论文部分内容阅读
于1999年9月～2000年6月对日本紫海胆进行了秋季人工育苗培育技术的试验研究。在整个海胆人工育苗全过程中,采取在换水量、投饵量、吸底清污次数及操作管理强度等方面均降低50％的情况下,受精卵孵化率达96.6％(比较组为95.9％),进入附着变态期的八腕后期幼体成活率为80％(比较组为74.4％)。稚海胆壳径达4mm左右进行剥离,成活率为100％,壳径达到10mm增养殖规格的海胆苗种时,其成活率为43.2％。
From September 1999 to June 2000, we conducted a pilot study on artificial breeding of Japanese violet sea urchin in autumn. In the whole process of artificial breeding of sea urchins, the hatching rate of fertilized eggs reached 96.6% (95.9% of the control group) in the case of 50% reduction in the amount of water exchanged, the amount of feeding, the number of suctioning and the intensity of operation and management, ), The survival rate of post-eight-larval larvae entering the attachment metamorphosis was 80% (74.4% in the comparison group). The juvenile sea urchin shell diameter of about 4mm peel, the survival rate of 100%, shell diameter up to 10mm aquaculture specifications of sea urchin seedlings, the survival rate was 43.2%.