Temporal changes in fish energy density (whole body energy content [WBEC], cal/g dry weight), percent moisture content, wet weight (g), length (mm), and size-related condition residuals were measured in the laboratory and were then compared to long-term field data. Laboratory water temperatures and salinities averaged 9°C and 32 psu in both months. Trends in response variables were similar for both experimental groups, although sampling intervals were limited in July because fewer fish were available (n= 54) than in June (n=101). Overall, for June (45-d experimental period, 9 intervals), WBEC, wet weight, and condition residuals decreased and percent moisture content increased, whereas fork length did not change. For July (20-d experimental period, 5 intervals), WBEC and condition residuals decreased, percent moisture content and fork length increased, and wet weight did not change. WBEC, percent moisture content, and condition residuals fell outside the norm of longterm data ranges within 10–15 days of starvation, and may be more useful than fork length and wet weight for detecting fish condition responses to suboptimal environments.

Item Type: Article
Title: Effects of starvation on energy density of juvenile chum salmon (Oncorhynchus keta) captured in marine waters of Southeastern Alaska
Personal Creator/Author:
CreatorsEmail
Ferguson , Emily A.
Sturdevant, Molly V.
Orsi, Joseph A.
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 108
Number: 2
Page Range: pp. 218-225
Date: 2010
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8759
Depositing User: Patti M. Marraro
Date Deposited: 11 Jun 2012 18:32
Last Modified: 11 Jun 2012 18:32
URI: http://aquaticcommons.org/id/eprint/8759

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