养殖密度、水层、规格对浅海筏架吊笼养殖刺参生长的影响

摘要

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 cul-ture density had significant(P<0.05)influence on SRG and CV of sea cucumber. With the increase of culture den-sity,SGR decreased yet CV increased significantly(P<0.05). In this study,culture layer had no significant influ-ence 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 sug-gested that culture density of sea cucumber should not exceed 26.80 kg·m-3,and the optimum culture layer and ini-tial individual weight were 1.50~2.25 m and 33.3~62.5 g,respectively.%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.