Seasonal changes in whole brain amine levels of white sucker exposed to elevated levels of copper and zinc

Levels of dopamine, serotonin, and noradrenalin were measured in whole brains collected from white sucker (Catostomus commersoni) exposed to increased waterborne levels of copper and zinc associated with mining wastes. Few differences were detected between sites, and these findings are consistent with previous studies that failed to indicate chronic, direct effects of the metals on the white sucker populations. Levels of dopamine and serotonin …