||Effect of Zinc Exposure on Subsequent Acute Tolerance to Heavy Metals in Rainbow Trout.
Anadu, D. I. ;
Chapman, G. A. ;
Curtis, L. R. ;
Tubb., R. A. ;
||Environmental Research Lab.-Narragansett, Newport, OR. Mark O. Hatfield Marine Science Center. ;Anambra State Univ. of Technology, Abakaliki (Nigeria). Dept. of Animal Production and Aquaculture. ;Oregon State Univ., Corvallis. Dept. of Fisheries and Wildlife.
Oncorhynchus mykiss ;
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Fish usually show increased tolerance to metals in solution if previously given an opportunity to acclimate to near lethal concentrations of the metal. Tolerance has been correlated with an increase in tissue metallothionein (MT). The purposes of the tests described were to investigate the potential for increased tolerance to zinc; to evaluate correlations between tolerance and liver MT level; to go beyond simple one-step acclimation by increasing the acclimation level as tolerance developed; to measure loss of tolerance following transfer of acclimated fish to control water; and to determine if zinc acclimation led to increased tolerance to copper and cadmium.