2026-03-11T06:37:36Z https://fra.repo.nii.ac.jp/oai

oai:fra.repo.nii.ac.jp:02005120 2025-12-10T01:14:58Z 12:14:1716951205920

ムラサキイガイによる餌粒子の選択についての一検討方法（予報） A PRELIMINARY NOTE ON SELECTION OF FOOD PARTICLES BY MUSSEL MYTILUS Umezu, Takeshi 梅津, 武司 ウメヅ, タケシ Umezu 梅津 ウメヅ Takeshi 武司 タケシ Ueda, Kazuo 上田, 和夫 ウエダ, カズオ Ueda 上田 ウエダ Kazuo 和夫 カズオ Furukawa, Atsushi 古川, 厚 フルカワ, アツシ Furukawa 古川 フルカワ Atsushi 厚 アツシ metadata only access The content found in the alimentary canal of filter feeding organisms may reflect the composition of suspended matters in the surrounding water. Some differences, however, were observed between the content and the suspension, and the main reason for this discrepancy could be caused to selection in feeding by animals, such as the majority of lamellibranchs. Some experiments were carried out to estimate selection of food by mussel with phytoplanktons, Dunaliella, Nannochloris and Phaeodactylum tricornutum, which were labeled with ³²P. The cell numbers in pseudo-feces were measured after feeding the cells of various concentrations to the individual mussel. Feeding rate and retention rate were estimated, after several groups of large and small five mussels were fed the single or two species. The following procedures were examined. 1) The pseudo-feces excreting minimum concentrations and the percentage of pseudo-feces to total uptake might depend on different species of foods. 2) The feeding or filtering rate may vary with kinds of particles. 3) The amount of cells retained on the external organs, which rejected and swallowed in part, may be influenced with the different species. But relationship between formation of pseudo-feces and respiratory function was not considered. Under the experimental conditions, it seemed that mussel showed some selectivity or preference for the particles, when two kinds of particles were available simultaneously. ³²Pで標識した植物プランクトンを用いて,ムラサキイガイの擬糞形成の最低細胞濃度,総摂取量に対する擬糞量の割合,また沪過率および外部器官によって保持されている率を測定することにより,餌に対する選択を予備的に検討した。その結果,Dunaliella と Phaeodactylum とでは擬糞形成のようすが多少異なるようであり,Dunaliellaと Nannochloris とでは沪過率および保持されている率で多少違いが見られるようであった。擬糞形成を呼吸との関係からも検討し,貝の摂餌条件,内的条件を一定にし,細胞数測定の精度をあげ,また多数の個体についての結果を統計的に処理すれば,以上述べた方法で貝による餌の選択性を検討できるように考えられる。 内海区水産研究所 Naikai Regional Fisheries Research Laboratory 1967-03 jpn departmental bulletin paper https://fra.repo.nii.ac.jp/records/2005120 nai_k_2402 https://agriknowledge.affrc.go.jp/RN/2010841512 日本農学文献記事索引(agriknowledge) AN00176718 0497-5022 内海区水産研究所研究報告 Bulletin of Naikai Regional Fisheries Research Laboratory 24 10 11 20