中文摘要：

为了给北方海水鱼虾蟹类育苗增添一种新的生物活饵料,利用循环水培养装置研究了西藏拟溞Daphniopsis tibetana Sars在稀释海水（盐度为18~20）中规模化培养的技术工艺参数,即起始放养密度、充纯氧和日采收率。结果表明：起始放养密度对西藏拟溞种群增长和日产量影响显著（P〈0.05）,不同起始放养密度（200、550、900、1250 ind./L）培养试验中,放养密度为1250ind./L时,培养第33天时种群密度达最高,为（9500±550.73）ind./L,平均日产量为（125.00±8.35）g/（m3·d）;充纯氧与充空气相比较,充纯氧能显著提高种群密度和日产量（P〈0.05）,当放养密度为1250 ind./L、充纯氧时,西藏拟溞种群密度最高达（11 600±560.45）ind./L,平均日产量为（156.82±8.49）g/（m3·d）;日采收率对西藏拟溞的种群增长和日产量也有显著影响（P〈0.05）,日采收率为20%时最佳,放养密度为1250ind./L、日采收率为20%时,西藏拟溞种群密度最高为（12 900±995.04）ind./L,平均日产量为（176.52±15.08）g/（m3·d）。

英文摘要：

In order to supply a new live animal food for the marine fish larvae,shrimps and crabs,in this study,process parameters of the large-scale culture of water fleas Daphniopsis tibetana in dilute seawater（ salinity 18-20）was studied by a circle water culture device,including the initial stock density,pure oxygen and daily harvesting ratio. The results showed that initial stock density had a major influence on population growth and daily production（ P〈0. 05）,under the different stock density culture condition（ 200,550,900,1250ind. /L）,the maximal density of D. tibetana population was（ 9500 ±550. 73）ind. / L in 33d when the initial density was 1250ind. / L and the average daily production was（ 125. 00 ±8. 35）g /（ m3·d）. Comparison of pure oxygen and air,filling with pure oxygen significantly improved the population density and daily production（ P〈 0. 05）,with the maximal density of（ 11 600±560. 45）ind./L and the average daily production of（ 156. 82±8. 49）g /（ m3·d） at the initial stock density of 1250ind./L. The daily harvesting ratio showed significantly influence on population growth and daily production（ P〈0. 05） with the optimum harvesting ratio of 20% at the initial stock density of 1250ind. / L,the maximal D. tibetana population density of（12 900 ± 995. 04）ind. / L and the average daily production of（ 176. 52±15. 08） g /（ m3·d）.