Chemical composition of edible parts of three-year-old experimental scaly crossbreds of common carp (Cyprinus carpio, Linnaeus 1758)

Abstract

The aim of the study was to compare the quality of edible parts of three experimental groups of carp, i.e. pure line of Přerov scaly carp (PS), hybrid line of Přerov scaly carp and northern mirror carp (PS×M72), the hybrid line of Přerov scaly carp and Ropsha scaly carp (PS×ROP), with the quality of edible parts of control hybrids of Hungarian and northern mirror carp (M2×M72) in harvest size (K 3 ). The chemical composition of edible parts of the experimental groups of carp (PS, PS×M72, PS×ROP) was comparable with that of the control group (M2×M72). The highest fat content (89.8±1.94 g kg −1 ) was found in the fillet of PS×ROP hybrids (P<0.05). Of EAA sum (48.54±0.31%) in the fillet of PS×ROP hybrids, Lys (9.17±0.47%) and Leu (8.28±0.49%) were the most abundant. In comparison with organs, their fillet contained more His (4.38±0.34%, P<0.01), the ovaries more Val (11.65±0.37%, P<0.01) and testes more Ile (8.13±0.53%, P<0.01), Lys (11.70±0.63%, P<0.01) and Arg (10.44±0.27%, P<0.01). In the hepatopancreas of PS×ROP hybrids Phe (4.86±0.25%, P<0.05) was the most abundant. The fillet of PS×ROP hybrids contained SFA sum (21.37±0.46%), MUFA sum (64.20±0.57%) and PUFA sum (14.56±0.34%) in the ratio of 1:3:0.7. Of the fatty acids PUFA n-3 sum (2.39±0.09%), the most abundant in the fillet of PS×ROP hybrids was the essential linolenic acid C18:3n-3 (0.86±0.09%) and the eicosapentaenic acid C20:5n-3 (0.69±0.09%) and the docosahexaenic acid C22:6n-3 (0.35±0.02%). The PUFA n-6/n-3 ratio in the fillet of PS×ROP hybrids was 3.25±0.18. The quality of edible parts of PS×ROP hybrids was comparable with that of commercially farmed M2×M72 mirror carp. From the point of view of chemical evaluation of the quality of edible parts, PS×ROP hybrids can be recommended for commercial farming in aquacultures.