泥螺室内人工育苗技术的初步研究

PRELIMINARY STUDY ON REARING SPATS OF BULLACTA EXARATA (PHILIPPI)

本文提出了泥螺室内人工育苗各阶段的技术措施,并就如何提高卵群的孵化率、几种药物在育苗中的应用作了扼要讨论。 在人工育苗过程中,0.28—0.9(×10^(-6))高锰酸钾,或5—9(×10^(-6))福尔马林处理卵群,可明显提高孵化率,对卵群膜的溶解有促进作用,并可提高卵群孵化的同步性。在面盘幼虫浮游期及匍匐期的培养过程中,采用0.5—1(×10.(-6))的高锰酸钾或5—10(×10^(-6))福尔马林可以有效地减少育苗水池中的有害微小生物。

Bullacta exarata (Philippi) is monoecious, reproduction is by crossfertilization. The reproduce period is from the end of March to the last ten-days of November along the coast of Zhejiang Province. The fertilized egg is protected by an egg-capsule membrane. After cleavage, it is developed to gastrula,then trochophora larva,which incubates at the viliger larva stage. During artificial spats-rearing,potassium permanganate [0. 28 - 0. 9(×10-6)]can increase hatching rates. During viliger and pediveliger rearing,potassium permanganate [0. 5 - 1 (×10-6)]or formalin [5 -10( × 10-6)] can reduce the amount of destructive microbes and animalcules. In the pediveliger stage,it must put in adherent sea-mud.This paper presents artifical spats-rearing technology in various stages,suggests how to increase hatching rates and discusses the drugs during the rearing period.