工厂化流水养殖条件下大菱鲆幼鱼的适宜投喂率研究

Study on the Suitable Feeding Rate of the Juvenile Turbot under Factory Flowing Water Culture System

本实验在工厂化流水养殖条件下,研究不同的投喂率对大菱鲆幼鱼生长的影响。实验设置5档投喂率,分别为1.2%、1.5%、1.8%、2.1%和2.4%,对大菱鲆幼鱼(7.14 ±0.04) g进行为期6周的养殖实验。结果表明,随着投喂率的提高,大菱鲆幼鱼特定生长率显著升高(P P >0.05)。饵料系数随着投喂率的增加呈现出先降低再升高的趋势,并在投喂率为1.5%时达到最小值,但在1.2%、1.5%和1.8%之间差异不显著(P >0.05)。综上所述,大菱鲆幼鱼在密度为240尾/m3、水温为(13.5 ±0.5)℃流水养殖条件下,适宜的投饲率推荐为1.5%~1.8%。

The experiment was conducted to study the effects ofdifferent feeding rates on the growth and survival rate of juvenile turbot(Scophthalmusmaximus)(7.14±0.04)g underfactory flowing water culture system.The feeding rates were 1.2%,1.5%,1.8%,2.1%and 2.4%,respectively.The results showed that the specific growth rate increasedsignificantly(P P>0.05).With the increase in feeding rate,the feed coefficient decreasedat first and then increased,the lowest value was in the 1.5%group,however,therewere no significant differences among 1.2%,1.5%and 1.8%groups(P>0.05).In conclusion,the optimumfeeding rate of juvenile turbot was recommended as 1.5%-1.8%at a density of240 fish/m3 and a water temperature of(13.5±0.5)?C.