東京港におけるムラサキイガイ仔貝の季節変動

概要

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A large bed of marine mussel, Mytilus edulis galloprovincialis LAMARCK, has formed in the intertidal zone of Tokyo Bay. In studying the ecology of the mussel in Tokyo Bay, the seasonal occurrence of planktonic larvae an the settlement of young mussels were investigated. Hydrozoa was used as a natural substratum. As an artificial substratum, a rope collector made of filaments of vinilon rope was used. Planktonic larvae appeared all through the year except during the season from late June to September, with the peak in late March. The kinetics of settlement on hydrozoa and the rope collector was almost the same as that of the appearance of planktonic larvae, with the peak in late April. A few settlements were observed on the hydrozoa and the rope collector during the summer. Most settlements on the rope collector were observed at a depth of 2m below CD. As a substratum for primary settlement, the rope collector seems to be very useful for monitoring the seasonal occurrence of young mussels.
公益社団法人日本水産学会の論文