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.
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: |
|Journal or Publication Title: ||Marine Fisheries Review|
|Page Range: ||pp. 28-35|
|Item ID: ||9942|
|Depositing User: ||Patti M. Marraro|
|Date Deposited: ||22 Aug 2012 15:42|
|Last Modified: ||22 Aug 2012 15:42|
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