Dressed rates and muscular nutrients in northern snakehead Channa argus,Taiwan snakehead C.maculata and their hybrids
LUO Qing1, CHEN Kun-ci1, ZHAO Jian1,2, HONG Xiao-you1, ZHU Xin-ping1, SHI Yan1
1.Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation， Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; 2.College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
Abstract: Dressed rates and muscular nutrients were analyzed and evaluated in northern snakehead Channa argus, Taiwan snakehead C.maculata and their hybrids (C.argus♀×C.maculata♂, and C.maculata ♀×C.argus ♂). The dressed rate was shown to be 68.24% in northern snakehead, 70.18% in C.maculata♀×C.argus♂, 71.34% in Taiwan snakehead, and 70.71% in C.argus♀×C.maculata♂. Northern snakehead and C.maculata♀×C.argus♂ had crude protein of 20.6%-21.4%, moisture of 76.1%-76.7% (less fluctuation), crude fat content<1.7% (more fluctuation), and ash of 1.2%-1.5% in muscle. The C.maculata♀×C.argus ♂ had crude fat content of 1.6% and the hybrid C.argus♀×C.maculata♂1.7%, higher than northern snakehead and Taiwan snakehead did. Sixteen common amino acids, and nine essential amino acids for human needs, accounting for 49.40%-49.65% of total amino acids, were found in the muscle, with taste amino acids of 38.35%-38.87%. There were higher EAAI value and delicate amino acids content in C.argus♀×C.maculata♂ than those in northern snakehead, Taiwan snakehead and hybrid C.maculata♀×C.argus♂. The findings indicated that the four species of snakehead were rich in protein, and low in fat, with the high contents of essential amino acids and delicate amino acids. The hybrid C.argus♀×C.maculata♂ had similar nutritional values with other three species, and better muscle due to delicious amino acid (DAA) content.
2015, Vol. 30 
