养殖密度、水层、规格对浅海筏架吊笼养殖刺参生长的影响

Effect of culture density,size and depth layer on growth of Apostichopus japonicas in shallow cages

在浙江苍南霞关海域研究养殖密度(16.08、21.44、26.80、32.16、37.52 kg·m^(-3))、水层(0.50~1.25、1.00~1.75、1.50~2.25、2.00~2.75 m)、规格[初始个体质量(28.5±2.2)、(35.4±1.7)、(57.0±2.7)g]对浅海筏架吊笼养殖刺参特定生长率和个体质量变异系数的影响,试验持续180 d。结果表明,养殖密度对刺参特定生长率和个体质量变异系数有显著(P<0.05)影响,随着养殖密度增大,特定生长率显著降低、生长变异系数显著增加。在本试验条件下,养殖水层对刺参生长无显著影响。规格显著(P<0.05)影响刺参特定生长率和个体质量变异系数,规格越大,特定生长率越高,个体质量变异系数越低。本试验表明,刺参浅海吊笼养殖密度应控制在26.80 kg·m^(-3)以内,养殖水层以1.50~2.25 m为宜,结合南移养殖实际,建议选择初始个体质量33.3~62.5 g的苗种进行养殖。

In the present study,effects of culture density(16.08,21.44,26.80,32.16,37.52 kg·m-3),depth layer(0.50-1.25,1.00-1.75,1.50-2.25,2.00-2.75 m)and size[initial individual weight(28.5±2.2),(35.4±1.7),(57.0±2.7)g]on specific growth rate(SGR)and coefficient of variation of individual weight(CV)of sea cucumber Apostichopus japonicas were explored.The experiment lasted for 180 d.It was shown that culture density had significant(P<0.05)influence on SRG and CV of sea cucumber.With the increase of culture density,SGR decreased yet CV increased significantly(P<0.05).In this study,culture layer had no significant influence on sea cucumber SRG and CV.However,culture size significantly(P<0.05)influenced SRG and CV of sea cucumber.With the increased culture size,SGR increased yet CV decreased significantly(P<0.05).It was suggested that culture density of sea cucumber should not exceed 26.80 kg·m-3,and the optimum culture layer and initial individual weight were 1.50~2.25 m and 33.3~62.5 g,respectively.