Seasonal variation of chemical composition and fatty acid profile of ovary in wild common carp (Cyprinus carpio) of southeastern Caspian Sea
2009
Yeganeh, S. | Shabanpour, B. | Hosseiny, H. | Imanpour, M.R. | Shabany, A. | Moeini, M. | Motalebi, A.A.
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 in wild common carp was 7.53 plus or minus 5.02. Proximate composition of ovary during the study period showed the lipid at 8.06 plus or minus 2.20; protein at 23.26 plus or minus 4.85; and moisture at 67.12 plus or minus 3.85. The results showed lipid content of wild fish ovary increased from summer to spring (summer 6.875 plus or minus 0.53; autumn 7.07 plus or minus 2.12; winter 7.96 plus or minus 1.22; spring 9.44 plus or minus 3.62), protein content also increased from summer to spring (summer 12.920.09; autumn 23 plus or minus 1.32; winter 25.16 plus or minus 0.63; spring 27.11 plus or minus 0.63), moisture content decreased in this period (summer 75.235 plus or minus 1.75; autumn 68.25 plus or minus 2.28; winter 65.685 plus or minus 0.40; spring 63.43 plus or minus 0.11). Significant differences (P0.05). Saturated and polyunsaturated fatty acids increased from summer to spring (spawning season). The major fatty acids identified in 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), Eicosapentaenoic acid (C20:5 EPA) and Linoleic (C18:2) in all seasons. Lipid, protein and omega 3 PUFA increased during gonad maturation. It seems that these resources of energy are necessary for embryogenesis.
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