Temperature Selection of Juvenile Atlantic Salmon ( Salmo salar ) as Influenced by Various Toxic Substances

• Published in: Journal of the Fisheries Research Board of Canada
• Main Author: Peterson, R. H.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1976
• Subjects: General Medicine; Atlantic salmon; Salmo salar
• Online Access: http://dx.doi.org/10.1139/f76-219; http://www.nrcresearchpress.com/doi/pdf/10.1139/f76-219

Previous exposure to sodium pentachlorophenate (NaPCP), Guthion ® , malathion, Dursban ® , and Dibrom ® lowered the preferred temperature for juvenile Atlantic salmon (Salmo salar) tested in a horizontal temperature gradient. Lindane, CuSO 4 , ZnSO 4 , CdSO 4 , Sevin ® , heptachlor, and fenitrothion did not change the preferred temperature significantly. Comparison with other published results indicates that those substances that increase the preferred temperature are more toxic (based on relevant changes in 24-h LC50) at low temperatures and vice versa. It is suggested that such shifts in selected temperature may be of potential immediate, short-term, survival value to the fish.