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Title: スマトラ南方海域に於ける夏期鮪延繩漁場について
Other Titles: On the Tuna Long-line Fishing Ground in Summer in the Southern Waters of Sumatra
Authors: 阿部, 茂夫 / 矢田, 殖朗 / 高田, 多聞 / 井上, 正六
Authors (alternative): Abe, Shigeo / Yada, Shigeaki / Takada, Tamon / Inoue, Shoroku
Issue Date: Oct-1965
Publisher: 長崎大学水産学部
Citation: 長崎大学水産学部研究報告, v.19, pp.47-51; 1965
Abstract: A remarkable progress is now being made in the tuna long-line fishery in the Pacific, the Indian and the Atlantic Ocean, but very few studies have been reported on the fishing conditions of local seas. The training ship of the Nagasaki University Faculty of Fisheries "Nagasaki Maru" made fishing exercises, maritime investigation and fishing examination in the southern waters of Sumatrka in August, 1964. A few data obtained from the experiments will provide some information for the future studies on this area on which few reports have ever been published. Therefore we report here some results from the collected data. 1. The border of the tide caused by the summer monsoon and the area where the tideway is unsettled lies rear a place about 94°E, 4°S. However, it is thought to undergo a considerable variation by the force of the monsoon tide. 2. The hooked-rate is high at 20-23℃, and remarkably low above 23℃ of the water temperature in the 100-m layer. 3. The hooked-rate is lower in the area on the tide-border where a steep vertical distribution of isotherms is observed, and higher in the area away from the tide-border where the isotherms are comparatively parallel. 4. In the southern area of the border of the area where the tideway is unsettled and the tide caused by the monsoon, the yellowfin tuna and the albacore give higher hooked-rates at about 150 nautical miles and at anout 100 nautical miles from the tide-border, respectively. / 1.スマトラ海域夏期の季節風流と流向不定海域との潮境の一部は94°E,4°S付近に存する.但し季節風流の勢力によりかなりの変動があるものと思われる. 2.100m層の水温で20°~23℃において釣獲率は高く,23℃以上では激減する. 3.潮境で等温線の垂直分布が急激な海域では釣獲率は低く,潮境より離れた比較的平行な海域が釣獲率が高い. 4.流向不定海域と季節風海流との潮境の南側海域の潮境付近では,潮境より150浬付近で黄肌の釣獲率高く,100浬付近で袖長の釣獲率は高い.
URI: http://hdl.handle.net/10069/31538
ISSN: 05471427
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:第19号

Citable URI : http://hdl.handle.net/10069/31538

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