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>Of the 19 polar bear subpopulations recognized in 2017, one was in decline, two were increasing, seven were stable, and nine had insufficient data.[48] https:
by raspberry1337 4y ago
>Of the 19 polar bear subpopulations recognized in 2017, one was in decline, two were increasing, seven were stable, and nine had insufficient data.[48]
https://web.archive.org/web/20151224224314/http://pbsg.npolar.no/en/status/status-table.html https://web.archive.org/web/20151224224314/http://pbsg.npola...
- londons_explore 4y agoIt seems a multispectral satellite photo would quite easily spot bears. Heat signature visible in the IR, and shadow in the visible spectrum. You could get pretty good population estimates by just reviewing random 1 km^2 samples for bears and then extrapolating.