Migration and settlement of puerulus of spiny lobsters in southern hemisphere

多刺龙虾的幼虫孵化为叶状体，约一年后变形为叶状体。由于在实验室培养叶状体和在海洋中捕获紫菜的困难，特别是早期紫菜一直是棘龙虾生活史中缺失的一环。在新西兰的卡斯尔波因特，观察到了一些爱华茉莉（Jasus edwardsii）的葛根。另一种Jasus verreauxi分布于新西兰北方和澳大利亚新南威尔士州南部海岸。我们进行了调查，以找到迁移和定居的puerulus siny龙虾。白柏定居点的季节变化。1991年1月和2月，Booth型收集器收集的pueruli和postpueruli总数分别为198和47，18天，12个收集器; 11月和12月，20个收集器收集的pueruli和postpueruli总数分别为40和13。春季和夏季相比，葛根的沉降量要高得多.分布式路由 ...更多信息 靠近海岸的一片葛根。退潮时，在海滩的石头下发现了大量的葛根。2月共收集了755个结石中的106个pueruli和13个postpueruli。用收集器在Castlepoint Inlet口部的中间深度收集了一些葛根。在入水口的桑迪底用橇网采集一株葛根.葛根肝胰腺的形态学变化。肝胰腺在肝叶形成早期是不可见的。晚期可见一对白色器官。组织学观察发现，肝胰腺前叶顶端有脂肪沉积。中期以后，肝胰腺细胞中开始出现脂肪。葛根的穴居行为。在卡斯尔波因特的含盐沙地上，葛根表现出穴居行为。早期幼叶易潜穴，晚期幼叶和幼叶后幼叶不能潜穴。白泥蛤白天钻泥，天黑后出泥。少

The larvae of spiny lobsters hatch out as phyllosoma and metamorphose into puerulus after about a year. Because od difficulties to culture phyllosomas in laboratory and to capture pueruli in the ocean, the puerulus particalarly at the early stage has been a missing link of the life history of spiny lobsters. A number of puerulus of Jasus edwardsii was observed to settle at Castlepoint, New Zealand. Another species Jasus verreauxi occurred in the northern part of New Zealand and southern coast of New South Wales, Australia. We have carried out the survey in order to find migration and settlement of puerulus of siny lobsters.1. Seasonal change of puerulus settlement for J. edwardsii. Total number of pueruli and postpueruli collected with Booth type collectors were 198 and 47 for 18 days with 12 collectors in January and February, and 40 and 13 for 10 days with 20 collectors in November and December 1991. Settlement of the puerulus was much higher in summer compared to spring.2. Distribut … More ion of the puerulus near shore. A number of puerulus was found under the stones on sand beach at low tide. A total of 106 pueruli and 13 postpueruli was collected under 755 stones in February. A number of puerulus was collected at the middle depth of the mouth part of Castlepoint Inlet with collectors. A puerulus was sampled with sledge net on the sandy bottom in the inlet.3. Morphological change of hepatopancreas of the puerulus. The hepatopancreas was not visible for the early stage of the puerulus. It became visible as a pair of white coloured organ at the advanced stage. From histological examination storage of fat was observed at the tip of anterior lobe of the hepatopancreas for the early stage puerulus. The fat was found in the cells of the hepatopancreas after the mid-stage.4. Burrowing behaviour of the puerulus. The puerulus showed the burrowing behaviour on the salty sand at Castlepoint. The early stage puerulus burrowed easily, but the late stage puerulus and postpuerulus could not burrow. The pueruli burrowed into silt at daytime and emerged after dark. Less