摘要
研究泥蚶人工育苗的若干技术。提出一些高产措施：如优选亲蚶；高密度来卵再分地洗卵、孵化，高密度培育面盘幼虫；无“底质”采集眼点幼虫，细砂（含极少量泥质和有机质）底质培育稚蚶，加大投饵量和换水量；严格防病等。在生产中取得一定的效果，平均单产稚蚶（壳长0．9±0．2mm）32．90万粒／m2，最高单产59．44万粒／m2。
The experiments on juveniles' selection of different substrates reveal that 92. 3% larvae can metamorphose without substrate; when the shell length is lessthan 1mm, juveniles can be cultured within all sand substrates with a survuval rate of 79. 6% and a growth rate of 25. 4μ per day. By menas of experiments and production, this paper studies the techniques for nursing juvenile mud clams, and suggests some high yield measures, such as selecting optimum parent mud clams, collecting eggs at high densities, culturing larvae at high densities, collecting eye-spot larvae with no substrate, culturing juveniles on fine-sand substrate(containing little mud and organic substance), increasing feeding amount and water exchanging rate,and strictly preventing diseases, etc. In large scale production, the average and the highest yield of juviniles (shell length is 0. 9±0. 2mm) is 32. 90×104/m2 and 59. 44×104/m2 respectively.
关键词
泥蚶
人工育苗
高产技术
细砂
Tegillarca granosa
artificial culture of larvae or juveniles
high yield techniques
substrate
fine sand
