青蚶人工育苗的初步研究

Study on the technique of artificial reproduction and nursing of Barbatia virescens

2009-2010年,进行了青蚶繁殖习性的观察和人工育苗的初步研究,揭示了青蚶繁殖和胚胎发育的过程。本实验筛选了受精卵孵化、幼虫生长和稚贝附着的适宜环境条件。浙南沿海青蚶的自然繁殖盛期是每年的6-7月,水温为24～28℃。受精卵发育的适宜温度为24～28℃,盐度为22～26,在适宜条件下经过18 h左右发育至D形幼虫。幼虫生长发育的最适宜温度为24～28℃,最适宜盐度为26;幼虫的前期培育饵料以球等鞭金藻为宜;经10～12 d培育幼虫进入变态附着期。质地坚硬表面粗糙的水泥砖较适合稚贝的附着和生长。

The primary observation on propagation and study on artificial reproduction of Barbatia virescens were performed from 2009 to 2010,which revealed the processes of propagation and embryonic development.The feasible environmental conditions for hatching,larval growth and settlement of young shellfish were selected via experiments.The natural breeding season of Barbatia virescens in the south of Zhejiang Province is from June to July,when water temperature is 24-28 ℃.The ranges of suitable temperature and salinity in hatching were 24-28 ℃ and 22-26 respectively,and the initial D-stage veliger appeared about 18 h after fertilization.In D-stage larvae,the feasible temperature range was 24-28 ℃,feasible salinity was 26 in larval growth,and the dainty food was Isochrysis galbana.After about 10-12 days rearing,the larvae develop to the stage of metamorphosis.The hard cement brick with rough surface was suitable for attaching and growth.