ارتباط بين تركيبات چربي عضله در ماهي كپور معمولي با كاتيون هاي موجود در آب (Cyprinus carpio Linneaus 1758)

The relationship between lipid compositions of muscle in common carp (Cyprinus carpio Linneaus 1758) and water cations

In present study, the relationship between water cations (Na\ K+, Ca2+ and Mg2+) with lipid compositions of muscle in common carp (Cyprinus carpio) in 15 ponds with capacity of 10 hectare were investigated. The experiment was carried out for 7 months (from March to October 2007) in Dikjeh area of Gonbad in Golestan province. The range of salinity (0.3-2.7 gr/1), Na+ (0.99-26.30 mMol/1), K+ (0.60-14.20 mMol/1), Ca2+ (0.68-24.62 mg/dl) and Mg2+ (0.87-12 mg/dl) were measured. Total lipid of muscle showed significant and positive correlations with water salinity (P<0.01) and Na+ (P<0.05), respectively. The correlations of water salinity and Ca2+ with linoleic acid and (£n-6) PUFA were significant and positive (P<0.05). But no significant correlations were found (P>0.05) among other unsaturated fatty acids with water salinity and ionic parameters. As a result, water salinity and ionic parameters influence lipid quality of common carp.