Marine Vertical Distribution of Juvenile Chinook and Coho Salmon in Southeastern Alaska
- 1 March 1995
- journal article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 124 (2) , 159-169
- https://doi.org/10.1577/1548-8659(1995)124<0159:mvdojc>2.3.co;2
Abstract
Vertical distributions of chinook salmon Oncorhynchus tshawytscha of marine ages x.0, x.1, and x.2 and coho salmon O. kisutch of age x.0 are reported for the marine waters of southeastern Alaska. (The number or letter preceding the decimal point indicates number of winters spent in freshwater, that following the decimal point indicates winters spent in salt water.) Understanding vertical distribution of prerecruit salmon may be useful in minimizing fishery bycatch. Salmon were caught to a depth of 36.6 m from chartered commercial power trollers fishing small hooks and lures. Sampling occurred throughout inside waters of the Alexander Archipelago and adjacent coastal waters during September 1986 and in inside waters near Ketchikan during February, May, and September 1987. Vertical distribution of salmon differed significantly by species and age-group: in September, age-x.0 coho salmon (mean fork length, 28.4 cm) were caught shallower than age-x.0 chinook salmon (27.3 cm); age-x.1 (44.2 cm) and age...Keywords
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