论文部分内容阅读
对大连沿海牡蛎主养区发生的太平洋牡蛎Crassostreagigas大量死亡的原因进行了调查研究与分析,发现其大量死亡的主要原因是:单一养殖品种养殖密度过大,超负荷养殖;养殖区水环境恶化,生态平衡被破坏;繁殖季节养殖对象生理活性降低,呈现繁殖生理障碍;附着生物特别是真枝螅在鳃上的大量寄生;养殖工艺及作业方式不完善等。
The causes of large-scale death of Pacific oyster Crassostreagigas occurred in the coastal oyster habitat of Dalian were investigated and analyzed. The main causes of large-scale death of Pacific oyster were found as follows: the breeding density of single species was too large and over-breeding; the water environment in the culture area deteriorated, The ecological balance is destroyed; the physiological activity of the breeding object is reduced during the breeding season, showing the physiological obstacle of reproduction; the attached organism is in particular the massive parasitic on the gill of the branch tree; the breeding process and the operation mode are not perfect.