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Salmonid Flexibility: Responses to Environmental Extremes

1994; Wiley; Volume: 123; Issue: 4 Linguagem: Catalão

10.1577/1548-8659(1994)123 2.3.co;2

1548-8659

C. Andrew Dolloff, Patricia A. Flebbe, John E. Thorpe,

Genetic diversity and population structure

Transactions of the American Fisheries SocietyVolume 123, Issue 4 p. 606-612 Article Salmonid Flexibility: Responses to Environmental Extremes C. Andrew Dolloff, C. Andrew Dolloff Scottish Office Agriculture and Fisheries Department, Freshwater Fisheries Laboratory, Pitlochry, Scotland, PH16 5LB UKSearch for more papers by this authorPatricia A. Flebbe, Patricia A. Flebbe Scottish Office Agriculture and Fisheries Department, Freshwater Fisheries Laboratory, Pitlochry, Scotland, PH16 5LB UKSearch for more papers by this authorJohn E. Thorpe, John E. Thorpe Scottish Office Agriculture and Fisheries Department, Freshwater Fisheries Laboratory, Pitlochry, Scotland, PH16 5LB UKSearch for more papers by this author C. Andrew Dolloff, C. Andrew Dolloff Scottish Office Agriculture and Fisheries Department, Freshwater Fisheries Laboratory, Pitlochry, Scotland, PH16 5LB UKSearch for more papers by this authorPatricia A. Flebbe, Patricia A. Flebbe Scottish Office Agriculture and Fisheries Department, Freshwater Fisheries Laboratory, Pitlochry, Scotland, PH16 5LB UKSearch for more papers by this authorJohn E. Thorpe, John E. Thorpe Scottish Office Agriculture and Fisheries Department, Freshwater Fisheries Laboratory, Pitlochry, Scotland, PH16 5LB UKSearch for more papers by this author First published: July 1994 https://doi.org/10.1577/1548-8659(1994)123 2.3.CO;2Citations: 21AboutPDF 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 onFacebookTwitterLinked InRedditWechat Abstract The responses of salmonid fishes to the problems posed by marginal habitats are genetic exercises in population insurance. The costs increase as the risks increase, but the risks are met by a wide repertoire of biological capacities. The most general proximate response to adversity is behavioral: Ontogenetic niche shifts are an acknowledgment that a series of environments becomes marginal for all salmonids during development. Physiological tolerances and developmental flexibility govern the timing of these movements. Such shifts are the product of natural selection in relatively predictable environments, but less predictable or catastrophic events are accommodated at a different genetic level. Low spatial flexibility is counteracted by temporal insurance, and vice versa. Thus, high homing precision is coupled with complex multiple-age structures, and simple age structuring is coupled with relatively high spatial straying. Citing Literature Volume123, Issue4July 1994Pages 606-612 RelatedInformation