方格星虫苗种池塘中间培育试验研究

2008年8月19日至2008年10月22日在广西海洋研究所进行方格星虫(Sipunculus nudusLinnaeus)中间培育阶段苗种的生长及成活率的影响试验。试验共设3种不同的池塘底质,分别是海泥沙底质(1#)、中细河沙底质(2#)和中细河沙加配合饲料底质(3#),每口池塘面积0.2hm2,平均播苗密度为每公顷600万条。试验结果表明,中细河沙加饲料底质(3#)的池塘中培苗种生长速度最快,成活率最高,出苗数量最多,而中细河沙底质(2#)池塘的中培苗种次之,海泥沙底质(1#)池塘的中培苗种相对较差。1#、2#、3#池塘方格星虫苗种成活率分别为56.3%,78.%,80.2%,出苗数量分别为67.6万条、93.6万条、96.2万条。铺设适宜底质,投喂适量人工饵料,是提高方格星虫池塘中间培育技术的重要因素。

Experiment of Intermediate Culture of Sipunculus nudus Linnaeus Seed in Pond

A growth experiment was conducted to evaluate the effects of different substrates of pond on the growh and survival of Sipunculus nudus Linnaeus in intermediate culture stage.The experiment was carried out in Guangxi Marine Research Institute from August 19,2008 to October 22,2008.Three different substrates were performed in sea sediment（1#）,medium-fine river sand（2#）and medium-fine river sand added feed（3#）.Sipunculus nudus Linnaeus seeds were moved to the three different ponds（0.2hm2）with the density of 6 million per hm2.The results showed that the seeds cultured in 3# pond had the highest growth,survival and final yield.The group cultured in 2# pond followed and the Sipunculus nudus Linnaeus cultured in 1# pond showed relatively poor performance.The survival rates were 56.3%,78.% and 80.2%,respectively.The final-yields were 0.676 million,0.936 million and 0.962 million,respectively.The results indicated that the optimal substrate and feed were important to improve Sipunculus nudus Linnaeus＇s intermediate culture.