@article{oai:nagasaki-u.repo.nii.ac.jp:00017753,
 author = {大畑, 聡 and 池上, 直也 and 仲村, 文夫 and 藤田, 薫 and 松下, 吉樹},
 issue = {1},
 journal = {日本水産学会誌, Bulletin of the Japanese Society of Scientific Fisheries},
 month = {Jan},
 note = {マアナゴの漁獲を維持しながらマコガレイ小型魚の混獲を防ぐために,小型底びき網のコッドエンド下部に,水平のバーを配列したグリッドを取り付けた漁具を開発した。そして,バー間隔13,15,20,24mmで曳網試験を実施し,マコガレイとマアナゴに対するグリッドの選択性を調べた。両種に対するグリッドの選択性は,魚体の鉛直方向の厚みとバー間隔の比および魚のグリッドに対する反応という2つの要因を合わせることにより表現できた。また,マコガレイ小型魚がグリッドから逃避する割合は,バー間隔15,20mmでそれぞれ4割,6割と考えられた。, Selectivity of a grid separator for marbled flounder Pleuronectes yokohamae and white-spotted conger Conger myriaster was estimated to reduce bycatch of juvenile marbled flounder while retaining commercial sizes of white-spotted conger. Four different grids made of horizontal bars (13, 15, 20 and 24mm bar spaces) fixed on the belly of the codend were tested at sea from 2002 to 2004 to develop a measure for redecing bycatch. An external covernet was attached behind the grid to catch all fish that escaped through the grid. We used three different models (logistic, Richards, and contact-logistic models) to describe grid selectivity. The contact-logistic model was chosen as the best-fit model for marbled flounder and white-spotted conger. Grid selectivity was expressed as the ratio of vertical size of the fish body to bar space for both species. Under the test conditions, we considered that a grid of 15mm bar space reduced juvenile discards of marbled flounder by 40% and caught most of the white-spotted conger., 日本水産学会誌 = Bulletin of the Japanese Society of Scientific Fisheries. 2008, 74(1), p.39673},
 pages = {8--13},
 title = {東京湾の小型底びき網におけるグリッドの選択性},
 volume = {74},
 year = {2008}
}