Size-related Hooking Mortality of Incidentally Caught Chinook Salmon, Oncorhynchus tshawytscha

Wertheimer, Alex and Celewycz, Adrian and Jaenicke, Herbert and Mortensen, Donald (1989) Size-related Hooking Mortality of Incidentally Caught Chinook Salmon, Oncorhynchus tshawytscha. Marine Fisheries Review, 51(2), pp. 28-35.

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Abstract

Mortality associated with the incidental catch and release by commercial trollers of two size classes of chinook salmon, Oncorhynchus tshawytscha, was assessed. Observed cumulative mortality 4-6 days after hooking was 18.3 percent for sublegal-sizefish « 66 cm FL) and 19.0 percent for legal-sizefish. Size of fish was not significantly related to mortality; however, when the results were combined with data from a previous experiment, there was a significant inverse relationship between fish length and mortality. Hooking mortality estimates calculated from tagging experiments and observed relative mortality of legal-and sublegal-size fish held in net pens, were used to derive a range for total hooking mortality of 22.0-26.4 percent for sublegal-size chinook salmon and 18.5-26.4 percent for legal-size chinook salmon.

Item Type: Article
Title: Size-related Hooking Mortality of Incidentally Caught Chinook Salmon, Oncorhynchus tshawytscha
Personal Creator/Author:
CreatorsEmail
Wertheimer, Alex
Celewycz, Adrian
Jaenicke, Herbert
Mortensen, Donald
Refereed: Yes
Journal or Publication Title: Marine Fisheries Review
Volume: 51
Number: 2
Page Range: pp. 28-35
Date: 1989
ISSN: 0090-1830
Subjects: Fisheries
Management
Item ID: 9942
Depositing User: Patti M. Marraro
Date Deposited: 22 Aug 2012 13:42
Last Modified: 22 Aug 2012 13:42
URI: http://aquaticcommons.org/id/eprint/9942

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