The Description of Catch and Effort of the Taiwanese Albacore Longline Fishery in Atlantic Ocean

臺灣的大西洋長鰭鮪延繩釣漁業之漁獲量與努力量概況

吳繼倫(Chi-Lun Wu) ； 葉顯椏(Shean-Ya Yeh) ； 蘇偉成(Wei-Cheng Su)

《臺灣水產學會刊》 33卷1期 (2006/03) Pp. 11-23

https://doi.org/10.29822/JFST.200603.0002

摘要

本研究使用1967-2002年臺灣的大西洋長鰭鮪漁業之漁獲量與努力量資料探討臺灣大西洋鮪延繩釣漁業的時空特徵。長鰭鮪為臺灣的大西洋鮪延繩釣漁業主要標的魚種，近十年期間（1993-2002年），在大西洋南北洋區的長鰭鮪漁獲量分別為各漁業國總產量的65%及14%。80年代後期開始，部分鮪延繩釣漁船，改良冷凍設備並採用深層式漁法於熱帶海域捕捉大目鮪、黃鰭鮪及劍旗魚，使本漁業的作業型態發生顯著變化。由於大西洋鮪延繩釣的漁獲統計資料中含有這些不以長鰭鮪為主要目標魚種的深層式漁獲統計資料，因而影響了南、北長鰭鮪系群釣獲率，使其呈現顯著下降的趨勢。

關鍵字

漁獲量 ； 努力量 ； 長鰭鮪 ； 延繩釣漁業 ； 大西洋

並列摘要

The spatial and temporal characteristics of Taiwanese longline fishery in the Atlantic Ocean was examined using the catch and effort data, aggregated by month, by 5×5 degree statistical block and by species from 1967 to 2002. Taiwanese longline fishery in the Atlantic Ocean is directed mainly at albacore. In the last decade (1993-2002) the albacore average catch of Taiwan's longline fleet accounted for more than 65% in South Atlantic Ocean and for 14% in North Atlantic Ocean for all flags. After late-1980s, the deep longline operation was introduced. Some longliners improved the freezing facilities and shifted the target from temperate albacore to the tropical bigeye tuna, yellowfin tuna and swordfish more or less. The fishing strategy of Taiwanese longline fishery has been transformed since then. Moreover, while the joining of the non-albacore directed effort, ft may result of the decreasing trends of albacore's catch rate in the both North and South Atlantic Oceans since late-1980s.

並列關鍵字

Catch ； Effort ； Albacore ； Longline fisheries ； Atlantic Ocean