Turkish Journal of Fisheries and Aquatic Sciences
2008, Vol 8, Num, 2 (Pages: 15-218)
Trace Metals Toxicity and Bioaccumulation in Mudskipper Periophthalmus waltoni Koumans 1941 (Gobiidae: Perciformes)
A.H. Bu-Olayan 1 ,B.V. Thomas 1
1 Kuwait University, Department of Chemistry, POB 5969, 13060, Kuwait
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The stressed ecosystem and the accumulation of inorganic pollutants in Kuwait Bay instigated us to conduct toxicity
and bioaccumulation tests on trace metals (Zn, Cu, Cd and Fe) to mudskipper, Periophthalmus waltoni, a bio-indicator fish to
marine pollution. Among the four metals, Cd had the lowest observed effective concentration (LOEC) at 1.5μg L-1. Probit
analysis which showed toxicity tests (96 h) on P. waltoni reared in filtered seawater in the laboratory showed Cd with
maximum effect at median lethal concentration (LC50) followed by Fe, Cu and Zn. Bioaccumulation factor (BAF) was in the
sequence of Cd > Fe > Cu > Zn. For fish exposed for 60 d, bioaccumulation exhibited increasing metal levels in liver
followed by muscle tissues and gills. These results will support ecologists to use P. waltoni as a bioindicator to metal
pollution in the future.
Keywords :
Trace metals, mudskipper, bioaccumulation, toxicity