サンマ棒受網漁業の漁獲性能に関連する諸要因について

概要

論文の詳細を見る
On the basis of questionnaire returned from about 30 fishing boats which operated for the saury (Cololabis saira) off Northeastern Region in 1950 and 1951, relationship between catch per boat-day and technical factors for fishing such as size of boat, and efficiency of equipments was analyzed. Since saury lift netters are engaged in other types of fishery during the offseason, boat-day catch among competing fishing units may as well be affected by fishermens economic dependency based on annual income for each fishing boat was inquired of, and made available by, fishermen who cooperated in the survey. The study indicated that factors which had a positive correlation with the boat-day catch were the size of boat in term of gross tonnage, economic dependency, powers of fishing light and search light, and size of net (Tables 1 to 3 and Figs. 1, 2). The questionnaire returned revealed that the boat-day catch had a positive correlation with two items out of seven means the fishermen relayed on in choosing a fishing ground for every trip. They were combinations of items 1 and 5, radio broadcast of fishing conditions and data of current and water temperature provided by local service agencies, respectively (Figs. 3 to 5). In locationg a school of fish, advantageous combinations among six technical items inquired of the fishermen were: 2) use of fish finder, 4) detecting an area with a favorable water temperature for the fish, and 5) search for water boundary (Figs. 6 to 8). The results suggest that those boats which combined relatively new kinds of information and more advanced technical means for their use seem to have had a higher catch per boat-day than their fellow fishing boats.
公益社団法人日本水産学会の論文

著者

矢島信一
東海区水産研究所

サンマ棒受網漁業の漁獲性能に関連する諸要因について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク