On the Composition for mussel, Mytilus galloprovincialis, Association and the Dropout Process

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  • ムラサキイガイの群集内構造と脱落過程に関する一考察
  • ムラサキイガイ ノ グンシュウ ナイ コウゾウ ト ダツラク カテイ ニ カンスル イチ コウサツ

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The invasive mussel dominates the vertical seawall structure which composes much of the coast. A large volume of oxygen is consumed after dropping the mussels themselves to the bottom during the summer period. In this research, it was suggested the inhabiting situation at inside of the mussels association. The inside association was composed by young shells. They are less 20 mm of body size. The obesity rate is lower and the mortality rate is higher than the outside. The cause of dropout was considered for constructing the multi layered mussels on the seawall. The inside of association becomes heavy condition for living. With the changes in temperature and salinity, some individuals at inside association decrease adhesive to the seawall, and drop out with the integrated living mussels.



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