| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
This study aims to elucidate the structures of the Mytilus galloprovincialis (planktonic larvae) and Batillaria attramentaria (B. cumingii, benthic juveniles) metapopulations in Tokyo Bay, where anthropogenic disturbance leads to the frequent disappearance and regeneration of their habitat. The metapopulation structures were assessed using microsatellite markers and no genetic distance (DA) was detected among M. galloprovincialis and B. cumingii populations. The result of NJ trees suggests that there is gene flow between the subpopulations of the west and east coasts, in both species. B. cumingii could maintain similar metapopulation structures in different cohorts, and the M. galloprovincialis metapopulation exhibited structural dynamics. We discuss the relationship between these results and the potential role played by dispersal ability (internal factor) and circulating flow (external factor) in driving these dynamics in Tokyo Bay.
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