Is there genetic variation in the response to competition intensity in juvenile brown trout Salmo trutta?
Article first published online: 10 JAN 2011
© 2011 The Authors. Journal of Fish Biology © 2011 The Fisheries Society of the British Isles
Journal of Fish Biology
Volume 78, Issue 2, pages 635–646, February 2011
How to Cite
Robertsen, G., Kvingedal, E. and Einum, S. (2011), Is there genetic variation in the response to competition intensity in juvenile brown trout Salmo trutta?. Journal of Fish Biology, 78: 635–646. doi: 10.1111/j.1095-8649.2010.02886.x
- Issue published online: 2 FEB 2011
- Article first published online: 10 JAN 2011
- (Received 4 June 2010, Accepted 15 November 2010)
- density dependence;
- environmental heterogeneity;
- genotypic selection;
- intraspecific competition;
Effects of intraspecific competition intensities on the relative performance (growth and movement) of juvenile brown trout Salmo trutta originating from nine different families were tested in tank experiments and in semi-natural streams. Both growth and movement differed consistently among families, indicating genetic variation in these traits. There were no significant interaction effects, however, between the intensity of competition and family origin on performance in either of the two experimental systems. Thus, genetic variation in response to competition intensity appeared to be limited in the population from which the juveniles used in this experiment originate.