Based on the investigation of Albacore Tuna longline fisheries in temperate high seas of Indian Ocean (19° 35'S - 32°01'S 58°25'E - 75°52'E) by "Zhongrong No. 6" from March to May in 2008, during this period, there were 45 operations, and a total of 27 species were identified from the catches including tunas ( 1730,58.5 % ), billfishes ( 175,5. 92% ), sharks and rays ( 187,6. 32% ) and others (865,29. 25% ). Moreover, the influencing factors about the length and weight distribution of all the catches were analyzed. Finally, the countermeasures for reducing the'by-catch species were proposed.%根据2008年3～5月“中荣6号”在印度洋温带公海(19°35′S～32°01′S,58°25′E～75°52′E)金枪鱼延绳钓渔业的调查,期间共投钩45航次,钓获27种鱼类,包括金枪鱼类(1730尾,占总渔获尾数的58.5％),剑旗鱼类(175尾,5.92％),软骨鱼类(187,6.32％)和其他鱼类(865尾,29.25％).分析了延绳钓渔获物的长度和重量组成和渔获组成的影响因素,并提出减少兼捕渔获的对策.
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