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Publication Type
Journal Article
UWI Author(s)
Author, Analytic
Robinson, Dwight E.
Author Affiliation, Ana.
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Article Title
Bioaccumulation and Tissue Partitioning of Endosulfan by the Red Hybrid Tilapia
Medium Designator
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Connective Phrase
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Journal Title
OnLine Journal of Biological Sciences
Translated Title
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Reprint Status
Refereed
Date of Publication
2015
Volume ID
15
Issue ID
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Page(s)
97-103
Language
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Connective Phrase
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Location/URL
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ISSN
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Notes
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Abstract
The frequent use of endosulfan in agricultural activity on steep slopes in Jamaica and subsequent contamination of rivers by the residues resulted in a need to assess the levels of bioaccumulation of sub-lethal doses of the insecticide in river fauna using Tilapia fish as a test subject. Bioconcentration of α- and β-endosulfan by the Red Hybrid Tilapia, from 0.0075 mg L-1 in the surrounding water, reached a peak (0.578 ppb and 0.442 ppb, respectively) in one to four hours but fluctuated during the rest of the 72-h observation period. A similar pattern of bioaccumulation was recorded when the fish were exposed to 0.015 mg L-1, except that the peak bioaccumulation of α- and β-isomers after one hour of exposure were 0.54 and 0.44 mg L-1, respectively. The contaminated fish (from 24-h exposure to 0.015 mg L-1) eliminated only 18 to 31% of endosulfan residues after 24 h and 26 to 39% after 72-h exposure to uncontaminated water. During the process of bioconcentration, endosulfan was metabolized to endosulfan lactone and sulfate; the degradation was more during the elimination process when exposed to clean water. Maximum amounts of α-and β-endosulfan and their metabolites were partitioned in gonads > liver > gills > skin/muscle/bone.....
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Keywords