Abstract
Effects of water volume and water column height on toxicity of cypermethrin, carbaryl, dichlorvos, tetradifon, maneb, captan, carbosulfan endosulfan and HgCl2 to juvenile rainbow trout (Oncorhynchus mykiss, 3.2 ± 0.7 g) were evaluated in different glass aquaria under static conditions. When fish were exposed to the chemical compounds in 23 cm water column height (25 L), their mortality ranged between 0% and 58%. At the same water volume, but lower water column height (9 cm), mortality of fish increased significantly and was in a range from 60% to 95%. At the same water column height, toxic effects of chemicals were significantly higher in 25 L water volume than that of 8.5 L, water except maneb which has lowest (−0.45) octanol–water partition coefficient value. Mortality rates ratio of 9 and 23 cm water column height ranged between 1.12 and 90 while mortality rates ratio of 9 and 25 L water volume ranged between 1.20 and 4.0. Because actual exposure concentrations were not affected by either water volume or water column height, we propose that increased pesticides’ toxicity was related to an increase in bioassay volume, since more pesticide molecules were able to interact with or accumulate the fish. However, there seem to be no relationship between the effects of water volume, water column height and Kow value of chemicals with regard to toxicity in juvenile rainbow trout.
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The study was supported by Karadeniz Technical University Research Fund and Faculty of Marine Science.
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Altinok, I., Capkin, E. & Boran, H. Influence of Bioassay Volume, Water Column Height, and Octanol–Water Partition Coefficient on the Toxicity of Pesticides to Rainbow Trout. Bull Environ Contam Toxicol 86, 596–600 (2011). https://doi.org/10.1007/s00128-011-0281-4
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DOI: https://doi.org/10.1007/s00128-011-0281-4