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Assessment of some heavy metals in the liver of freshwater Catfish (Clarias gariepinus) in Northeastern Nigeria

Author Affiliations

  • 1Department of Veterinary Public Health and Preventive Medicine, University of Maiduguri, Borno State, Nigeria
  • 2Department of Veterinary Public Health and Preventive Medicine, Ahmadu Bello University Zaria, Kaduna State Nigeria
  • 3Department of Veterinary Pharmacology and Toxicology, Ahmadu Bello University Zaria, Kaduna State, Nigeria
  • 4Department of Veterinary Medicine, University of Maiduguri, Borno State, Nigeria
  • 5Veterinary Teaching Hospital, Ahmadu Bello University Zaria, Kaduna State, Nigeria
  • 6Ministry of Animal Resources and Nomadic Resettlement Bauchi, Bauchi State, Nigeria
  • 7Department of Veterinary Public Health and Preventive Medicine, University of Maiduguri, Borno State, Nigeria

Res. J. Animal, Veterinary and Fishery Sci., Volume 6, Issue (3), Pages 1-6, April,24 (2018)


This study was aimed at assessing the levels of Cadmium (Cd) and Lead (Pb) in the liver of freshwater catfish Clarias gariepinus (C. gariepinus) from three fishing sites in Bade Local Government Area along the coast of River Yobe, Northeastern Nigeria. The concentrations of Cd and Pb in the liver of (C. gariepinus) were determined using atomic absorption spectrophotometer. A total of 41 samples were collected from Gada (n=12), Egjin Kavuru (14) and Zarara (15). The results obtained showed that 95.1% and 65.9% of the studied fish contained Cd and Pb respectively at concentrations above the maximum acceptable concentrations recommended by the WHO/FAO Joint Committee on Food and Additives (JECFA). Concentrations of Cd by location showed no significant difference (P<0.05) among the different fishing sites but there was statistically significant difference (p<0.05) in Pb concentrations between fish samples from Gada and EgjinKavuru on one hand and Zarara on the other hand. People who habitually consume catfish from this river stand the risk of exposure to low doses of Cd and Pb. Further studies are therefore recommended to evaluate the heavy metal pollution status of River Yobe and also to ascertain the levels of other nephrotoxic metals in different species of fish, meant for human consumption, from the river.


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