The samples of fish, Megalaspis cordyla (Linnaeus) collected in Pre-monsoon (January to May), Monsoon (June to August) and Post-monsoon (September to December) seasons of 2010 from coastal waters of Karachi were measured for their size and heavy metals (Fe, Mn, Cd, Pb and Cr) in their muscles, liver, kidneys and gills were analyzed. The fish samples studied varied little in size - from 3.39 to 4.65% in length and 10.13 to 10.75% in weight. It was obvious from three-way ANOVA that different metals accumulated in different concentrations in the fish (F = 365.57, p < 0.0001), the concentration of metals was significantly influenced by the seasonal variation (F = 15.81, p < 0.0001) and also significantly varied with the organ type of the fish (F = 614.02, p < 0.0001). Seasons, organs and metal types, all interacted significantly (F = 10.85, p < 0.001). Fe was the predominant metal amongst all and was found to be significantly high in concentration than that of the other metals. The concentration of other metals (Mn, Cd, Pb and Cr) didn’t differ significantly from each other. Metals accumulated predominantly in liver. Muscles, kidneys and gills were not significantly different from each other in metals contents. Heavy metal contents of local M. cordyla were compared with the published reports on M. cordyla from South and Southeast Asian countries.
Quratulan Ahmed, D. Khan, Qadeer Mohammad Ali. (2014) HEAVY METALS (Fe, Mn, Pb, Cd, AND Cr) CONCENTRATIONS IN MUSCLES, LIVER, KIDNEYS AND GILLS OF TORPEDO SCAD [MEGALASPIS CORDYLA (LINNAEUS, 1758)] FROM KARACHI WATERS OF PAKISTAN, , Volume 11, Issue 4.
