Document Detail


Pesticide/herbicide pollutants in the Kafue River and a preliminary investigation into their biological effect through catalase levels in fish.
MedLine Citation:
PMID:  17201197     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The study determined the types of pesticide/herbicide pollutants in water, sediment and fish from the Kafue River. A preliminary investigation of the oxidative stress from these pesticides/herbicides was also assessed by measurement of catalase activity. Water, sediment and fish samples were collected upstream, midstream and downstream the Kafue river in Chingola, Kitwe, Kafue National Park and Kafue Town. Water, sediment and fish muscle were sampled and analysed for pesticides using Gas chromatography. For catalase activity fish liver samples only were examined. The pesticides/herbicides detected in all samples collectively included: Heptachlor, pp'-DDE, Cypermethrin, Chlordane, Toxaphene, Terbufos, Kelthane, Endosulfan, Dieldrin, pp'-DDD, pp'-DDT, Atrazine, Disulfoton, d-trans-Allethrin and Endrin. On the other hand, catalase activity was detected in all fish liver samples from all sites. Its levels increased significantly from Chingola upstream to sites downstream with highest being in Kafue town. This study therefore, demonstrates that there is widespread contamination of the Kafue River with pesticides/ herbicides. It also demonstrates that organochlorides are found throughout the river especially in fish samples. The spectrum of pesticides/herbicides was much wider in fish probably due to bioaccumulation. It was also observed that fish are subjected to oxidative stress as determined by catalase levels. The stress is more pronounced downstream where the catalase levels were significantly higher than Chingola. The observation that more pesticide varieties are also found downstream may suggest a likely causative effect of the pesticides on oxidative stress although this needs further investigation. This study further tentatively highlights the potential dangers of these agro-related substances to dependants of the Kafue River water body and the need to carry out risk assessments and thereafter institute corrective measures to help reduce contamination and adverse effects.
Authors:
Michelo Syakalima; Kennedy Choongo; Roy Mwenechanya; Victor Wepener; Masahiro Yamasaki; Yoshimitsu Maede
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Japanese journal of veterinary research     Volume:  54     ISSN:  0047-1917     ISO Abbreviation:  Jpn. J. Vet. Res.     Publication Date:  2006 Nov 
Date Detail:
Created Date:  2007-01-04     Completed Date:  2007-02-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376567     Medline TA:  Jpn J Vet Res     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  119-28     Citation Subset:  IM    
Affiliation:
School of Veterinary Medicine, University of Zambia, Box 32379, Lusaka, Zambia. michelo@lycos.com
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MeSH Terms
Descriptor/Qualifier:
Animals
Catalase / metabolism*
Fishes / metabolism*
Geologic Sediments / chemistry
Japan
Pesticides / analysis*,  toxicity*
Rivers / chemistry*
Time Factors
Water Pollutants, Chemical / analysis*,  toxicity
Water Pollution, Chemical
Chemical
Reg. No./Substance:
0/Pesticides; 0/Water Pollutants, Chemical; EC 1.11.1.6/Catalase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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