海珍品综合增养殖中的种间关系和生态容纳量的研究

STUDY ON THE INTERSPECIFIC RELATIONSHIP AND ECOLOGICAL CAPACITY IN RARE MARINE ANIMALS CULTURE

在长岛县砣矶岛进行海珍品综合增养殖技术研究时，对几种海珍品的种间关系和生态容纳量做了调查与试验。结果发现，大型海藻的着生量与以此为主要饵料的皱纹盘鲍、光棘球海胆等的密度大体平衡。只是海胆密度是鲍密度的10几倍。因此为了提高单位水体的经济效益，应抑制海胆密度的增长。若能使5米以浅水域的海胆密度减其半，则该水域里的鲍产量可以增加到5倍之多。利用筏式养殖扇贝所排放的贝粪、拟粪做为饵料来增殖剌参，可使刺参的资源量增加3倍，即由原来的132．8kg／亩，增至526．4kg／亩。为此在放流苗种的同时，应向泥砂及平板礁等底质投置增殖礁，为鲍和剌参提供更多的栖息场所。

While studying the culture tecnniques for rare marine animals and algae, we investigated the interspecific relationship and ecological capacity of rare marine animals.It was discovered that the biomass of macroalgae equaled the densities of Haliofels discus hannai and Anchocidaris crassispina that fed on the macroalgae,only the density of the latter was over ten times higher than that of the former.To improve the economical benefit, the density of Anchocidaris crassispina has to be controlled. If its density can be reduced by 50% in an area with water depth less than 5m, the population of Haliotels discus hannai can increase more than 5 times. Using the true-faeces and the pseudofaeces of scallops in cultivation by rafts as the food of Stichopus japonicus, its biomass increased from 132. 8kg/mu. to 526 .4kg/mu. Therefore it is advisable to posit reefs to provide more habitat for Haliotels discus hannai and Stichopus japonicus while releasing seedlings.