Effects of Two Insecticides on the Vulnerability of Atlantic Salmon ( Salmo salar ) Parr to Brook Trout ( Salvelinus fontinalis ) Predation

• Published in: Journal of the Fisheries Research Board of Canada
• Main Authors: Hatfield, C. T., Anderson, J. M.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1972
• Subjects: General Medicine; Atlantic salmon; Salmo salar
• Online Access: http://dx.doi.org/10.1139/f72-004; http://www.nrcresearchpress.com/doi/pdf/10.1139/f72-004

The experiments were conducted in large outdoor concrete pools in which the salmon had access to a safe haven. After exposure for 24 hr to 1.0 ppm of the organophosphate insecticide, Sumithion, Atlantic salmon (Salmo salar) parr were more vulnerable than unexposed fish to prédation by large brook trout (Salvelinus fontinalis). Sumithion at 0.1 ppm, and DDT at 0.07 ppm, had no noticeable effect. The results, particularly for Sumithion, correlate well with previous laboratory work on the effect of insecticides on the learning ability of salmon.