大竹蛏稚贝潜砂行为的研究

实验室条件下,研究大竹蛏稚贝的潜砂行为及稚贝规格对潜砂的影响。结果表明,大竹蛏稚贝的潜砂行为可分3个阶段:准备期、潜砂期及结束期。大竹蛏稚贝在壳长3.00～8.50 mm内,规格对潜砂准备时间、潜砂时间及潜砂行为的影响极显著,随着规格变大其潜砂准备时间逐渐降低(10.7～4.0 s);潜砂时间则表现为先降后升,壳长(6.20±0.04) mm组的稚贝潜砂时间最短,约9.7 s;各规格组稚贝的潜沙率均为100%,壳长(5.18±0.11) mm组潜砂率100%且用时最短。建议在大竹蛏增养殖过程中,投放苗种规格宜大于5.00 mm。

Burrowing Behavior and Ability of Razor ClamSolengrandis with Different Shell Length

The burrowing behavior and ability of razor clam Solen grandis with different shell length were researched in a laboratory. The results showed that the behavior of the burrowing into the sandy sediment can be divided into three stages: preparation period, burrowing period and terminal stage. In the different shell-length of 3.00 mm to 8.50 mm of S. grandis ,the influence of the size on the burrowing behavior was very significant, the preparation-time of burrowing behavior gradually decreased (10.7-4.0 s) as the specification larger. The burrowing time was decreased and then increased, the group of 6.20 mm with the shortest burrowing time (about 9.7 s). The sand-diving rate of each size group was 100%. The burrowing time of 5.18 mm group was the shortest when burrowing-rate was 100%. It is suggested that in the process of increasing culturing of S. grandis , the seedling size should be over 5.00 mm.