筏养参数对浙江枸杞岛海域紫贻贝生长效果的影响效应

Study on Scientific Technology of Culturing Mytilus edulis in Gouqi Sea Area of Zhejiang Province

为了探索紫贻贝海区养殖技术,促进紫贻贝高产高收,以紫贻贝为研究对象,进行海区养殖技术研究。在挂养密度、挂养间距不同条件下,对紫贻贝进行了大量的试验。对紫贻贝在挂养密度梯度(1 600粒/串、1 800粒/串、2 000粒/串、2 200粒/串、2 400粒/串)、挂养间距梯度下(50 cm、70 cm、90 cm)的不同生长指标(生长率、增重率)的测定结果显示,随着挂养密度、挂养间距的逐渐增大,紫贻贝的平均生长率、平均增重率大致呈现递减的趋势,低密度养殖的个体呈现出了更高的生长率,与挂养密度、挂养间距相关的生长差异可能暗示因资源受限(生长空间、食物等因素)而出现种间竞争,因此要进行紫贻贝科学化养殖,必须采用一个不影响贻贝生长性能且较高挂养密度、挂养间距梯度进行养殖,同时综合考虑紫贻贝的商业效益,应选择挂养密度为2 000粒/串,挂养间距为70 cm为宜。

In order to improve the high yield and high efficiency of mussel, which should explore the aquaculture technology of Mytilus edulis. The seeds of M. edulis were adopted to study the technology in sea area. Lots of experiments were conducted to study in the different condition of culturing density and culturing distance. The different growth index（growth rate, growth rate） of mussel were determined in a culturing density gradient（1 600 grains per string, 1 800 grains per string, 2 000 grains per string, 2 200 grains per string, 2400 grains per string）, culturing distance gradient（50 cm, 70 cm, 80 cm）. The results showed that with the in-creasing of culturing density and culturing distance, the average growth rate and average growth rate of mussel had generally decreasing. Low density of individuals showed a higher growth rate. The differences in the growth with culturing density and culturing distance may indicate that the limited resources（growth space, food and other factors） led to the emergence of interspecific competition. Therefore, scientific technology of culturing M.edulis should be studied by high culturing density and culturing distance, considering the commercial benefit of M. edulis, we should choose culturing density of 2 000 grains per string, culturing distance is 70 cm.