Temperature-Induced Changes in Acute Toxicity of Zinc to Atlantic Salmon (Salmo salar)

摘要: Three groups of Atlantic salmon (Salmo salar) parr were acclimated to water temperatures 3, 11, and 19 C. When exposed at their acclimation temperature lethal concentrations zinc, cold-acclimated survived longer than warm-acclimated salmon. However, the threshold concentration (LC50) zinc was highest for 19 C, i.e. there less toxicity high temperature. At test lower prior temperatures, survival times in but LC50 lower, fish tolerant zinc. The opposite results seen above temperatures.The may be predicted by equation LC50 = 1.9611 − 0.1873 Ta + 0.8699 Te − 0.0414 Te2 + 0.00004 Ta Te3, where = Te exposure.In polluted rivers, most damaging populations during winter months. Measured copper Miramichi Rive...