论文部分内容阅读
印度洋金枪鱼渔业自50年代初期开始,产量持续增长,到2003年,三种热带金枪鱼类(黄鳍、肥壮、鲣鱼)产量为112.3万吨。其中黄鳍金枪鱼产量为45.78万吨,占全球黄鳍金枪鱼产量(154.7万吨)的29%。按作业方式,黄鳍金枪鱼产量的42%为围网作业捕获,23%为延绳钓作业捕获,21%为流刺网作业捕获,其余由手、竿钓、饵料船等作业捕获。根据2005年资源评估,2003年黄鳍捕捞量明显过高,资源处于过度开发状态。近几年产量已接近甚至超过最大持续可捕量30-35万吨。为减少FAD对黄鳍仔鱼误捕量,建议规定最小捕捞规格和上岸率以及减少流木集群围网(FAD)数量。
The tuna fishery in the Indian Ocean has been growing continuously since the early 1950s. By 2003, the output of three tropical tuna species (yellow fins, fat, catfish) was 1.133 million tonnes. Among them, yellowfin tuna output was 457,800 tons, accounting for 29% of global yellowfin tuna production (1,547,000 tons). According to the operation mode, 42% of yellowfin tuna output was seine operation, 23% was longline operation, 21% was caught by dunnage net and the rest was captured by hand, pole fishing and bait ship operation. According to the resource assessment in 2005, the catch of yellowfin fins in 2003 was obviously too high and the resources were over-exploited. In recent years, production has approached or exceeded the maximum sustainable capture of 30-35 million tons. In order to reduce the false catch of yellowfin larvae by FAD, it is suggested that minimum fishing specifications and landed rates be provided and the number of FADs should be reduced.