Mercury Content of Fishes from Some Streams in Akwa Ibom State, Nigeria
DOI:
https://doi.org/10.3923/pjn.2007.633.637Keywords:
Fishes in Akwa Ibom State, food chain, heavy metals, mercury content, NigeriaAbstract
Samples of oreochromis nillotum, pomadasys jubillini, brycinus nurse, tilapia quineense and hermichromis fasciatus have been analysed for their mercury content. The result of the analysis shows mean mercury content to be 0.044 ppm, 0.068 ppm, 0.036 ppm, 0.04 ppm and 0.031 ppm for oreochromis nillotum, pomadasys jubillini, brycinus nurse, tilapia quineense and hermichromis fasciatus respectively. This values were lower than the limit of 1 ppm for mercury in fish. The values were also comparable to range of values reported for most fishes. The mercury content of the fish were found to vary with species (with pamadasys junillini having the highest and hermichromis fasciatus having the least concentrations), length and weight of the fishes. The consumption of matured and different species of fishes is advocated in this work.
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