Abstract
Understanding pelagic larval dynamics is fundamentally necessary for biological conservation in marine biology. We analyzed larval transportation and recruitment of the land hermit crab Coenobita brevimanus during July 2010 in Amitori Bay on Iriomote Island by performing particle tracking analysis based on field observations of larval releases and weather conditions. Larval release was observed for several days before and after the new moon between July and September. It coincided well with the nighttime high tide. During July 10–14, 2010, it was estimated that 39 females released 780,000 zoeae. An average of about 10% of the larvae remained in the area near the release site. Many larvae were transported outside the bay rather than returning to the population. Therefore, the population of C. brevimanus in Amitori, which consists of many large crabs, is regarded as important as a source of recruits for adjacent habitats.
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