栉孔扇贝Chlamys farreri(Jones et Preston)是我国北方广泛养殖的珍贵贝类之一。随着生产的发展,对于栉孔扇贝的苗种需求量愈来愈大。自1974年以来,虽然许多单位对扇贝的人工育苗进行了试验,基本弄清了育苗的规律,但总的来说,仍然存在着单产量较低,生产不稳定等问题。影响扇贝育苗成败的因子很多。本文仅探讨不同饵料的育苗效果。
The food value of five clones of Haptophyceae,Coccolithus pelagicus, Dicrateria zhanjiangensis, Isochrysis galbana, Tahitian Isochrysis aff. galbana, and Pseudoisochrysis paradoxa were tested for larval Penaeus orientalis. The algae were semicontinuously cultured in 5,000ml carboys with 4,000ml of Guillard f/2 medium, under 2,000lux continuous light and under aeration. The algal density was up to 1×10^7cell/ml. Rearing experiments were conducted in round tanks with diameter of 45cm. Algal density was controlled to 1～10^5cell/ml in the course of the experiments. The larval density was 18 individual/100ml, water temperature 21-24℃, pH 7.5-7.7, sea water specific gravity, 1.019. The results showed that of the five clones used,Tahitian Isochrysis aff. galbana and Dicrateria zhanjiangensis proved to be thebesto It took 9-11 days for nauplius Ⅵ to develop into mysis I with survival rate of 73.5% and 73.4% respectively.
