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Bycatch of marine mammals in US and global fisheries

机译：美国和全球渔业中海洋哺乳动物的兼捕

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Fisheries bycatch poses a significant threat to many populations of marine mammals, but there are few published estimates of the magnitude of these catches. We estimated marine mammal bycatch in US. fisheries from 1990 to 1999 with data taken from the stock assessment reports required by the US. Marine Mammal Protection Act. The mean annual bycatch of marine mammals during this period was 6215 448 (SE). Bycatch of cetaceans and pinnipeds occurred in similar numbers. Most cetacean (84%) and plumped (98%) bycatch occurred in gill-net fisheries. Marine mammal bycatch declined significantly over the decade, primarily because of a reduction in the bycatch of cetaceans. Total marine mammal bycatch was significantly lower after the implementation of take reduction measures in the latter half of the decade. We derived a crude first estimate of marine mammal bycatch in the world's fisheries by expanding US. bycatch with data on fleet composition from the Food and Agriculture Organization. The global bycatch of marine mammals is in the hundreds of thousands. Bycatch is likely to have significant demographic effects on many populations of marine mammals. Better data are urgently needed to fully understand the impact of these interactions.
机译：渔业副渔获物对许多海洋哺乳动物种群构成了重大威胁，但是很少公开发表有关这些渔获量的估计数。我们估计了美国的海洋哺乳动物兼捕。 1990年至1999年的渔业，数据取自美国要求的种群评估报告。海洋哺乳动物保护法。在此期间，海洋哺乳动物的平均年捕获量为6215 448（SE）。鲸类和pin科鱼类的兼捕数量相似。大部分鲸类（84％）和丰满（98％）的兼捕物发生在g网渔业中。十年来，海洋哺乳动物的兼捕物显着下降，这主要是由于鲸类的兼捕物减少了。在这十年的后半期实施减少措施后，海洋哺乳动物的兼捕总量显着降低。通过扩大美国范围，我们得出了世界渔业中海洋哺乳动物兼捕的初步粗略估算。兼并了粮食及农业组织的船队组成数据。海洋哺乳动物的全球副渔获物成千上万。兼捕可能对许多海洋哺乳动物种群产生重大的人口统计学影响。迫切需要更好的数据来充分了解这些交互的影响。

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