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Chronic exposure of coho salmon to sublethal concentrations of copper - 1. Effect on growth, on accumulation and distribution of copper, and on copper tolerance



Chronic exposure of coho salmon to sublethal concentrations of copper - 1. Effect on growth, on accumulation and distribution of copper, and on copper tolerance



Comparative Biochemistry and Physiology C Comparative Pharmacology 721: 15-19



Coho salmon, exposed to sublethal levels of aqueous Cu (1/4 and 1/2 LC50), lost appetite and ceased growing or showed decreased rates of growth. Recovery of appetite and growth rate was faster in fish exposed to 1/4 LC50. Cu levels were elevated in liver, gill and kidney of exposed fish, with the liver tissue accumulating the largest amount of Cu. The concentration of liver Cu became constant at about the time that growth rate recovered. The exposed fish exhibited higher resistance to elevated aqueous Cu levels than did controls. Coho salmon may become acclimated to higher levels of Cu and acclimated fish were more tolerant to Cu than controls.

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Accession: 020723353

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PMID: 6125330


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