Mapping Arctic cetaceans from space: A case study for beluga and narwhal.

Mapping Arctic cetaceans from space: A case study for beluga and narwhal.
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DOI:
10.1371/journal.pone.0254380
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发表时间:
2021
期刊:
影响因子:
3.7
通讯作者:
Watt CA
Watt CA
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Charry B;Tissier E;Iacozza J;Marcoux M;Watt CA

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遥感新技术的出现为科学家提供了一种检测和监测野生动物种群的新方法。在这项研究中,我们评估了使用极高分辨率(VHR)卫星图像对两种标志性北极鲸目动物--独角鲸(Monodon Monoceros)和白鲸(Delphinapterus Leucas)--进行探测和分类的能力。我们分析了2017年8月和2019年8月由WorldView-3卫星收集的12张VHR图像,该卫星的最大分辨率为每像素0.31m。这些图像覆盖了加拿大巴芬岛东部的清水湾(138.8平方公里)和特伦布莱海湾(127.0平方公里),前者是加拿大巴芬岛东部的一个地区,夏季的大部分时间都是在那里度过的,后者是位于巴芬岛北岸的一个狭窄的水体,在公开水域季节,独角鲸使用它。在这些图像中,总共检测到292头白鲸和109头独角鲸。这项研究有助于我们了解北极鲸目动物的分布,并突出了利用卫星图像探测海洋哺乳动物的能力。
Emergence of new technologies in remote sensing give scientists a new way to detect and monitor wildlife populations. In this study we assess the ability to detect and classify two emblematic Arctic cetaceans, the narwhal (Monodon monoceros) and beluga whale (Delphinapterus leucas), using very high-resolution (VHR) satellite imagery. We analyzed 12 VHR images acquired in August 2017 and 2019, collected by the WorldView-3 satellite, which has a maximum resolution of 0.31 m per pixel. The images covered Clearwater Fiord (138.8 km2), an area on eastern Baffin Island, Canada where belugas spend a large part of the summer, and Tremblay Sound (127.0 km2), a narrow water body located on the north shore of Baffin Island that is used by narwhals during the open water season. A total of 292 beluga whales and 109 narwhals were detected in the images. This study contributes to our understanding of Arctic cetacean distribution and highlights the capabilities of using satellite imagery to detect marine mammals.
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