Andrew Derocher (@aederocher) 's Twitter Profile
Andrew Derocher

@aederocher

Professor of Biological Sciences @UAlberta. I've studied polar bears for 40 years. Author of Polar Bears: A Complete Guide to Their Biology and Behavior.

ID: 2857031384

linkhttps://jhupbooks.press.jhu.edu/title/polar-bears calendar_today15-10-2014 18:30:25

5,5K Tweet

7,7K Followers

1,1K Following

IBA/ bearbiology (@ibabearbiology) 's Twitter Profile Photo

We are thrilled to have Dr. Mark Boyce, Professor of Ecology at the University of Alberta, as our keynote speaker for the 28th IBA Conference! Join us as Dr. Boyce delves into the intersection of ecology, hunting, and politics. #IBAEdmonton2024 #UofA #YEG #EdmontonAlberta

We are thrilled to have Dr. Mark Boyce, Professor of Ecology at the University of Alberta, as our keynote speaker for the 28th IBA Conference!
Join us as Dr. Boyce delves into the intersection of ecology, hunting, and politics.
#IBAEdmonton2024 #UofA #YEG #EdmontonAlberta
Andrew Derocher (@aederocher) 's Twitter Profile Photo

Some Western Hudson Bay polar bears are still out on the sea ice. Amazing year for the bears brought on by odd winds from the east. Onshore dates will be similar to 40 years ago & should bode well for lots of fat bears. Field sampling starts in August so more news then.

Some Western Hudson Bay polar bears are still out on the sea ice. Amazing year for the bears brought on by odd winds from the east. Onshore dates will be similar to 40 years ago & should bode well for lots of fat bears. Field sampling starts in August so more news then.
Andrew Derocher (@aederocher) 's Twitter Profile Photo

While covered in the media last year, new paper reports on avian influenza in an Alaskan polar bear that died. Should we be concerned? 100%. Polar bears are consummate scavengers: dead, dying & weakened birds are part of their diet. wwwnc.cdc.gov/eid/article/30…

While covered in the media last year, new paper reports on avian influenza in an Alaskan polar bear that died. Should we be concerned? 100%. Polar bears are consummate scavengers: dead, dying & weakened birds are part of their diet.
wwwnc.cdc.gov/eid/article/30…
UAlbertaScience (@ualbertascience) 's Twitter Profile Photo

This just in from British Vogue, meet Alison Criscitiello, EAS researcher and Academic and Executive Director, Canadian Ice Core Lab, who is changing the way we see the Earth's past. bit.ly/4dBsx8o #UAlberta UAlberta Research & Innovation Canadian Ice Core Lab (CICL)

This just in from <a href="/BritishVogue/">British Vogue</a>, meet Alison Criscitiello, EAS researcher and Academic and Executive Director, Canadian Ice Core Lab, who is changing the way we see the Earth's past. 
bit.ly/4dBsx8o #UAlberta <a href="/UofAResearch/">UAlberta Research & Innovation</a> <a href="/IceCicl/">Canadian Ice Core Lab (CICL)</a>
Gordy Kidlapik ❄️E1-644 (@irngutaq2) 's Twitter Profile Photo

Yesterday Daniel Kablutsiak, a buddy and our son in law's younger brother watched a huge polar bear hunt and catch a caribou. He mentioned it happened so fast

Yesterday Daniel Kablutsiak, a buddy and our son in law's younger brother watched a huge polar bear hunt and catch a caribou. He mentioned it happened so fast
Andrew Derocher (@aederocher) 's Twitter Profile Photo

Polar bears in Rankin Inlet causing safety issues. With sea ice break-up so far north & west this year, a lot of bears may be on land in unusal places. Unlike Churchill, many communities are not as resourced to deal with human-bear conflicts. nunatsiaq.com/stories/articl…

Polar bears in Rankin Inlet causing safety issues. With sea ice break-up so far north &amp; west this year, a lot of bears may be on land in unusal places. Unlike Churchill, many communities are not as resourced to deal with human-bear conflicts.
nunatsiaq.com/stories/articl…
Andrew Derocher (@aederocher) 's Twitter Profile Photo

5th lowest ice area on record. Svalbard is not the ecosystem I studied from 1996-2002. Much of my polar bear study area is no longer habitat for the bears & the ringed seals they rely on. Lost habitat is mainly the western areas but a fair bit is gone in the Barents Sea.

Andrew Derocher (@aederocher) 's Twitter Profile Photo

Not the worst year on record for polar bears but it depends on which of 20 subpopulations a lives bear in. Some had a good 2024 but others, not so much. We're working on a new paper that shows large increased in demographic parameter variance in W. Hudson Bay: soon out to review.

Andrew Derocher (@aederocher) 's Twitter Profile Photo

For the 20 polar bear subpopulations across the Arctic, such conditions add to the climate change associated decline of sea ice. For polar bears, this is habitat loss. There are thresholds in sea ice loss under which polar bear subpopulations can't persist.

Andrew Derocher (@aederocher) 's Twitter Profile Photo

It was just a matter of time given that male grizzlies kept showing up on Vancouver Island. An establishing population of grizzlies in this ecosystem will be interesting. mycomoxvalleynow.com/101010/news/is…

It was just a matter of time given that male grizzlies kept showing up on Vancouver Island. An establishing population of grizzlies in this ecosystem will be interesting.
mycomoxvalleynow.com/101010/news/is…
Andrew Derocher (@aederocher) 's Twitter Profile Photo

Conrad Black in his National Post article says "Decades have gone by in which the polar bears were supposed to become extinct...". Nonsense. Conservation concerns about the future of polar bears arose in 1993: not extinction. "become extinct" decades ago was never an issue.

<a href="/ConradMBlack/">Conrad Black</a> in his <a href="/nationalpost/">National Post</a> article says "Decades have gone by in which the polar bears were supposed to become extinct...". Nonsense. Conservation concerns about the future of polar bears arose in 1993: not extinction.  "become extinct" decades ago was never an issue.
Andrew Derocher (@aederocher) 's Twitter Profile Photo

Low summer is isn’t a big issue for Svalbard’s polar bears as many move onto land. It’s the long term loss of sea ice that threatens them.