栉江珧工厂化育苗技术研究

Study on Industrialized Breeding Technology of Pinna(Atriina) pectinata Linnaeus

通过亲贝强化营养和升温促熟培育,提早栉江珧人工育苗时间;合理控制幼虫密度,前期4-5个/mL,后期2-3个/mL,严把饵料质量关,投喂新鲜无污染的饵料,科学换水与充气,及时分级筛选等系列技术措施,克服栉江珧育苗中易发生幼虫粘连的技术难题,使育苗生产顺利进行;开展了多种附着基投放的采苗方法试验,选出了铺砂浮动网箱采苗和网袋装网片附着基和细砂吊在池中采苗2种比较理想的采苗方法,提高稚贝的附着变态率,其附着变态率达30%以上,促进稚贝的生长和成活,在1 000 m^3水体中育出2 mm以上的稚贝1.096亿粒。

Pinna （Atriina） pectinata Linnaeus could be breeded artificially earlier by means of nutritional enhancement and rising-temperature ripening of the parent shellfish. The larvae were properly controlled at a density of 4-5 ind/ml in the former stage and 2-3 ind/ml in the latter stage and were fed with fresh algae. With a series of measurements on feed quality, water exchanging, aeration, and classified-filtration in larvae, the problem of larva conglutination was solved and the seed production was succeeded. Various cultches were tested to collect spats. The results showed that the floating cage with sand inside and mesh bags with net substrates and sands were satisfactory in collecting spats. By these methods, the attachment and metamorphosis rate was up to 30% plus, the growth and survival were also advanced. Totally 109.6 million spats about 2 mm in shell length were yielded from a water volume of 1 000 m^3.