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Distribution of Selected Trace Metal in Fish Parts from the River Nigeria

Author Affiliations

  • 1 Department of Chemistry, Delta State University, Abraka, Delta State, NIGERIA
  • 2 Department of Botany, Delta State University, Abraka, Delta State, NIGERIA
  • 3 Department of Chemistry, College of Education, Agbor. Delta state, NIGERIA

Res. J. Recent Sci., Volume 1, Issue (1), Pages 81-84, January,2 (2012)


Three species of fish namely Chryschthys nigrodigitatus, Clarius anguillaris and Tilapia zilli obtained from the River Niger investigated to ascertain the extent of trace metal pollution. The fishes were cut into three parts namely, the gills, muscles and tails and were analysed for trace metals such as manganese, lead, cadmium, chromium, nickel and copper using the atomic absorption spectrophotometer of model pye unican SP 2900 Australia. The results obtained revealed that all the aforementioned trace metals were all detected and there were variations in the concentrations of metals in various fish parts analysed. There were evidence of bioaccumulation of metals in fishes indicating that they were highly polluted since the values exceeded the WHO set standard for fishes. A look at the mean results further indicated that the gills accumulate more metals than those of the muscles and tails. Also Tilapia zilli was observed to accumulate the highest trace metal levels than others in this study. Manganese had the highest concentrations when compared with other metals. The fishes studied can be used as indicators for environmental pollutions monitoring programme in Nigerian Rivers.


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