【摘要】 于1992年2月27日－5月30日在文登市高岛盐场养虾场，对日本刺沙蚕（卵、各期胚胎和幼虫）的纳潮数量和幼虫的沉降进行现场调查和实验研究。结果表明，对养虾生产有意义的纳潮期有3个。3月上旬的新月潮，持续12d，数量为（25－50）×103个／m3，主要组成是受精卵、各期胚胎和担轮幼虫。3月甲旬的满月潮持续7d，数量为（2－5）×103个／m3。4月上旬的新月潮持续8d，数量为（2－3．5）×103个／m3。纳潮量与潮汐关系密切，但与平均潮高无显著的相关。各潮期的纳潮数量比应是4：4：2。对16个纳潮虾池测试的平均沉降量为4492个／m2。据现场调查和实验研究，日本刺沙蚕幼虫的沉降期可划为暂时沉降（5－6刚节）和变态沉降（7—10刚节）。出现暂时沉降（4月15日以后），便可执行纳潮后的排水等虾池早期管理。纳潮的定量监测方法简单、快速和准确，可用来指导虾池的纳潮。更多还原

【Abstract】 A quantitative study using tidal flow to bring eggs, embryos and larvae intothe shrimp ponds at five inlet stations from Wuleidao Bay in the Yellow Sea fromFeb. to May in 1992 showed that three tidal periods are very important for prawnacquacuture. The first period lasting twelve days is at about the new moon in earlyMarch, with 1arval density (25-30)× 103ind/m3. The main developmental stages in-clude fertilized eggs, embryos at different stages and the trochophora. The secondperiod(7 days) is just before and after the full moon in mid-March, with numbersof (2-5) × 103 ind/m3. The dominant stage is the three-setiger nectochaete. Thethird period (8 days) is just before and after the new moon in early April, withdensity of (2-3.5 ) × 103ind/m3. The four-setiger and five~setiger nectochaetes aredomi-nant stages. On the basis of the results of the present investigation, it is sug-gested that the proportion of each tidal flux to bring into the ponds in three tidalperiods should be 4,4, and 2 respectively.The correlation between the density and the mean tidal flood level is not sig-nificant, although the former shows close relationship with occurence of tidal flood.The mean density of settled larvae was 4 492 ind/m2, based on the examination ofsixteen selected prawn ponds. Based on the determination in situ and experimentalobservation, settlement of Neanthes iaponica larvae can be divided into a tempora-tory settled stage from five-setiger to six-setiger nectochaete and the metamorphosissettled stage from seven-setiger nectochaete to ten-setiger juveniles. As the temporarysettled stage occurs(from the mid-April Qnwards) the early management of shrimpponds can be started.The quantitative method of monitoring the eggs, embryos and larvae of Nereids,because of its simplicity, rapidity and accuracy, is applicable to prawn culture du-ring its spawning seasons.更多还原