Effects of Different Animal Feeds as Initial Feed on Growth and Survival of Chinese Sturgeon(Acipenser sinensis)Larvae
Chinese sturgeon(Acipenser sinensis)is a unique high-value rare protected animal in China.How to effectively improve the survival rate and growth rate is the key for breeding of Acipenser sinensis larvae.The purpose of this study was to evaluate the opening effect of different animal feeds on Acipenser sinensis larvae,and to screen appropriate initial feed for Acipenser sinensis larvae.L.hoffmeisteri,A.salina nauplius and L.hoffmeisteri+A.salina nauplius were selected as initial feed for Acipenser sinensis larvae through 16 days'breeding test,by comparing the differences of survival rate,body weight,body length and digestive activities.The results showed that the survival rate(87.8％)of the L.hoffmeisteri+A.salina nauplius treatment was signif-icantly higher than that of the A.salina nauplius treatment and the L.hoffmeisteri treatment(P＜0.05),and the weight gain rate(60％)and the specific growth rate(6.0％)were significantly higher than that of the A.salina nauplius treatment and the L.hoffmeisteri treatment(P＜0.05).On the basis,this study analyzed the nutritional components of L.hoffmeisteri and A.salina nauplius,and the results showed that A.salina nauplius has a higher levels of total fatty acids(19.0％),far higher than L.hoffmeisteri(4.26％),especially unsaturated fatty acids(38.22％vs 25.69％),which could effectively promote the growth and development of Acipenser sinensis lar-vae;L.hoffmeisteri had very high protein content(56.55％),was rich in carbohydrate(26.27％),and obvi-ously higher than those of A.salina nauplius(46.03％protein and 13.62％carbohydrate).In conclusion,the combination of L.hoffmeisteri and A.salina nauplius as the initial feed can provide a more balanced nutrition for Acipenser sinensis larvae,which can improve the survival rate and growth rate of Acipenser sinensis larvae.This study has accumulated important basic data for the breeding of Acipenser sinensis,and provides a theoreti-cal reference basis for further intensive breeding.[Chinese Journal of Animal Nutrition,2024,36(5):3209-3218]
万方数据
维普
