Studies on Selective Capture Process of Trawl-net Fishery.

拖网渔业选择性捕捞过程的研究。

• 批准号: 03454084
• 负责人: MATUDA Ko
• 金额: $ 4.03万
• 依托单位: Tokyo University of Fisheries
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03454084/
• 关键词: trawl fishery; selectivity; selective fishing; fish behavior; shrimp; discarded fish; grid separator trawl; marine garbage pollution; グリッド式; マナゴ; シャコ

1) Discarded issues of trawl fishery were examined, selective fishing, one of the policies were received.2) We obtained Mesh selectivities of small-size shrimps, for which fisherman use the codend of small-sizemesh.3) Mesh selectivity for unmarketable trash fish were obtained, and it was proved that mesh selectivity for fish can be expressed as a function of maximum body girth and mesh perimeter.4) The efect of separation between matis shrinp and starfish were examined on small beam trawl fishery in Tokyo Bay. Moreover, the separation between species depends on their swimming power.5) The panel of net through which fish escape are examined with some pokets, small cover-net. Consequently, while most of fish and shrimp escape through upper panel in fornt of codend, some of shrimp throgh side panel.6) The separator trawl with the side codend for shrimp were designed, the effect of separation were examined.7) The fishing experiment of the grid separator trawl were carried out in the Inland Sea of Seto. Thus, the selectivity of grid trawl were obtained for some species. Moreover, grid selectivity depends on bar distance of grid, and body width, we proposed a method of determining selectivity master curve.8) We applied the over-all separation efficiency or Newton efficiency to separation of trawl, showed some example.

1)研究了拖网渔业的弃置问题，选择性捕捞，收到了其中一项政策。2)获得了小虾的网目选择性，渔民使用小规格的网尾。3)获得了非市售垃圾鱼的网目选择性，并证明了鱼的网目选择性可以表示为最大体围和网周的函数。4)在东京湾的小横梁拖网渔业上，考察了小虾和海星分离的效果。此外，物种之间的分离取决于它们的游泳力。5)用一些小盖网来检查鱼逃生的网板。6)设计了对虾分隔式拖网，考察了其分流效果。7)在内海进行了网格式分流拖网的捕捞试验。从而获得了某些物种对网箱拖网的选择性。此外，格栅的选择性依赖于格栅的杆距和网体宽度，提出了一种确定选择性主曲线的方法。8)将综合分离效率或牛顿效率应用于拖网的分离，并给出了实例。

项目成果

Tadashi Tokai, Yasuki Ogawa, Hiroshi Ogawa, Hideo Sakaji, and Ryozo Satou: ""Setonaikai niokeru sakana-ebi-bunri-torouruami no kaihtu no kokoromi" (An attempt to design separator trawl between fish and shrimp in the Seto Inland Sea)" Gyogyou-shigenn-kennk

Tadashi Tokai、Yasuki Okawa、Hiroshi Okawa、Hideo Sakaji 和 Ryozo Satou：““Setonaikai niokeru sakana-ebi-bunri-torouruami no kaihtu no kokoromi”（在濑户内海设计鱼虾分离拖网的尝试）”

東海 正: "瀬戸内海における小型底びき網漁業の資源管理-投棄魚問題と網目規制-" 南西海区水産研究所研究報告. 26. 31-106 (1993)

东海正：“濑户内海小型底拖网渔业的资源管理 - 废弃鱼类问题和网尺寸调节 -” 南西海洋渔业研究所的研究报告 26. 31-106 (1993)。

東海 正,大本茂之,松田 皎: "瀬戸内海における小型底曳網の非有用投棄魚に対する網目選択性 (印刷中)" 日本水産学会誌. 60. (1994)

Tadashi Tokai、Shigeyuki Omoto、Akira Matsuda：“濑户内海小型拖网对无用废弃鱼类的网状选择性（正在出版）”日本水产科学学会杂志 60。（1994 年）。

東海 正・松田 皓: "選択漁具・漁法とは" 全国漁業協同組合連合会 平成3年度資源管理型漁業指導員研究会議資料. 12-16 (1992)

Tadashi Tokai 和 Hiroshi Matsuda：“什么是选择性渔具和捕鱼方法？”全国渔业合作社联合会 1991 年资源管理渔业讲师研究会议材料 12-16 (1992)。

Tadashi Tokai: ""Engann-okiai-sokobikiami-gyogyou no genjyou to kadai, 1. Toukigyo-mondai" (Some issues in the Japanese coastal and/or offshore trawl fishery 1. Discarded fish issues)" Nippon Suisan Gakkaishi, Gyogyou Konwakai Houkoku. 33. 1-12 (1993)

Tadashi Tokai：“Engann-okiai-sokobikiami-gyogyou no genjyou to kadai, 1. Toukigyo-mondai”（日本沿海和/或近海拖网渔业中的一些问题 1. 废弃鱼类问题）” Nippon Suisan Gakkaishi, Gyogyou Konwakai Houkoku