摘要
试验分析了投喂卤虫无节幼体条件下黄颡鱼(Pseudogrus fulvidraco)仔稚鱼生长、存活率、摄食力和体成分的变化。随着仔稚鱼的生长和发育,摄食率和胃充塞度逐渐加大,体长大于10 mm的仔鱼,摄食率都在93.3%以上,大多数个体胃充塞度都在3～5级。投喂卤虫无节幼体的黄颡鱼仔稚鱼生长较传统育苗方式生长快,存活率高。体内粗养分、氨基酸与脂肪酸含量都发生相应变化。黄颡鱼淀粉酶、蛋白酶与脂肪酶活性均在1日龄时即可检测到,开口期即5日龄时,3种消化酶比活力均达到较高值,15日龄后消化酶比活力又都降低到较低水平。卤虫无节幼体体内营养物质含量丰富,大小适口,是黄颡鱼仔稚鱼开口摄食的优质生物饵料。
The larval stage of the yellow catfish（Pseudogrus fulvidraco） is a critical period during cultivation.The choice of weaning food has been the technical difficulty that has most plagued yellow catfish aquaculture.The use of artificially hatched Artemia nauplii as food source for larval yellow catfish aquaculture was assessed,in order to facilitate the large-scale factory production of yellow catfish nurseries.The changes in the growth,survival,food intake and body composition of the yellow catfish larvae and juveniles fed with Artemia nauplii were assessed using experimental analyses.As the larval growth and development progressed,the feeding rate and the relative size of the stomach gradually increased,growing up to 10 mm in size.Feeding rates were 93.3%,and most of the individual stomach filled to the 3–5 degree level.Yellow catfish larvae and juveniles fed with Artemia nauplii experienced changes in proximate nutrient levels,amino acid and fatty acid contents over the different growth periods.Amylase,protease,and lipase activities were detectable on the first day after hatching.During the initial feeding period（day 5–15） the specific activities of these three digestive enzymes were relatively high.On day 15,the specific activities of the digestive enzymes returned to a low level.Artemia nauplii is nutrient-rich and high-quality food source of a suitable size for the yellow catfish larvae and juveniles.
出处
《中国水产科学》
CAS
CSCD
北大核心
2012年第6期1034-1042,共9页
Journal of Fishery Sciences of China
基金
吉林省科技厅资助项目(吉科合字20040208-1)
吉林省教育厅资助项目(吉教科合字2006第29号)
关键词
卤虫
无节幼体
黄颡鱼
仔稚鱼
生物饵料
生长
存活率
摄食力
体成分
Artemia nauplii
Pseudogrus fulvidraco
larvae and juveniles
food organism
growth
survival rate
feeding ability
body composition
