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Migration performance of wild and hatchery sea trout (Salmo trutta L.) smolts: implications for compensatory hatchery programs
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Umeå University, Faculty of Science and Technology, Umeå Marine Sciences Centre (UMF). (UMFpub)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2009 (English)In: Fisheries Research, ISSN 0165-7836, E-ISSN 1872-6763, Vol. 9, no 3, 210-215 p.Article in journal (Refereed) Published
Abstract [en]

Migration success of hatchery-reared and wild sea trout smolts through the lower stretches and the estuary of a Baltic Sea river were studied. During 3 years, wild and hatchery trout smolts were implanted with acoustic transmitters and released 14 km upstream from the river mouth. In order to monitor their out-migration pattern, acoustic receivers were deployed along the migratory route. Data on number of fish detected and date and time of detections were analysed and the migratory performance of wild and hatchery-reared fish was compared. A significantly higher proportion of wild fish (80%) successfully migrated to the coast compared to fish of hatchery origin (27.5%) and migration was faster in wild smolts. Hatchery fish were larger and had a higher condition factor and lipid concentrations, which are proposed as possible reasons for the poorer migratory performance of the hatchery-reared fish.

Place, publisher, year, edition, pages
2009. Vol. 9, no 3, 210-215 p.
Keyword [en]
Brown trout; Survival; Lipid concentration; Predation; Telemetry
National Category
Zoology
Identifiers
URN: urn:nbn:se:umu:diva-25973DOI: 10.1016/j.fishres.2009.06.004OAI: oai:DiVA.org:umu-25973DiVA: diva2:235501
Available from: 2009-09-16 Created: 2009-09-16 Last updated: 2017-10-24Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
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  • nn-NB
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Output format
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  • asciidoc
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