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首页> 外文期刊>ICES Journal of Marine Science >Movements and dive behaviour of a toothfish-depredating killer and sperm whale
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Movements and dive behaviour of a toothfish-depredating killer and sperm whale

机译：贬低牙鱼的杀手和抹香鲸的活动和潜水行为

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摘要

Depredation of demersal longlines by killer and sperm whales is a widespread behaviour that impacts fisheries and whale populations. To better understand how depredating whales behave in response to fishing activity, we deployed satellite-linked location and dive-profile tags on a sperm and killer whale that were depredating Patagonian toothfish from commercial longlines off South Georgia. The sperm and killer whale followed one fishing vessel for 180km and 300km and repeatedly depredated when longlines were being retrieved over periods of 6 and 7d, respectively. Their behaviours were also sometimes correlated with the depths and locations of deployed gear. They both dove significantly deeper and faster when depredating compared with when foraging naturally. The killer whale dove 750m on five occasions while depredating (maximum: 1087m), but these deep dives were always followed by long periods (3.9-4.6h) of shallow (100m) diving. We hypothesize that energetically and physiologically costly dive behaviour while depredating is driven by intra- and inter-specific competition due to the limited availability of this abundant resource.
机译：虎鲸和抹香对延绳钓的延误是一种广泛的行为，影响到渔业和鲸鱼种群。为了更好地了解捕食鲸如何响应捕捞活动，我们在抹香鲸和虎鲸上部署了与卫星相关的位置和俯冲剖面标签，这些标记使巴塔哥尼亚牙鱼从乔治亚州南部的商业延绳钓中被捕杀。抹香鲸和虎鲸跟随一艘渔船航行超过180公里和> 300公里，并分别在6天和7天的时间里找回延绳钓时反复遭到弃用。他们的行为有时也与展开装备的深度和位置有关。与自然觅食相比，它们在掠食时确实做得更深，更快。虎鲸在弃绝时会五次跳水> 750m（最大：1087m），但是在这些深潜之后总是进行长时间（3.9-4.6h）的浅潜（<100m）。我们假设，由于丰富的资源有限，种间竞争和种间竞争推动了能源消耗和生理上昂贵的潜水行为。

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