Abstract
Hepatic copper levels may not indicate short-term exposure to waterborne copper in teleosts. Significantly higher copper loads were found in the gills of rainbow trout exposed to 105 μg · L−1 total measured copper for a period of 24 h than in control animals where no differences were recorded in hepatic copper levels. A second experiment exposing trout to 153 μg · L−1 total measured copper also demonstrated significant differences in branchial copper levels between control and exposed animals after 3 h exposure. The ratio of the copper load in the gills to the liver, and copper/zinc ratios of the gills were also examined. After exposure to 105 μg · L−1 for 24 h both gill/liver copper ratios and Cu/Zn ratios in exposed animals were significantly greater than in control animals. After 12 h exposure to 153 μg · L−1 total measured copper the gill Cu/Zn ratio was significantly greater than in control animals. These data indicate the gills may be a better indicator of short-term exposure than the liver.
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Received: 24 August 2001/Accepted: 19 January 2002
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Daglish, R., Nowak, B. Rainbow Trout Gills Are a Sensitive Biomarker of Short-Term Exposure to Waterborne Copper. Arch. Environ. Contam. Toxicol. 43, 98–102 (2002). https://doi.org/10.1007/s00244-002-1184-5
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DOI: https://doi.org/10.1007/s00244-002-1184-5