TY - JOUR
T1 - Seasonal variability in cadmium, lead, copper, zinc and iron concentrations in the three major fish species, oreochromis niloticus, lates niloticus and rastrineobola argentea in winam gulf, Lake Victoria
T2 - Impact of wash-off into the lake
AU - Ongeri, David M.K.
AU - Lalah, Joseph O.
AU - Wandiga, Shem O.
AU - Schramm, Karl Werner
AU - Michalke, Bernard
PY - 2012/2
Y1 - 2012/2
N2 - Trace metals Cadmium (Cd), Lead (Pb), Copper (Cu), Zinc (Zn) and Iron (Fe) were analyzed in edible portions of three main finfish species namely Lates niloticus, Oreochromis niloticus and Rastrineobola argentea sampled from various beaches of Winam Gulf, Lake Victoria, Kenya, in order to determine any seasonal and site variations and the results showed significantly (p < 0.05) higher mean concentrations of Cd, Cu, Zn and Fe during the wet season compared to the dry season for all the three species indicating the impact of wash-off into the lake during the rainy periods. The overall mean concentrations of the heavy metals (in μg/g dry weight) in all combined samples ranged from 0.17-0.40 (Cd), 0.47-2.53 (Pb), 2.13-8.74 (Cu), 28.9-409.3 (Zn) and 31.4-208.1 (Fe), respectively. It was found that consumption of Rastrineobola argentea can be a significant source of heavy metals especially Zn, to humans, compared with Lates niloticus and Oreochromis niloticus, if only the muscle parts of the latter two are consumed.
AB - Trace metals Cadmium (Cd), Lead (Pb), Copper (Cu), Zinc (Zn) and Iron (Fe) were analyzed in edible portions of three main finfish species namely Lates niloticus, Oreochromis niloticus and Rastrineobola argentea sampled from various beaches of Winam Gulf, Lake Victoria, Kenya, in order to determine any seasonal and site variations and the results showed significantly (p < 0.05) higher mean concentrations of Cd, Cu, Zn and Fe during the wet season compared to the dry season for all the three species indicating the impact of wash-off into the lake during the rainy periods. The overall mean concentrations of the heavy metals (in μg/g dry weight) in all combined samples ranged from 0.17-0.40 (Cd), 0.47-2.53 (Pb), 2.13-8.74 (Cu), 28.9-409.3 (Zn) and 31.4-208.1 (Fe), respectively. It was found that consumption of Rastrineobola argentea can be a significant source of heavy metals especially Zn, to humans, compared with Lates niloticus and Oreochromis niloticus, if only the muscle parts of the latter two are consumed.
KW - Fish
KW - Heavy-metals
KW - Human-consumption
KW - Lake Victoria
UR - http://www.scopus.com/inward/record.url?scp=84856556176&partnerID=8YFLogxK
U2 - 10.1007/s00128-011-0472-z
DO - 10.1007/s00128-011-0472-z
M3 - Article
C2 - 22130608
AN - SCOPUS:84856556176
SN - 0007-4861
VL - 88
SP - 166
EP - 171
JO - Bulletin of Environmental Contamination and Toxicology
JF - Bulletin of Environmental Contamination and Toxicology
IS - 2
ER -
