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本文报道了有关海胆人工育苗的方法,并对大连紫海胆幼虫的生长发育和变态作了详细描述。大连紫海胆的幼虫可分为,棱柱幼虫、二腕长腕幼虫、四腕长腕幼虫、六腕长腕幼虫和八腕长腕幼虫五个时期。在山东省荣城浬岛海区,大连紫海胆的育苗时间为7—8月。在水温为23—24℃时,自受精卵发育至变态成幼海胆的时间大约需要19—20天。幼虫的饵料以角毛藻为最佳,而幼海胆的饵料早期为底栖硅藻,后期以石药较为合适。
This article reports the method of artificial breeding of sea urchins, and gives a detailed description of the growth and metamorphosis of purple sea urchin larvae in Dalian. Dalian purple sea urchin larvae can be divided into prismatic larvae, two wrist long-larvae, four wrist long-larvae, six wrist long-larvae and eight wrist long-larvae five periods. In Chengdao, Rongcheng, Shandong Province, the breeding time for purple sea urchin in Dalian is from July to August. At a water temperature of 23-24 ° C, it takes about 19-20 days from development of the fertilized egg until metamorphosis of the sea urchin. Larval feeding to Chaetoceros is the best, while young sea urchin feed for the early benthic diatoms, late stone medicine is more appropriate.