皱纹盘鲍与光棘球海胆越冬期筏式混养的初步研究

A preliminary study on ocean-based polycultivation of abalone (Haliotis discus hannai) and sea urchin (Strongyloccntrotus nudus)in ovcrwintor pcriod

实验分越冬前期和越冬后期两个阶段进行。越冬前期鲍与海胆在生长方面的结果无显著差异，但混养可防止苔藓虫的附着，海胆的混养效果以２０个／格略好；越冬后期海胆混养的密度则以５个～１０个／格为最佳，混养可有效地防止多种敌害生物附着。

The experiment was carried out in two stages,the earlier overwinter stage and the later overwinter stage.During the former stage,there was no notable difference,and polycultivation could prevent the encrustment of Bryozoa,with the better result obtained at the rate of 20 polycultivated individuals of sea urchin per shelf;5 individuals per shelf turned out to be the best polycultivation density for the later overwinter stage,which could effectively prevent the fouling of many kinds of harmful organism.As far as the growth of abalone and the antifouling effect were concerned,the best polycultivation density for sea urchin during the overwinter period was found to be 510 individuals per shelf.