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Lethal Toxicity of Glyphosate Herbicide on Koi Carp, Cyprinus carpio (Linnaeus, 1758) Fingerlings
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Bioassay experiments were conducted to determine the lethal toxicity of glyphosate herbicide on Koi carp, Cyprinus carpio fingerlings. Koi carp fingerlings with mean length 8.06 ± 0.99 cm were obtained from a freshwater fish seed hatchery of the university. The fishes were exposed to different concentrations of glyphosate and mortality was recorded after every 6 h for a period of 96 h. The 96 h LC50 concentration for glyphosate on Koi carp fingerlings was found to be 33.2 mgL-1. The results indicated that glyphosate had impacts on exposed fish, hence, the need for regulation of usage to protect non-targeted species and the environment.
Keywords
Bioassay, Glyphosate, Herbicide, Koi Carp, Lethal Toxicity.
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