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FaceBook Censors Polar Bear Video For Including Factual Info

by Susan J. Crockford, Ph.D.
May 19, 2020, 7:46 AM
in News and Opinion, Videos
Reading Time: 7 mins read
A A
5

polar bear family whale bonesFacebook has labeled a recent short PragerU polar bear video as “false information” based on a ClimateFeedback review featuring statements by Andrew Derocher and Ian Stirling published 18 May 2020.

The video, posted on Facebook 5 May 2020, is also available here and here.

I was approached yesterday by Nick Coltrain, a reporter for the Des Moines Register and USA Today, asking for a statement about the accuracy of the PragerU video, which cites me as a source for two of their three ‘inconvenient facts.’

My comments are below but I reminded Nick that what is going on is a classic conflict that happens all the time in science: it presents no proof that I’m wrong or that the PragerU video is ‘false information’.

Climate Feedback is not ‘fact-checking’: it is presenting its preferred side of a disputed science issue.

STATEMENT SENT TO NICK COLTRAIN:

Thanks for the opportunity to respond. I stand behind the accuracy of the video but wish they had cited my scientific paper, my fully referenced new book, The Polar Bear Catastrophe That Never Happened, and/or The State of the Polar Bear Report 2019, also fully referenced. [links provided to Crockford 2017, 2019, 2020]

I will post a full response on my blog but would like to point out the following.

Regarding the challenge of the adjective ‘thriving’ used in the video, in the review both Derocher and Stirling referred to Barents and Chukchi Sea polar bears as doing “OK”. I contend this is a gross misrepresentation of the published literature on these bears. There have been a number of papers published on Chukchi Sea bears documenting that body condition and reproduction are better now than in the 1980s and a recent paper on the body condition of female Barents Sea bears stated:

“Unexpectedly, body condition of female polar bears from the Barents Sea has increased after 2005, although sea ice has retreated by ∼50% since the late 1990s in the area, and the length of the ice-free season has increased by over 20 weeks between 1979 and 2013. These changes are also accompanied by winter sea ice retreat that is especially pronounced in the Barents Sea compared to other Arctic areas” [Lippold et al. 2019:988]

Biologically speaking, since the premise of the assumption that polar bear populations will decline with reduced summer sea ice is that bears will be in poor condition and reproducing poorly, it is logical to assume that bears with good body condition and reproducing well belong to thriving populations, regardless of the fact that the sea ice in their region is much reduced.

In addition, Stirling further stated that “…a couple [subpopulations] are doing OK, such as Foxe Basin and Davis Straight, and one seems to be increasing (M’Clintock Channel).” It is odd that Stirling fails to mention Kane Basin, shown on the status map provided as also ‘likely increasing’ (as documented in 2016 population survey report) and yet mentions M’Clintock Channel bears seem to be increasing even though the results of a long-awaited population survey, now long overdue, have not yet been made public.

The polar bear data are contradictory: contrary to predictions, several polar bear subpopulations (at least four of them) are indeed thriving despite much reduced summer sea ice. I have chosen to emphasis that good news, while Stirling and Derocher choose to emphasize the data that seem to fit their predictions. This is a classic conflict that happens all the time in science but presents no proof that I’m wrong or that the PragerU video is inherently ‘false’.

Regards,

Susan, 18 May 2020

In short, it is indeed true that ‘Polar bears are thriving even where sea ice is diminishing.’

See also my 2018 opinion piece on the National Geographic ‘starving’ polar bear video in the Financial Post here.

Climate Feedback reviewed that piece with statements by Steven Amstrup and Andrew Derocher, which I countered here, here, and here.

ADDITIONAL COMMENTS:

The review states: “There is no scientific evidence that the entire polar bear population has been growing, contrary to what this video claims.”

In 2007 the global estimate used by the USGS in their analysis supporting the listing of polar bears as ‘threatened’ under the ESA was 24,500 (Amstrup et al. 2007) and the official IUCN estimate in 2015 (without the addition of several subpopulation estimates completed since then) was 26,000 (22,000-31,000)(Regehr et al. 2016; Wiig et al. 2015).

Do the math: 24,500 bears in 2007 vs. 26,000 bears in 2015 is an increase of 1,500 bears and indicates that overall population numbers have indeed grown by a small amount.

More recent survey results add further to that total. I’ve pointed out this may well not be a statistically significant increase but it is certainly not the decline that was predicted to occur when sea ice declined to present levels (Crockford 2017, 2019, 2020).

In addition to the thriving condition of Barents Sea bears discussed above (Aars 2018; Aars et al. 2017; Lippold et al. 2019), Chukchi Sea polar bears are also doing much better than they were in the 1980s despite much-reduced summer sea ice.

These results are documented in a number of peer-reviewed papers on the topic (ACSWG 2018; Regehr et al. 2018; Rode and Regehr 2010; Rode et al. 2013, 2014, 2018).

Ringed and bearded seals are similarly thriving despite less summer ice (Crawford et al. 2015).

Despite these results, Stirling and colleagues conclude illogically that both Barents Sea and Chukchi Sea polar bear populations are merely “likely stable” (i.e. “OK”) rather than increasing.

It is biologically implausible that both populations are merely holding their own: the Svalbard portion of the Barents Sea population increased by 42% between 2004 and 2015.

However, this was dismissed as “statistically insignificant” even though the similarly “statistically insignificant” 17% decline in Southern Hudson Bay bears in 2018 was deemed valid and represented a ‘real’ decline – such games do not instill confidence that these researchers are presenting unbiased scientific results (Crockford 2019, 2020).

Stirling states in the review: “…a couple [subpopulations] are doing OK, such as Foxe Basin and Davis Straight, and one seems to be increasing (M’Clintock Channel).”

As I mentioned above, he fails to mention the ‘increasing’ status of Kane Basin but his mention of M’Clintock Channel means we now we know why the report on the latest M’Clintock Channel population survey has not yet been released (see Crockford 2020): it obviously shows the population size has increased. More games.

I have previously addressed in detail the problems involved in the Southern Beaufort population estimate and those for Western and Southern Hudson Bay which are at odds with the picture presented by ClimateFeedback. See Crockford 2017, 2019, 2020.

ERRORS IN THE REVIEW:

1) “The global polar bear population is currently estimated to be approximately 20,000 – 25,000 bears, distributed among 19 subpopulations.” This is wrong: it’s an out-of-date estimate used in a paper co-authored by reviewer Derocher in 2013. The official global population estimate used by the IUCN (2015) and the IUCN Polar Bear Specialist Group (2018) is 22,000-31,000 (or 26,000 on average), see Regehr et al. 2016 and Wiig et al. 2015.

2) Reference 1 in the citation list: “Stirling et al. (2018)” should be Stirling et al. (2012)

3) Paragraph 3 of the review: “But as stated in Hunter et al. (2015)” should be Hunter et al. (2010).

SOME RELATED POSTS, WITH REFERENCES:

Now 20 years with no trend in ice breakup dates for Western Hudson Bay polar bears [discusses the Lunn et al. 2016 paper cited in the Climate Feedback review]

Southern Beaufort polar bear ‘decline’ and reduced cub survival touted in 2008 was invalid, PBSG now admits

Great polar bear red herring in the Southern Beaufort
[discussed the repeated starvation events that resulted from thick spring ice conditions unique to the Southern Beaufort, which are now falsely blamed on lack of summer ice]

Global polar bear population larger than previously thought – almost 30,000 [discusses the polar bear subpopulation estimates that were not included in the 2015 IUCN Red List assessment because they had not yet been published]

Even with Inuit lives at stake, polar bear specialists make unsupported claims [discusses Ian Stirling’s oft-repeated claim that the body condition of polar bears in Western Hudson Bay has dropped and that cub survival rates have “plummetted” – even though data supporting these claims have not been published – as I pointed out in my 2019 State of the Polar Bear Report (Crockford 2020)]

The Chukchi Sea polar bears number almost 3000 according to new survey results update [reports the 2016 population estimate that replaces the old ‘guess’ of 2,000 bears used in the 2015 IUCN Red List assessment]

Polar bear specialists double-down on a message of future starving bears [discusses the claim that Southern Beaufort Sea polar bears are starving due to declining summer sea ice]

Global polar bear abundance ‘best guess’ estimate is 39,000 (26,000-58,000) [discusses polar bear numbers in 2018 and why I think they are too low, see quote below].

“In 2014, the chairman of the IUCN Polar Bear Specialist Group (PBSG) emailed me to say that their global population size number ‘has never been an estimate of total abundance in a scientific sense, but simply a qualified guess given to satisfy public demand.’
In my new book, The Polar Bear Catastrophe That Never Happened, I contend that this situation will probably never change, so it’s time to stop holding out for a scientifically accurate global estimate and generate a reasonable and credible ‘best guess’. Recent surveys from several critical polar bear subpopulations have given us the information necessary to do this.

These new numbers make it possible to extrapolate from ‘known’ to ‘unknown’ subpopulations within so-called ‘sea ice ecoregions’ (defined in 2007 by polar bear scientists at the US Geological Survey, see Amstrup et al. 2007) as shown below, to update old estimates and generate new ones for never-studied areas.”

Dr. Susan Crockford is a zoologist (former adjunct professor, University of Victoria) specializing in Holocene mammals, including polar bears and walruses. Her new book is called The Polar Bear Catastrophe That Never Happened (Amazon).

Read rest at Polar Bear Science

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Comments 5

  1. Spurwing Plover says:
    5 years ago

    Most all liberal nature Documentries are made to get emotional like the Starving Polar Bear its al based upon Emotions not Facts

    Reply
  2. Stewart Anderson says:
    5 years ago

    Oh how I wish you could get someone to get the BBC to broadcast some of this: they are totally obsessed with presenting the opposite….

    Reply
  3. Del says:
    5 years ago

    https://www.cbc.ca/news/canada/north/emaciated-polar-bear-response-1.4788259
    https://nationalpost.com/news/canada/what-everybody-got-wrong-about-that-viral-video-of-a-starving-polar-bear

    Reply
  4. Gary Hall says:
    5 years ago

    Greta Thunberg, said in an early interview that it was a video (or pic?) of a starving polar bear that she watched in school that activated her.

    Fake start to a fake career- sadly.

    Reply
  5. Spurwing Plover says:
    5 years ago

    They do not wan the truth to be seen,read or heard Big Brother wont allow it

    Reply

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