Although there are only two confirmed polar bear X grizzly hybrids (see recent posts here and here) – one in 2006 and a 2nd generation back cross in 2010 – there have been a few other unconfirmed sightings and/or hunters reports in addition to the Arviat animal shot last week, but how many?
In a CBC radio interview today (27 May 2016), polar bear biologist Andrew Derocher claimed there have now been 9 polar bear/grizzly hybrids reported in Canada (with the Arviat animal shot last week being the 9th).
I think I’ve tracked down the details on those six unconfirmed Canadian sightings, plus another from Alaska. But as you will see, some of the reports are so vague it’s hard to know whether these are the animals Derocher counts as hybrids or not.
Posted in Conservation Status, Hybridization, Sea ice habitat
Tagged Alaska, Canada, Derocher, grizzly, grolar, hybrid, pizzly, polar bear, sightings
Demographic and traditional knowledge perspectives on the current status of Canadian polar bear subpopulations. 2016 (in press). Jordan York, Martha Dowsley, Adam Cornwell, Miroslaw Kuc and Mitchell Taylor. Ecology and Evolution. DOI: 10.1002/ece3.2030
Take home quote:
“We see reason for concern, but find no reliable evidence to support the contention that polar bears are currently experiencing a climate crisis. We suggest that the qualitative projections for dramatic reductions in population numbers and range are overly pessimistic given the response of polar bears, climate, and sea ice to the present.”
Posted in Conservation Status, Population, Sea ice habitat
Tagged Canada, climate change, facts, Mitch Taylor, polar bear, population status, predictions, projections, sea ice
My request to Environment Canada in early December 2014 for the documents supporting their polar bear status maps has finally generated results.
In an email dated 2 March 2015, I received the document produced by the EC Polar Bear Technical Committee (PBTC). I waited to see if it would be appended to the webpage where the maps were posted last year (reported here and here). However, as of today, that has not happened, so I am posting it here. There are some rather striking differences that may surprise you.
UPDATE 22 March 2015: A copy of the letter from the Director General of the Canadian Wildlife Service that accompanied the document below, which I forgot to include, is here. It states that the once a new status table has been compiled (provided below), “it is reviewed by the Polar Bear Administrative Committee and then becomes a public document.” The implication is that the reviewed document has not yet been produced.
Posted in Conservation Status, Population
Tagged baffin bay, Canada, declining population, Environment Canada, IUCN Polar Bear Specialist Group, Northern Beaufort Sea, PBTC, polar bear, Polar Bear Technical Committee, population estimates, sea ice, Southern Beaufort Sea, USGS
Earlier this year we had polar bear penis bones supposedly breaking due to environmental toxins; this week we have their brains damaged.
The March 15 ScienceNordic story (“Chemical pollution is causing brain damage in polar bears”) came complete with a photo of a bear (copied below, provided by research co-author Rune Dietz) that is presumably meant to convey what a “brain damaged” polar bear might look like — if not, perhaps another photo would have been a better choice?
Except, the research only showed there theoretically might be damage but the researchers didn’t bother looking for it before shouting out their findings. All about the scary message, these folks: the very large uncertainties and speculation in their research be damned.
Posted in Advocacy, Pollution, Sea ice habitat
Tagged brain damage, Canada, chemicals, climate change, Derocher, environmental contaminants, global warming, Hamilton, last refuge, media hype, Pederson, polar bear, predictions, sea ice decline, Sonne, threatened, toxins, worst-case scenario
An editorial in the Edmonton Journal this morning (“Stand on guard for polar bears”) takes a most extraordinary position: that the results of two recent papers of dubious value should motivate Canada to create more jobs for polar bear biologists, “protect” the Canadian Arctic Archipelago (from what, they don’t say), and galvanize Canada’s position with respect to curtailing carbon dioxide emissions. In that order.
Edmonton Journal editorial photo 22 January 2015. Munich Zoo bears.
First, the unnamed editors1 say: “This country needs more eyes and ears monitoring the health, numbers and locations of its polar bear populations.”
Why would they come to that conclusion? They quote University of Alberta’s Andrew Derocher (who supervises a number of students doing polar bear research in Western Hudson Bay):
“If Canada was doing the right thing, we’d have extensive monitoring,” University of Alberta polar bear researcher Andrew Derocher said to the Journal in late 2014.”
Posted in Advocacy, Conservation Status, Sea ice habitat
Tagged advocacy, Canada, climate change, Derocher, ESA, future threats, global warming, Hamilton, Hawkins, IPCC AR5, jobs, journalists, last refuge, Peacock, polar bear, population assessments, predictions, sea ice decline, threatened, worst-case scenario
According to maps dated June 2014, Environment Canada (EC) has changed the trend status of several Canadian subpopulations — without any announcement or publicly-available documents explaining the basis of the changes.
Figure 1. Environment Canada’s “Map 4: Series of Circumpolar Polar Bear Subpopulation and Status Trend Maps 2010, 2013 & 2014.” Original here.
And would it surprise you to learn that virtually all of these status changes reveal more good news about polar bears?
Posted in Conservation Status, Population
Tagged Canada, conservation status, Davis Strait, Environment Canada, good news, IUCN Polar Bear Specialist Group, Nick Lunn, PBSG, polar bear, Polar Bear Technical Committee, population estimate, Southern Beaufort, trends, western hudson bay
The Center for Biological Diversity has failed in its bid to use NAFTA (North American Free Trade Agreement) to pressure Canada to list polar bears as a species ‘threatened’ with extinction — wrapping up a story I wrote about twice last year (here and here).