Effect of different cadmium levels on growth and biochemical parameters of Cyprinus carpio fingerlings reared in a close system

الملخص EN

Five experimental diets were formulated to feed Cyprinus carpio fingerlings.

The diet contained CdCl2.H2O as a source of pollutant with levels 0, 0.5, 1, 2 and 3 mg /KgDW as well as the feed contained 28% crude protein and 8% crude lipid.

The experiment last for 71 days in Aquaculture breeding unit in College of Science, University of Salahaddin, Erbil.

The diets were hand-fed to fish twice a day at 3 % of fish body weight.

Fish exposure to 0.5, 1 and 3 mg/kg Cd for 71-days caused an increase in the levels of both Alanine Transaminase (ALT) and Aspartate Aminotransferase (AST) enzymes of C.

carpio.

Negative correlation was found among High Density Lipoprotein (HDL) with triglyceride, amylase, Glutamic-Pyruvic Transaminase (GPT), Glutamic oxaloacetic transaminase (GOT) and Alkaline phosphatase level (ALP).

by increasing Cd concentration, serum cholesterol levels were decreased.

Significant Positive correlation were observed between mass gain and fish growth rate, body final weight and survival, while negative correlation found between fish growth rate, mortality and feed conversion ratio (FCR) during this study.