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Publication Type
Conference Proceedings
Author, Analytic
Robinson, Dwight, E.; Mansingh, Ajai
Author Role
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Author Affiliation
Life Sciences; Faculty of Pure and Applied Sciences
Paper/Section Title
Ecotoxicity studies in Jamaican environment I: Toxicity, bioaccumulation, elimination and tissue partitioning of ethoprophos by the fish Tilapia in brackish water microcosm
Medium Designator
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Connective Phrase
In
Editor/Compiler
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Editor/Compiler Role
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Proceedings Title
International Symposium on Marine Pollution: Extended Synopses
Date of Meeting
October 5-9, 1998
Place of Meeting
Monaco
Place of Publication
Vienna
Publisher Name
International Atomic Energy Agency
Date of Publication
1998
Date of Copyright
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Volume ID
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Location in Work
139-140
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Series Editor
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Series Editor Role
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Series Title
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Series Volume ID
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Location/URL
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ISBN
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Notes
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Abstract
Widespread use of insecticides in Jamaica has contaminated surface, ground and coastal waters. Studies on endosulfan and ethoprophos revealed that up to 30% of the residues may run off from mountain slopes in the watershed with frequent rainfall, causing undetermined ecotoxic effects. This study was conducted on the toxicity of ethoprophos to sexually mature red hybrid Tilapia, involving the uptake, degradation and elimination of residues by the fish. The NOEC and LOEC were 1 and 4 mg/L of ethoprophos; the 24-h LC50 and LC95 values were 8.41 and 21.00 mg/L. Bioconcentration of the insecticide from NOEC and LOEC in the surrounding water by the fish peaked (3.25 0.412 and 12.50 1.831, respectively) 8 to 12 h after exposure. The contaminated fish (after 24-h exposure to LOEC) eliminated 83% of the ethoprophos residues within 12-h exposure to uncontaminated water. The order of partitioning of ethoprophos in the different tissues of the fish was gonads>liver>gut >gills> skin/muscle/bone....
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Keywords
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