High frequency of natural hybrids between Atlantic salmon, Salmo salar L., and brown trout, S. trutta L., in a Swedish river

• Published in: Journal of Fish Biology
• Main Authors: Jansson, H., Holmgren, I., Wedin, K., Anderson, T.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1991
• Subjects: Atlantic salmon; Salmo salar
• Online Access: http://dx.doi.org/10.1111/j.1095-8649.1991.tb05096.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1991.tb05096.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1991.tb05096.x

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.