Study of calcium protective effect against copper toxicity for juvenile common carp (Cyprinus carpio)

Subject Areas : New Technologies in Aquaculture Development

Received: 2021-02-03 Accepted : 2021-02-03 Published : 2014-05-22

Keywords: copper sulfate, Histopathology, Keywords: Cyprinus carpio, calcium oxide,

Abstract :

Abstract[1] This study assessed the fry on common carp (Cyprinus carpio) exposed to calcium oxide. Half of the fish were exposed in calcium oxide concentration of 100 mg per liter for 4 days. Then this group of fish for 30 days were exposed at concentrations of 0, 1.5 and 3 mg/l copper sulfate. Three other groups of fry, without using calcium were exposed at concentrations of the same dosage of copper for 30 days. Growth factor such as weight gain, increasing the total length, condition factor (CF), mortality percent and copper concentrations were measured in fish muscle. Histology of the gills, liver and kidneys fry were prepared after the test period. The total weight of carp fry significantly influenced by the presence of copper and calcium concentrations (P<0.05). Fish of group 1 and 2 (0 and 1.5 mg/l copper sulfate) had increase weight and length compare to treatment 4 and 5 which was not treated with calcium (P>0.05). CF also had not significant between the treatments (P>0.05). Copper concentration was higher in mussel of fry by increasing copper sulfate (P<0.05), however the increase was less in connection with calcium. The concentration of 1.5 and 3 mg/l of copper sulfate, without joining of calcium, induces such effects of epithelium disjunction, secondary lamella junction, hypertrophy, hyperplasia, in gill tissue, paganism disorder, hepatocyte vacillation, kidney cell necrosis glomerular deterioration, Boman Capsule and disintegration changes, and glomerular tube. The result of present study showed that the fish exposed to calcium oxide can be as a protective factor against copper toxicity and cases a better growth rate of fish.   * Corresponding Authors; Email: [e-mail]