2026-03-08T05:03:32Z https://fra.repo.nii.ac.jp/oai

oai:fra.repo.nii.ac.jp:02011706 2026-02-10T01:58:24Z 1:6:1724312743129

障害物の明暗がアンドンクラゲの遊泳行動に及ぼす影響 Effect of comparative lightness of obstacles on swimming behavior of Carybdea rastoni (cnidaria; cubozoa) Ueno, Syunshiroh 2894 上野, 俊士郎 ウエノ, シュンシロウ Mitsumori, Shin-Ichi 3003 光森, 心一 ミツモリ, シンイチ Noda, Mikio 1259 野田, 幹雄 40399663 ノダ, ミキオ Ikeda, Itaru 1258 池田, 至 20399661 イケダ, イタル The cubic medusa, Carybdea rastoni, is often observed to avoid from obstacles in the field. However, C. rastoni often strikes itself against the walls of rearing tanks so that it is difficult to rear C. rastoni for a long time. In order to solve this behavioral difference we carried out laboratory experiments. The striking frequency of C. rastoni on sheets of different lightness, which were attached on the wall of the tank, was counted. In all experiments, medusae struck more frequently on the greyish sheets than black or white sheet. Medusae might regard the greyish sheets as the horizontal extension of seawater and, on the other hand, black or white sheet as obstacles, e.g., shore, boats, ropes, and bottom sand etc. These results suggest that C. rastoni is well adapted to coastal waters with many obstacles. We also could successfully keep C. rastoni medusae for sixty days in a rearing tank, when the walls were painted black. departmental bulletin paper 水産大学校 National Fisheries University 2000-01-28 水産大学校研究報告 3 48 255 258 Journal of National Fisheries University AN00124678 0370-9361 https://fra.repo.nii.ac.jp/records/2011706 jpn fishu_k_48_255 日本農学文献記事索引(agriknowledge) https://agriknowledge.affrc.go.jp/RN/2010612460 open access