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Please use this identifier to cite or link to this item: http://hdl.handle.net/1834/30

Title: Organochlorine Pesticide Residues in Edible Biota from the Coastal Area of Dar es Salaam City
Authors: Mwevura, H.
Othman, O.C.
Mhehe, G.L.
Issue Date: 2002
Publisher: Western Indian Ocean Marine Science Association (WIOMSA)
Citation: Western Indian Ocean J. Marine Science, 1 (1), p. 91-96
Abstract: This paper reports on the levels of organochlorine pesticide residues in edible biota from the coastal area of Dar es Salaam city, Tanzania. Samples were collected from the Msimbazi and Kizinga rivers and from the coastal marine environment receiving waters from these rivers. The samples were analysed for various organochlorine pesticide residues using GC-ECD and the results confirmed with GC-MS. Dieldrin, p,p'-DDT, p,p'-DDE, p,p'-DDD, o,p'-DDT and 'Y- HCH were the only organochlorines detected at concentrations above the method detection limits (MDL). The samples showed significant differences in levels of residues depending on location, mode of feeding and age/size of analysed biota. p,p'-DDT to total DDT ratios in biota indicated recent contamination of DDT. Biota from mangrove areas showed highest level of residues followed by those from fresh water while lowest concentrations were detected in biota from marine coastal water. In spite of concerns on the adverse effects to humans posed by pesticide residues in sediments reported from previous studies, edible biota from the examined water bodies are safe for human consumption.
Description: Research Group: Chemistry Department, University of Dar es Salaam. P.O. Box 35061, Dares Salaam, Tanzania
URI: http://hdl.handle.net/1834/30
ISSN: 0856-860x
Appears in Collections:Western Indian Ocean Journal of Marine Science - Archive

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