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首页> 外文期刊>Estuarine Coastal and Shelf Science >Differential use of the Argentine shelf by wintering adults and juveniles southern giant petrels, Macronectes giganteus, from Patagonia
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Differential use of the Argentine shelf by wintering adults and juveniles southern giant petrels, Macronectes giganteus, from Patagonia

机译：越冬的成年人和来自巴塔哥尼亚的少年南部巨型海燕Macronectes giganteus对阿根廷货架的使用不同

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摘要

To study habitat use and at-sea movements of southern giant petrels (SGP) during non-breeding period, we deployed 15 satellite transmitters (six adults, nine juveniles) at Isla Arce and Isla Gran Robredo colonies in Patagonia, Argentina. Birds were instrumented during 81.4 ± 37 days. Adult birds used 74% of the Argentine shelf concentrating mainly at the shelf break, middle shelf waters, and the surroundings of the colony. After fledging, juveniles spread to the Argentine, Uruguayan and Brazilian shelves within the South Atlantic. Adults alternated at-sea excursions (12 ± 5 days) with periods at the colony of 3 ± 0.3 days. Contrarily, juveniles moved first to the shelf break and then traveled northwards reaching the south of Brazil. There was some spatial overlap between age classes, but only during the first 30 days after juveniles had fledged; thereafter there was not overlap between the areas used by both age classes. The Argentine shelf is widely used by different species offering a suitable environment for foraging; this may be why adults SGP from Patagonian colonies spend all year-round within the Argentine shelf. The identification of used areas of non-breeding SGP fills a gap in the species knowledge contributing not only to the preservation the species, but also to the management of marine areas globally recognized as important for many other Procellariiformes.
机译：为了研究非繁殖期南部巨型海燕（SGP）的栖息地利用和海上运动，我们在阿根廷巴塔哥尼亚的Isla Arce和Isla Gran Robredo殖民地部署了15个卫星发射器（六个成年人，九个少年）。在81.4±37天内对鸟类进行检测。成年鸟类使用了74％的阿根廷架子，主要集中在架子休息，架子中间水域和殖民地周围。出逃后，少年传播到南大西洋的阿根廷，乌拉圭和巴西的货架。成年人轮流出海旅行（12±5天），在殖民地的时间为3±0.3天。相反，少年首先移至架子断裂处，然后向北移动至巴西南部。年龄段之间存在一定的空间重叠，但仅在少年出逃后的前30天内；此后，两个年龄段使用的区域之间没有重叠。阿根廷货架被不同物种广泛使用，为觅食提供了合适的环境。这也许就是为什么来自巴塔哥尼亚殖民地的成年SGP在阿根廷货架上全年待命的原因。对非繁殖SGP使用区域的鉴定填补了物种知识方面的空白，这不仅有助于物种的保护，而且有助于全球公认对许多其他Procellariiformes重要的海洋区域的管理。

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