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Evaluation of nutritive value, fatty acid composition and lipid quality indices of freshwater catfishes and murrels


Journal of Aquaculture & Marine Biology
Chiranjiv Pradhan,1,2 Dipti Ranjan Das,1 Tapan Kumar Mohanty,1 Shiba Shankar Giri1

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Abstract

The study was conducted to determine the nutritive value in terms of proximate composition, fatty acid (FA) profile and lipid quality indices off our catfish species (Wallago attu, Ompok pabda, Clarias gariepinus, Pangasidon hypophthalmus) and two murrel species (Channa striatus, Channa punctatus) from Odisha, India. Among the species investigated the maximum fillet protein (22.35%) and lipid (13.45%)was recorded in C. striatus and C. gariepinus, respectively. All the fish species showed a FA profile of saturated fatty acid (SFA)> mono unsaturated fatty acid (MUFA)>poly unsaturated fatty acid (PUFA). The n-3 PUFA distribution in the experimental species was observed as docosahexaenoic acid (DHA, 22:6 n-3)>alpha linolenic acid (ALA, 18:3 n-3)>eicosapentaenoic acid (EPA, 20:5 n-3) except C. gariepinus. The fillet EPA and DHA content of two murrel species and W. attu were similar and significantly higher (P<0.05) among the species. Similarly these three species viz., W. attu, C. striatus and C. punctatus showed maximum DHA quantity in their fillet. The n-6/n-3 ratios in five species except C. gariepinus were below 4.0. The athrogenic index (IA) and thrombogenic index (IT) were<1 and cholesterolomic index (h/H) for all species were>1, suitable for human health. Overall, considering nutritive value, fillet protein and very essential fatty acids, the experimental species can be arranged in the following order C. Straitus>C. punctatus=W. attu>P. Hypophthalmus>O. Pabda>C. gariepinus.

 

Keywords

catfishes, murrels, fatty acid profile, lipid quality indices, docosahexaenoic acid, gas chromatograph, nutritional status, feeding intensity

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