Organochlorine pesticide residues in water, sediments and Nile tilapia (Oreochromis niloticus) of Lake Nakuru, Kenya and implications for its fishery

The present study was conducted to assess the levels of selected organochlorine pesticide (OCP) residues in water, sediments and Nile tilapia, as well as the potential health risks to humans who consume the fish of Lake Nakuru. Nine composite water and nine sediment samples, as well as 30 fish speci...

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Bibliographic Details
Published in:Lakes & Reservoirs : Science, Policy and Management for Sustainable Use Policy and Management for Sustainable Use, 2023-01, Vol.28 (1), p.n/a
Main Authors: Nantongo, Mary Florence, Edebe, Joseph, Otachi, Elick O., Kipkemboi, Julius
Format: Article
Language:English
Subjects:
Aldrin
aquatic pollution
Chlorine compounds
Consumption
DDD
DDE
DDT
Dichloroethane
Dieldrin
Endosulfan
Endrin
Environmental monitoring
Fish
Fisheries
fishery safety
Hazard mitigation
Health hazards
Health risks
Heptachlor
Heptachlor epoxide
Insecticides
Lake Nakuru
Lakes
Lindane
Marine fishes
Methoxychlor
Mitigation
Nitrous oxide
Oreochromis niloticus
Organic compounds
Organochlorine compounds
organochlorine pesticide residues
Organochlorine pesticides
Pesticide residues
Pesticides
Pollution control
Residues
Sampling
Sediment
Sediment samplers
Sediment samples
Sediments
Tilapia
Whitefish
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Summary:The present study was conducted to assess the levels of selected organochlorine pesticide (OCP) residues in water, sediments and Nile tilapia, as well as the potential health risks to humans who consume the fish of Lake Nakuru. Nine composite water and nine sediment samples, as well as 30 fish specimens, were collected from five representative sampling sites within Lake Nakuru. The OCPs targeted in the present study included p,p′‐Dichlorodiphenyl dichloroethane (p,p′‐DDD), p,p′‐dichlorodiphenyldichloroethylene (p,p′‐DDE), p,p′‐dichlorodiphenyltrichloroethane (p,p′‐DDT), heptachlor, heptachlor epoxide, α endosulfan (1), β endosulfan (2), endosulfan sulphate, endrin, lindane, aldrin, dieldrin, methoxychlor and hexachlorocyclohexanes (alpha; beta; gamma; delta). Except for aldrin, all 16 OCPs targeted in the present study were detected. The OCP residue levels ranged from below detection limit (BDL) to 7.44 ± 0.66 μg/L, BDL to 6.39 ± 1.10 μg/kg ww and BDL to 319.74 ± 66.94 μg/kg ww in water, sediment and fish samples respectively. Some OCP concentrations exhibited significant differences across the sampling sites (p 
ISSN:1320-5331
1440-1770
DOI:10.1111/lre.12424