Effect of Body Size on Metal Concentrations in Farmed Cirrhinus mrigala

摘要

In this study, metals such as zinc, iron, qopper, manganese, sodium, potassium and magnesium in freshwater Cirrhinus mrigala (whole fish) have been -analyzed and their relationships with fish length and weight have been derived Mean concentrations (mgg~(-1) dry weight) of the metals in carcasses of farmed C mrigala have been found to be 65.7 (Zn), 50.3 (Mn), 538 (Fe), 24 1 (Cu), 1182 (Na), 9850 (K) and 2155 (Mg). Lead and nickel concentrations were below the limit of detection of the teclmique. Allthe metals show isometric relationships with increasing body weight of C. mrigala Sodium indicates positive allometry whereas zinc shows negative allometry with increasing body length. However, copper, iron, potassium, magnesium and manganese show isometric relationships with increasing body length.