Lethal Concentrations of Copper and Zinc for Young Atlantic Salmon
The toxicity of copper and zinc sulphates to immature Atlantic salmon (Salmo salar L.) was tested in soft water.The relation between concentration of metal and survival-time could be fitted by a straight line when logarithms were used. A sharp break in this relation marked the incipient lethal level...
| Published in: | Journal of the Fisheries Research Board of Canada |
|---|---|
| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1964
|
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/f64-003 http://www.nrcresearchpress.com/doi/pdf/10.1139/f64-003 |
| Summary: | The toxicity of copper and zinc sulphates to immature Atlantic salmon (Salmo salar L.) was tested in soft water.The relation between concentration of metal and survival-time could be fitted by a straight line when logarithms were used. A sharp break in this relation marked the incipient lethal level, where survival became indefinitely long. Incipient lethal levels were 48 μg/l of copper and 600 μg/l of zinc.In solutions containing both copper and zinc, fish died twice as fast as would occur if the 2 metals were simply additive in their lethal action. Resistance-times in zinc solutions were increased at pH 7.9–9.3, and results fitted the hypothesis that dissolved zinc was toxic, but not suspended zinc. Survival in a given concentration of zinc was 4 times as long at 5° as at 15 °C, and the incipient lethal level was at least 1.5 times higher, with fish acclimated to each temperature. |
|---|