Ramachandran, A; Sankar, T V(Society of Fisheries Technologists (India), 2001)
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Abstract:
Total biochemical composition of freshwater major carps, Labeo rohita -(r9hu); Catla catla
(catla); Cirrltinus tnrigala (mrigal), in relation to size was evaluated . The water soluble
nitrogen fraction constituted about 21% of the tota l nitro gen . Salt so luble fraction
constituted 55 - 60% of the total nitrogen. Non-protein nitrogen represented 12% of the
total nit rogen in all the cases except mri gal of small size (9.36%). The insoluble connec tive
tissu e contributed to 2-3 per cent of tota l nitrogen . The monounsaturated fatty acid s (MUFA)
formed 31-39% of the total fatty acids and 60-68% of the MUFA in freshwat er carps was
CI 8:1. The esse ntial amino acids contributed to 41 to 51% of the total amino acid s in
freshwater major carps. Arom atic amino acid content was sligh tly higher compared to
marine fishe s while the proportion of proline was less. Varia tions in compos ition in rela tion
to size are discu ssed . The autolytic activi ty was significantly higher in small fish in all
the three species