Abstract
Trace metal concentrations in two species of mysids, Mesopodopsis orientalis and Rhopalophthalmus indicus, from the Cochin estuary, were investigated during the monsoon and pre-monsoon periods. Metal concentration (ppm, dry weight) ranges in mysids during the monsoon and pre-monsoon periods were: Fe (775.75 to 1254.12), Mn (7.85 to 14.57), Co (0.76 to 1.75), Ni (11.19 to 20.00), Cu (20.02 to 47.42), Zn (66.83 to 106.62), Cr (14.30 to 28.45), Cd (0.53 to 1.70) and Pb (7.16 to 14.19). Trace metal bioaccumulation in mysids was found to be species-specific with higher metal concentrations in R. indicus than M. orientalis. Data on trace metal concentrations in mysids are important for environmental forensic investigations, useful for bio-monitoring (i.e., tracing) sources of contaminants (i.e., metal pollutants) and their impacts, and valuable for tracking the dispersal pathways of contaminants in estuarine environments.
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