著者

山中 亮一 上月 康則 野上 文子 魚谷 昂一郎 三好 真千 五島 幸太郎

出版者

公益社団法人 土木学会

雑誌

土木学会論文集B2(海岸工学) (ISSN:18842399)

巻号頁・発行日

vol.68, no.2, pp.I_1206-I_1210, 2012 (Released:2012-11-15)

参考文献数

12

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Mytilus galloprovincialis (mussel) is a dominant species that attach to seawalls in eutrophied enclosed ports in Japan. Mussel drop-off occurrs every summertime causing sediment contamination at the sea bottom. To avoid the occurrence of mussel drop-off, we suggest to harvest an attached mussel just before the drop-off and composting it. To predict the occurrence of the mussel drop-off, we have to investigate it's biological reaction to influential factors, especially water quality variation. Therefore, we conduct the field observation and reaction experiment of mussels. As a result, we clarified that adhesion characteristics of mussels are affected by the pattern of water quality variation and caused by internal seiche which improves the number of byssus of the mussels.

著者

三好 真千 上月 康則 山中 亮一 山口 暢洋 坂下 広大 田中 千裕 山口 奈津美

出版者

Japan Society of Civil Engineers

雑誌

土木学会論文集B2(海岸工学) (ISSN:18842399)

巻号頁・発行日

vol.65, no.1, pp.1246-1250, 2009 (Released:2010-03-05)

参考文献数

7

被引用文献数

1 1

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Large volume of mussels attaches on the coastal structure in eutrophic area. The dropped and died mussels accelerate the depression of dissolved oxygen in the bottom layer. This study revealed the relationship between fluctuation of salinity and temperature and their attaching activity on the wall. Result of our investigation at Amagasaki Harbor in Osaka Bay showed that the mass of mussels dropped out at the bottom after the salinity and temperature had extensively changed. It was also observed in Komatsushima Harbor that the salinity and temperature jumps initiated the dropout of the mussel. From laboratory experiments in different environmental conditions; salinity and temperature, we cleared the ecological cycle of the mussels in which the changes in salinity and temperature mainly influenced their activities.