Polar Bear Populations


	Polar Bear Populations

Rustee

5-8-2008 12:47 AM

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Rustee says:

Given these uncertainties, the best estimate--guesstimate might be a better term--published by the International Union for Conservation of Nature (IUCN) Species Survival Commission's (SSC) Polar Bear Specialist Group, is that there are about twenty thousand to twenty-five thousand polar bears worldwide.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/9db0efc8-97a9-4c5b-95ab-e2f1f6c3b7d5/70922263-3367-42BE-8A71-B4E8526A6308/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.aei.org/publications/pubID.27918/pub_detail.asp" href="http://www.aei.org/publications/pubID.27918/pub_detail.asp" style="font-size: 11px;">www.aei.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.aei.org/publications/pubID.27918/pub_detail.asp"> "Extraordinary claims require extraordinary evidence." </blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.aei.org/publications/pubID.27918/pub_detail.asp">First, what do we know about the health of polar bear populations?</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.aei.org/publications/pubID.27918/pub_detail.asp"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/www.aei.org/img/20DDC12B-D423-4A15-B002-4FC37EED2F4B" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.aei.org/publications/pubID.27918/pub_detail.asp">Note that it encompasses virtually the entire Arctic region.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.aei.org/publications/pubID.27918/pub_detail.asp"> the Arctic is such a hostile environment that one can conduct polar bear surveys only at certain times of year and in areas close to land masses. Survey results, therefore, may or may not be representative of the population as a whole. This makes establishing the health of existing polar bear populations--the very beginning of our inquiry--difficult.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.aei.org/publications/pubID.27918/pub_detail.asp">Polar bears are counted by periodic flyovers of suspected polar bear habitat or by capturing and marking a subpopulation of bears, then using the frequency of recapture as a means to estimate the size of a population. Few subpopulations have been surveyed repeatedly, and the surveys that exist were taken over different years, some dating back to the 1980s. Where even these limited data are unavailable, population estimates are created basically from hearsay</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/70922263-3367-42BE-8A71-B4E8526A6308/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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