对虾育苗期聚缩虫及其附着基研究

STUDIES ON ZOOTHAMNIUM SP. AND IT'S ADHESIONS IN PENAEUS HATCHERY

以生物生态学方法,采用生物和非生物等10种附着基经人为投入虾苗池,预防斑节对虾(penaeus monodon)和长毛对虾病害,结果细基江蓠繁枝变种聚缩虫附着率较高,能相应减少幼虾体上的聚缩虫。试验表明,人为投入附着基,能使水质有害因子大为减少。显示出生物生态防治虾病良好的开端。

Zoothamnium is one kind of comensal Peritriches on penaeus. They don't directly do harm to the host tissuses which they adhere to. Only when a lot of Zoothamnium adhere to the surface of penaeus do the parasites the breathing and feeding and feeding and ecdysising and moving of the host. Zoothamnium is ubiquitous in the costal penaeus hatchery, seriously intimidate the penaeus hatchery production. This experiment was conducted to seek new adhesions which are suitable for Zoothamnium to adhere to. Ten adhesions have been used for this study in the first stage. The results show that Gracilaria tenuistipitata is just the adhesion that we were looking for! Then, this kind of seaweed was used in the second stage to find wheather it's prevention efect against penaeus disease is remarkable or not. According to the experimental results, the infection ratio in the reference pond is 85.6％ but only 14.7％ in the test pond. Hanging up a suitable sum of Gracilaria in penaeus hatchery pond is a new ecological prevention method against penaeus disease causing by Zoothamnium.