Individual variation in movements of satellite-tracked humpback whales Megaptera novaeangliae in the eastern Aleutian Islands and Bering Sea
Individual variation in movements of satellite-tracked humpback whales Megaptera novaeangliae in the eastern Aleutian Islands and Bering Sea
复制标题
阿留申群岛东部和白令海卫星追踪座头鲸 Megaptera novaeangliae 运动的个体差异
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
P. Clapham
中科院分区：
文献类型：
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作者：
A. Kennedy;A. Zerbini;Brenda K. Rone;P. Clapham
座头鲸在夏季利用阿留申群岛和白令海的沃茨作为觅食地。目前，人们对座头鲸在这些觅食地内的精细运动知之甚少。在2007年至2011年的夏天，8座头鲸被部署在乌纳拉斯卡湾附近的卫星标签跟踪。个体被跟踪平均28天（范围= 8 - 67天）。三头鲸鱼在其标记位置的50公里范围内停留了大约14天，而另外两头鲸鱼则探索了乌纳拉斯卡湾和乌尼马克山口的北方海岸附近的区域。两条鲸鱼向西移动：其中一队前往四山岛，返回乌姆纳克岛北方，另一队则穿过乌姆纳克山口，探索乌姆纳克岛两侧的觅食区。值得注意的是，1个人离开乌纳拉斯卡湾后不久，标记和移动~1500公里（12天）沿着白令海外大陆架南部楚科奇半岛，俄罗斯，然后向东穿过白令海盆地的Navarin峡谷，在那里，它仍然直到传输停止。大多数区域限制搜索（即觅食）仅限于沃茨浅于1000米，而移动到更深的水往往与旅行行为。被标记的动物在白令海大陆架和陆坡上度过的时间比北太平洋要多。运动模式显示个体差异，但可能受季节性生产力的影响。这项研究提供的证据表明，虽然座头鲸聚集在著名的觅食区，个人可能会执行非常长的行程在喂养季节。
Humpback whales utilize waters off the Aleutian Islands and Bering Sea as foraging grounds during summer months. Currently, the fine-scale movements of humpback whales within these feeding grounds are poorly understood. In the summers of 2007 to 2011, 8 humpback whales were tracked with satellite tags deployed near Unalaska Bay. Individuals were tracked for an average of 28 d (range = 8�67 d). Three whales remained within 50 km of their tagging locations for approximately 14 d, while 2 others explored areas near the northern shore of Unalaska Bay and Unimak Pass. Two whales moved west: one traveled to the Island of Four Mountains and returned to the northern side of Umnak Island, while the other moved through Umnak Pass and explored feeding areas on both sides of Umnak Island. Remarkably, 1 individual left Unalaska Bay soon after tagging and moved ~1500 km (in 12 d) along the outer Bering Sea shelf to the southern Chukotka Peninsula, Russia, then east across the Bering Sea basin to Navarin Canyon, where it remained until transmissions ceased. Most area-restricted search (i.e. foraging) was limited to waters shallower than 1000 m, while movement into deeper water was often associated with travel behavior. Tagged animals spent more time on the Bering Sea shelf and slope than the North Pacific. Movement patterns show individual variation, but are likely influenced by seasonal pro- ductivity. This study provides evidence that although humpbacks aggregate in well-known forag- ing areas, individuals may perform remarkably long trips during the feeding season.