2026-03-08T13:35:12Z https://fra.repo.nii.ac.jp/oai

oai:fra.repo.nii.ac.jp:02008072 2025-06-16T06:28:30Z 12:14:1716955731445

砂泥性着底基質の解明(3) Research of Sandy and Muddy Substance for Depositing of Benthic Animals-III 砕波帯沖合部における底質とベントスの関係調査例 An Instance of Research about Bottom Material and Benthos at Off Sea of Surf Zone Yasunaga, Yoshinobu 安永, 義暢 ヤスナガ, ヨシノブ Yasunaga 安永 ヤスナガ Yoshinobu 義暢 ヨシノブ Uekita, Yukio 上北, 征男 ウエキタ, ユキオ Uekita 上北 ウエキタ Yukio 征男 ユキオ 80372019 Higano, Junya 日向野, 純也 ヒガノ, ジユンヤ Higano 日向野 ヒガノ Junya 純也 ジユンヤ 30372056 Akeda, Sadamitsu 明田, 定満 アケダ, サダミツ Akeda 明田 アケダ Sadamitsu 定満 サダミツ metadata only access Field research of bottom material and benthos was conducted at off skore surf zone at Hasaki beach in Ibaragi prefecture in 1984. Samples of bottom material were dredged with S.M sampler for analysis of granule size, rate of silt, ignition loss and composition of benthos. At the same time, stratum echo sounder measurement was done in the same research area to judge relations between results of analysis of bottom materials and response of the surface layer of the bottom. Fine sand zone covered great part of the bottom area less than 30 meters deep. It seemed that response of echo sounder made it possible to presume bottom material i. e. fine sand, granule and silt (more than 50%). Macro benthos was composed of crustacea, vivalves, polychaeta and sipunculoidea, while megaro benthos consisted of crustacea, vivalves and echinodermata. The Number of samples of the former was much greater than that of the latter because of the difference of sampling efficiency between them. The macro benthos of which species was the most was polychaeta, and of which biomass was the most was vivalves. The distribution of each macro benthos seemed to be restricted by conditions of bottom material. 水産工学研究所 National Research Institute of Fisheries Engineering 1987-03 jpn article https://fra.repo.nii.ac.jp/records/2008072 nrife_gd_8_43 https://agriknowledge.affrc.go.jp/RN/2010371945 日本農学文献記事索引(agriknowledge) AN00329681 0389-2344 水産工学研究所技報. 水産土木 Technical report of National Research Institute of Fisheries Engineering. Aquaculture and fishing port 8 20 43 62