Migratory behaviour of brown trout, Salmo trutta L: importance of genetic and environmental influences
Abstract Lake Storvindeln in northern Sweden supports a population of fast‐growing lake‐run brown trout. Spawning and early rearing take place in the River Vindelälven, while most growth occurs in the lake (piscivory). A smaller tributary to the lake, Låktabäcken Creek, holds a resident, early matur...
| Published in: | Ecology of Freshwater Fish |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
1993
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| Online Access: | http://dx.doi.org/10.1111/j.1600-0633.1993.tb00083.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.1993.tb00083.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.1993.tb00083.x |
| Summary: | Abstract Lake Storvindeln in northern Sweden supports a population of fast‐growing lake‐run brown trout. Spawning and early rearing take place in the River Vindelälven, while most growth occurs in the lake (piscivory). A smaller tributary to the lake, Låktabäcken Creek, holds a resident, early maturing, short‐lived brown trout population, although no migratory barriers have existed since 1947. To establish a lake‐run trout population, fry from the migratory R. Vindelälven stock were introduced into the creek during 1985–1991. Introduced trout descended to the lake prior to maturing. As a result of the introduction, large adult trout returned from L. Storvindeln to the creek to spawn in 1991 and 1992; i. e., the introduced trout were able to complete a migratory life cycle. Genetic factors appeared to have a primary influence on the predisposition to migrate in this case, and it is suggested that migratory populations rarely develop from strictly resident ones. |
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