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Influence of Selected Hook and Lure Types on Catch, Size, and Mortality of Commercially Troll‐Caught Chinook Salmon
Author(s) -
Orsi Joseph A.,
Wertheimer Alex C.,
Jaenicke Herbert W.
Publication year - 1993
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8675(1993)013<0709:ioshal>2.3.co;2
Subject(s) - chinook wind , oncorhynchus , fishery , hook , fish measurement , biology , fish <actinopterygii> , medicine , dentistry
Circle and J hooks of two sizes, plugs of two sizes, hootchies, and painted spoons were tested to determine their relationship to hook‐and‐release mortality of Chinook salmon Oncorhynchus tshawytscha . Fewer Chinook salmon and adult coho salmon O. kisutch were caught with circle hooks than with J hooks. Large J hooks caught more large Chinook salmon than did small J hooks, but the difference was not significant ( P = 0.10). Large plugs caught significantly ( P < 0.05) larger Chinook salmon and fewer coho salmon and sublegal (<66 cm fork length) Chinook salmon than other lures tested. Wound distribution on Chinook salmon varied ( P < 0.05) with hook type; circle hooks lodged in the periphery of the mouth more frequently than did J hooks. Results indicate that, in a directed coho salmon troll fishery, the use of circle hooks could reduce incidental mortality of Chinook salmon but would substantially reduce coho salmon catch rate. In a quota‐limited Chinook salmon fishery, large plugs could be used to harvest larger fish selectively, thereby reducing encounters with sublegal fish.