Evaluation of growth characteristics and muscle nutrients of the breeding Carassius auratus
[Objective]The study aimed to investigate the growth characteristics and muscle quality of the breeding population of Carassius auratus(crucian carp).[Method]A 60-day culture experiment was car-ried out to analyze the growth performance,muscle nutrients,amino acid,and fatty acid composition of the 5th-generation crucian carp after breeding(breeding group)and non-breeding crucian carp(control group).[Result]The growth indexes in the breeding group,including body weight,total length,body length,and body height,were significantly higher than those in the control group(P<0.05).The contents of crude fat and moisture were significantly lower in the breeding group than those in the control group(P<0.05).The contents of saturated fatty acid(SFA)and polyunsaturated fatty acid(PUFA)were significantly lower in the breeding group than those in the control group(P<0.01).The essential amino acid(EAA)was significantly higher in the breeding group than in the control group(P<0.01),and the semi-essential amino acid(HEAA)was significantly lower than that of the control group(P<0.05).Amino acid score(AAS),chemi-cal score(CS),and essential amino acid index(EAAI)in the breeding group were higher than those in the control group.[Conclusion]The breeding group had excellent cultural characteristics of fast growth,high protein and low fat,high amino acid content,and relatively balanced proportions.The findings would pro-vide some reference for the breeding management and further utilization of breeding Carassius auratus.