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Title: Seasonal variations in trace metal content in bivalve molluscs, Villorita cyprinoides var. cochinensis (Hanley), Meretrix casta (Chemnitz) and Perna viridis (Linnaeus)
Authors: Lakshmanan, P T
Nambisan, P N K
Issue Date: Jun-1983
Publisher: NISCAIR-CSIR, India
Abstract: Concentrations of Fe, Cu, Zn and Pb in the molluscs studied were influenced by season. Highest concentrations of these metals were found during low salinity and low pH of the habitat water (monsoon periods). Metal concentrations decreased in these species in summer months-the period of high salinity and pH. Fe was the most abundant trace metal in all the 3 species. Significant negative correlations were observed between trace metal content in the tissues of the molluscs and habitat water salinity. Nearly all the 4 metals were positively correlated in the clams, V. cyprinoides and M. casta. In P. viridis only a few combinations (Cu/Zn, Cu/Pb and Zn/Pb) were significantly correlated. The levels of various metals studied, in these bivalves were well below the permitted limits recommended for these metals in marine products.
Page(s): 100-103
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.12(2) [June 1983]

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