Original Articles

The sublethal effects of copper and lead on the haematology and acid-base balance of the groovy mullet, Liza dumerili

Published in: African Journal of Aquatic Science
Volume 27, issue 1, 2002 , pages: 39–46
DOI: 10.2989/16085914.2002.9626573
Author(s): HM MzimelaCoastal Research Unit of Zululand, Department of Zoology, South Africa, V WepenerCoastal Research Unit of Zululand, Department of Zoology, South Africa, DP CyrusCoastal Research Unit of Zululand, Department of Zoology, South Africa

Abstract

Toxicity bioassays were conducted on groovy mullet, Liza dumerili, using copper and lead, in order to assess how these metals affected their blood haematology and acid-base balance. Short-term (96 hours) exposure to lead caused significantly more haematological response [PCO2] than copper, when compared to the control. When copper and lead were applied in combination there were significant increases in bicarbonate content and red blood cell count of the fish. Long-term (28 days) exposure to copper and lead resulted in significant increases in blood glucose, haemoglobin content and the acid-base status of the fish.

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