High frequency of natural hybrids between Atlantic salmon, Salmo salar L., and brown trout, S. trutta L., in a Swedish river |
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Authors: | H Jansson I Holmgren K Wedin T Anderson |
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Institution: | Salmon Reseurch Institute, S-810 70 Älvkarleby, Sweden |
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Abstract: | Among 332 parr from the Swedish River Grönån examined by electrophoresis, 44 (13%) were hybrids between Atlantic salmon and brown trout. The hybrid frequencies in three sections of Grönån were significantly different (23. 8 and 2%). All hybrids are evidently of natural origin. and possible factors promoting hybridization are irregular overlapping spawning times. lack of separate spawning grounds, and involvement of sneakers. |
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Keywords: | natural hybridization Atlantic salmon brown trout |
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