缢蛏稚贝优质微藻饵料的筛选

为了筛选缢蛏稚贝的合适饵料及其最优组合投饵方式，比较了8种常见饵料微藻单种投喂和混合投喂对缢蛏稚贝生长的影响．结果显示：单种投喂时，角毛藻和金藻饵料效果最佳，云微藻和XSWG仅次于角毛藻和金藻，对于规格较大的缢蛏稚贝扁藻饵料效果较佳，而对于规格较小的缢蛏稚贝其饵料效果并不太好，这5种微藻都可以作为缢蛏稚贝培育过程中的优良饵料选择：微绿球藻、巴夫藻饵料效果较差，不是缢蛏的良好饵料；而A5不仅对缢蛏稚贝没有饵料效果还具有一定的毒害作用．选择优良饵料微藻进行混合投喂，其效果要优于单种投喂；混合投喂时，一些单种投喂饵料效果不佳的微藻品种可以作为优质饵料不足时的补充；对缢蛏稚贝有毒害作用的微藻品种绝对不能作为混合投喂时的饵料选择．

Screening of High-quality Feed Microalgae in Cultivation of Juvenile Intertidal Shellfish, Sinonovacula constricta

In order to select the appropriate feed and optimum combinational feeding methods of juvenile shellfish, Sinonovacula constricta, the feeding effects of eight common microalgae are compared in this study. The best feeding effects are found in Chaetoceros calcitrans and Isochrysis galbana, followed by YW0980 and XSWG., through feeding with single microalgae. The feeding result of Platymonas helgolandica on juvenile Sinonovacula with larger size is more effective than those with smaller size. All of the five feed microalgae above can be used as good choices during the cultivation of juvenile Sinonovacula. Poor results are identified in Pavlova viridis and Nannochloropsis oculata, which are found to be the inappropriate feed for juvenile Sinonovacula. However, not only little feed effect but also some toxic effect is noted in the microalgae named A5. Relative to those feeding with single microalgae the better effects are achieved in mixed feeding with high-quality microalgae. The experimental results of feeding with the mixed microalgae show that the poor-quality feed microalgae can be used as the supplementary when high-quality feed microalgae is short of supply. Feeding microalgae with toxic substance can not be used as natural food during the mixed feeding cultivation.