SummaryBetween April 2008 and July 2015, we conducted a total of 18 trips on five different side-haul trawlers fishing within the Argentine Exclusive Economic Zone, monitoring 486 hauls. We observed 100% of the hauls and monitored trawl cables for 136.7 hours, about 5% of the trawl effort, to identify the levels of seabird bycatch from net entanglements and collisions with trawl cables. A total of 35 net entanglements of White-chinned Petrels Procellaria aequinoctialis, Great Shearwaters Ardenna gravis, Black-browed Albatrosses Thalassarche melanophris and Southern Royal Albatross Diomedea epomophora were recorded, all of which occurred during the autumn and winter. Additionally, 656 seabird collisions against trawl cables were recorded including 39 heavy, 96 medium and 521 light. Further, we recorded nine Black-browed Albatrosses and two Great Shearwaters potentially dead. Although in the study fishery the number of deaths in the trawl cables could surpass the number of birds incidentally killed in nets, the mortality rate caused by the latter type of interaction far exceeds those observed in nets from other trawl fisheries operating in the Patagonian Shelf. Fortunately, 26% of the seabirds entangled in the net were recovered and released alive, which indicates that awareness and training in safe bird handling and release may improve captured seabird survival rates. The main objectives of this work is to highlight a little-studied source of seabird mortality by entanglement, to generate discussion on potential technical mitigation measures for side-haul trawl fisheries, and to propose crew training in safe handling and release of seabirds as an immediate mitigation measure.

中文翻译：

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阿根廷侧拖拖网渔船意外捕获海鸟

总结 2008 年 4 月至 2015 年 7 月期间，我们在阿根廷专属经济区内使用 5 艘不同的侧拖拖网渔船进行了 18 次航行，监测了 486 次拖网。我们观察了 100% 的拖网，并监测了拖网电缆 136.7 小时，约占拖网工作量的 5%，以确定因网缠结和与拖网电缆碰撞而造成的海鸟兼捕水平。白颏海燕共35条净缠秋分龙须菜, 大海鸥重症阿登纳, 黑眉信天翁黑海藻和南皇家信天翁荠菜记录下来，都发生在秋冬季节。此外，记录了 656 起海鸟与拖网电缆的碰撞，其中包括 39 起重型、96 起中型和 521 起轻型。此外，我们记录了九只黑眉信天翁和两只可能死亡的大海鸥。虽然在研究渔业中，拖网电缆中的死亡人数可能超过在网中意外死亡的鸟类数量，但后一种相互作用造成的死亡率远远超过在巴塔哥尼亚大陆架其他拖网渔业中观察到的死亡率。幸运的是，被网缠住的海鸟中有 26% 被回收并活着放生，这表明安全处理和释放鸟类的意识和培训可能会提高捕获的海鸟存活率。