Proximate, Mineral and Fatty Acid Composition of Catla catla Reared in Fresh Water and Waste Water Environment

The study was carried out to determine the differences in proximate, mineral and fatty acid composition of Catla catla reared in fresh water (FW) and waste water (WW). The samples were collected from different places of West Bengal and the body weights ranged from 250–2500 g. Crude lipid, total ash and the moisture contents were similar between two groups, however, protein content was higher (P<0.05) in WW reared catla. Zinc and selenium content was higher (P<0.05) in WW reared catla, however, iron, manganese, sodium, potassium and calcium contents were similar in catla from two sources. Palmitic acid was predominant SFA in catla from both the sources. The levels of myristic acid and heneicosanoic acid were higher (P<0.05) in FW reared catla whereas stearic acid concentration was more (P<0.05) in WW reared catla. Among MUFA, oleic acid content was higher (P<0.05) in FW reared catla. The polyunsaturated fatty acid (PUFA) content was 18.47±2.13 and 14.3±1.47%, respectively in FW and WW reared catla. Among PUFA, eicosapentanoic acid and docosahexanoic acid contents were 3.01±0.83 and 1.98±0.15; 0.52±0.09 and 0.21±0.04% in FW and WW reared catla, respectively. Therefore, contents of protein, zinc and selenium were higher in waste water reared catla while total contents of saturated, mono-unsaturated and polyunsaturated fatty acids were similar in catla reared under waste water and fresh water conditions.