SEASONAL VARIATION OF CHEMICAL COMPOSITION AND FATTY ACID PROFILE OF OVARY IN WILD COMMON CARP (CYPRINUS CARPIO) OF SOUTHEASTERN CASPIAN SEA

Document Type : Research Paper

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Abstract

Chemical composition and fatty acid profile of common carp's gonad (ovary) were assessed. Protein, lipid, fatty acid profile and moisture content were determined during 4 seasons' summer, autumn, winter in 2007 and spring in 2008. For each season 10 samples were examined. Average of gonadosomatic index ill wild common carp was 7.53±5.02. Proximate composition of ovary during the study period showed the lipid at 8.06±2.20 protein at 23.26±4.85 and moisture at 67.12±3.85. The results showed lipid content of wild fish ovary increased from summer to spring (summer 6.875±0.53 autumn 7.07±2.12 winter 7.96±1.22 spring 9.44±3.62) protein content also increased from summer to spring (summer 12.920.09; autumn 23±1.32 winter 25.16±0.63 spring 27.11±0.63), moisture content decreased in this period (summer 75.235±1.75 autumn 68.25±2.28 winter 65.685±0.40; spring 63.43±0.11). Significant differences (P<0.05) in protein and moisture content were found during different seasons, but for lipid content the differences were not significant (P>0.05). Saturated and polyunsaturated fatty acids increased from summer to spring (spawning season). The major fatty acids identifiedin common carp ovary were Oleic (C18:1), palmitic (C16:0), Docosahexanoic acid (C22:6 DHA), Palmitoleic (C16:1), Arachidonic, AA (C20:4), Stearic (C18:0), Eicosapentaenoicacid (C20:5 EPA) and Linoleic (C18:2) in all seasons. Lipid, protein and w3 PUPA increased during gonad maturation. It seems that these resources of energy are necessary for embryogenesis.

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Iranian Scientific Fisheries Journal
Volume 18, Issue 1
January and February 2008
Pages 151-160

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