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Migration and Survival of Redfish Lake, Idaho, Sockeye Salmon, Oncorhynchus nerka

1968; Wiley; Volume: 97; Issue: 4 Linguagem: Inglês

10.1577/1548-8659(1968)97[360

1548-8659

T. C. Bjornn, Donovan R. Craddock, D. R. Corley,

Marine and fisheries research

Transactions of the American Fisheries SocietyVolume 97, Issue 4 p. 360-373 Article Migration and Survival of Redfish Lake, Idaho, Sockeye Salmon, Oncorhynchus nerka T. C. Bjornn, T. C. Bjornn Idaho Cooperative Fishery Unit, University of Idaho, Moscow, Idaho, USASearch for more papers by this authorD. R. Craddock, D. R. Craddock Bureau of Commercial Fisheries, Biological Laboratory, Seattle, Washington, USASearch for more papers by this authorD. R. Corley, D. R. Corley Idaho Fish and Game Department, Salmon, Idaho, USASearch for more papers by this author T. C. Bjornn, T. C. Bjornn Idaho Cooperative Fishery Unit, University of Idaho, Moscow, Idaho, USASearch for more papers by this authorD. R. Craddock, D. R. Craddock Bureau of Commercial Fisheries, Biological Laboratory, Seattle, Washington, USASearch for more papers by this authorD. R. Corley, D. R. Corley Idaho Fish and Game Department, Salmon, Idaho, USASearch for more papers by this author First published: October 1968 https://doi.org/10.1577/1548-8659(1968)97[360:MASORL]2.0.CO;2Citations: 24AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Most adult sockeye salmon returning to Redfish Lake had spent two years in the ocean. Survival from smolt to returning adult at the lake ranged from 0.14 to 1.83%. The sex-ratio was nearly even. Survival of sockeye in the lake from potential egg deposition to smolt migration was usually less than 6%. In at least one year, smolts originating from kokanee and/or residual sockeye may have comprised a large proportion of the migration. There was little relationship between egg deposition and smolts produced. Sockeye salmon smolts migrated from Redfish Lake primarily from 1800 to 2400 hr. There was no consistent relationship between seasonal timing of the migration, lake ice cover, temperatures or flow of the outlet stream. The role of photoperiod in timing of the migration and the parr-smolt transformation is unclear. Growth of juvenile sockeye in the lake was inversely related to population density and age at migration was dependent upon first year growth in the lake. More than half the fish of a year class migrated as yearlings when their mean length was more than 85 mm. When the mean length of yearlings was less than 85 mm less than half the fish of a year class migrated as yearlings. Citing Literature Volume97, Issue4October 1968Pages 360-373 RelatedInformation