The migratory behaviour of narwhals (Monodon monoceros)
The migratory behaviour of narwhals (Monodon monoceros)
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DOI：
10.1139/z03-117
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发表时间：
2003-08-01
期刊：
影响因子：
--
通讯作者：
Schmidt, HC
中科院分区：
文献类型：
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作者：
Heide-Jorgensen, MP;Dietz, R;Schmidt, HC
2000年和2001年，研究者用卫星跟踪了16头雌性独角鲸（Monodon monoceros），它们从加拿大北极高地萨默塞特岛附近的夏季栖息地一直到巴芬湾中部的越冬地。越冬地的位置与巴芬湾南部的另一个独角鲸越冬地在空间上是离散的。夏季地表面积约9464 km(2)，越冬地表面积约25 846 km(2)。其中两只独角鲸被连续追踪了12个月以上。这些鲸鱼在春季和秋季迁徙期间使用了三个重点区域：8月份加拿大高纬度北极开放水域的沿海地区，11月至4月巴芬湾巩固浮冰的越冬地区，以及兰开斯特海峡快速消退的冰边缘前的初夏地区。这些鲸鱼对夏季的栖息地表现出了惊人的忠诚，它们有特定的迁徙路线，跟随海冰的形成和消退。
Sixteen female narwhals (Monodon monoceros) were tracked by satellite in 2000 and 2001 from their summering ground near Somerset Island in the Canadian High Arctic to their wintering ground in central Baffin Bay. The wintering ground location was spatially discrete from another narwhal wintering ground in southern Baffin Bay. Area extent of the summering ground was approximately 9464 km(2) and area extent of the wintering ground was 25 846 km(2). Two of the narwhals were tracked for more than 12 consecutive months. These whales used three focal areas between their spring and autumn migration: a coastal area in the open-water season in August in the Canadian High Arctic, a wintering area from November through April in the consolidated pack ice of Baffin Bay, and an early summer area in front of the receding fast ice edge in Lancaster Sound. The whales showed remarkable site fidelity to summering grounds and had specific migratory routes that followed sea ice formation and recession.