【摘要】 2017年9月至2018年1月,在福清东壁岛三联垦区(A、B、C)开展了菲律宾蛤仔垦区人工育苗技术研究,其中A、B垦区用于育苗,C垦区用于饵料培育,并于2017年9月开始分两批次共向A、B垦区投放菲律宾蛤仔亲贝1 670 t。结果显示,育苗期间菲律宾蛤仔亲贝共出现4次大规模产卵。亲贝精卵排放率为32. 0%～84. 0%,孵化率为45. 00%～68. 54%;浮游幼虫生长速度为4. 73～7. 14μm/d,变态率为28. 37%～59. 67%;稚贝壳长生长速度为7. 08～25. 10μm/d,共培育砂粒苗7 580亿粒,育苗成活率为50. 23%。因此,采用垦区三联方法可保障菲律宾蛤仔苗种的生物饵料供给,从而提高砂粒苗的生长速度和成活率。更多还原

【Abstract】 From September 2017 to January 2018,the experiment on artificial seedling technology,or so called triple flat method,for Malina clam( Ruditapes philippinarum) was carried out in diked tidal flats of A,B and C in Dongbi Island of Fuqing. The flats A and B were used for seedling cultivation and C for food cultivation. A total of1 670 tons of Malina clam were put into the flats A and B in September 2017,and four large-scale spawnings occurred during the seedling period of the parent clams. Results showed that the sperm and egg emission rates of parent clams were 32. 00%-84. 00% and the hatching rates were 45. 00%-68. 54%,respectively. The growth rates of planktonic larvae were 4. 73-7. 14 μm/d. The attachment metamorphosis rate was 28. 37%-59. 67%.The growth rate of juvenile shells was 7. 08-25. 10 μm/d. As results,758. 0 billion grain-size seedlings were cultivated with a survival rate of 50. 23%. Therefore,the triple flat method in reclamation area could improve the biological feed supply,the growth rate and survival rate of seedlings.更多还原