相模湾のウミトラノオ葉上にみられるオオシマチグサカニモリの生活史
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概要
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Seasonal changes in the growth and abundance of Ittibittum parcum (Gastropoda: Cerithiidae) living on the brown alga Sargassum thunbergii were studied from January to December 2004 on the eastern coast of Sagami Bay, central Honshu, Japan. The density of individuals reached its maximum in April, and fell to a minimum in May. The plant reached its maximum length in May, and thereafter decreased to reach a minimum in November. These seasonal changes in plant length preceded changes in the abundance of I. parcum by one month. Newly settled juveniles of I. parcum appeared in July, and grew rapidly thereafter. The lifespan of the gastropods was estimated to be one year.
- 2005-12-31
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