不同投饲率对陆基圆池养殖大口黑鲈生长及养殖效能的影响

Effects of different feeding rates on growth and efficiency of land-based circular pond culture Micropterus salmoides

为探究陆基圆池养殖条件下大口黑鲈适宜的日投饲率,试验设置1.6%、1.9%、2.2%、2.5%和2.8%等5个投饲率,实验池水温24.8~26.5℃,以研究不同投饲率对初始体质量为(116.00±10.68)g的大口黑鲈生长及主要养殖效能的影响。结果表明,大口黑鲈的体质量日增重率、特定生长率和单位面积产量均为B5组(日投饲率2.8%)最高,其次为B3组(日投饲率2.2%);饲料系数和变异系数组间差异不显著(P>0.05)。基于主要生长指标和养殖效能参数的综合评价,在陆基圆池养殖条件下,初始体质量为(116.00±10.68)g的大口黑鲈日投饲率以2.2%为宜。

In order to investigate the optimal daily feeding rates of Micropterus salmoides in land-based circular pond culture,five feeding rates were set as 1.6%,1.9%,2.2%,2.5%and 2.8%,and the water temperature of the experimental pond was set as 24.8℃to 26.5℃.The effects of different feeding levels on the growth and main breeding efficiency of M.salmoides with initial body weight of(116.00±10.68)g were studied.The results showed that the daily weight gain rate,specific growth rate and output per square meter were the highest in B5 group(daily feeding rate 2.8%),followed by B3 group(daily feeding rate 2.2%).There were no significant differences in feed conversion ratio and coefficient of variation between groups(P>0.05).Based on the comprehensive evaluation of main growth indexes and breeding efficiency parameters,the optimal daily feeding rate of M.salmoides with an initial body weight of(116.00±10.68)g was 2.2%in land-based circular pond culture.