It's been claimed that this meme is a scholarly source & has been peer-reviewed.  Who exactly reviewed this authoritative research meme?

That would be "no one."

The link listed in the meme is to a personal blog, not a professional journal.

A blog which is the only place any of the material is published.

Because it can't pass peer review.

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@JOHN - Yes, essentially every time the clown posts it, he claims it's "peer-reviewed."

@Let's Head Out - Though the screen shot in the question says "seven months ago," it gets posted frequently.  Some times multiple times a day.

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@Nottingham - No, she is not a "polar bear specialist."  She claims to be a polar bear enthusiast.  But she has no academic credentials denoting expertise in them, nor has she ever done any independent research on them herself.

Leafing through the published papers of others who have actually done so, then claiming those papers say something the authors themselves deny, is neither "scholarly" nor "authoritative."

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@anonymous - Her dissertation was titled "Animal Domestication and Vertebrate Speciation: A Paradigm for the Origin of Species".  

It had nothing to do with "Polar bear thyroid and digestion."

The paper she wrote on that topic was something she wrote in grad school and wasn't remotely a "dissertation."

Let's see, who should I believe?  A PhD zoologist who has studied bears 35 years?  Or armchair alarmists?

Not sure I understand your question.  I went to that site.  Crockford, is indeed a polar bear specialist.  She discusses numbers from aerial photography and peer review. 

Peer review is a process where your colleagues judge your work and approve the methods, quality, etc.

"Authoritative" means someone in the know and/or with industry or occupational credentials.

As far as I can tell, peer review (and authority) show those numbers to be accurate.

If he had peer-reviewed evidence, he would have shown it rather than his meme.  He did not so he uses an appeal to authority, although I have no idea why writing a dissertation on the thyroid would make you an expert on population.

"It's been claimed..."

No it hasn't.

No one ever claims a marketing piece is peer reviewed.  Except your straw man.

I just looked her up.  She has a PhD in zoological science.  She did her dissertation on polar bear thyroid and digestion.  Besides being anonymous, what are your credentials?

There's an interesting Q&A on Quora about Dr. Susan Crockford.

https://www.quora.com/Why-was-zoologist-Susan-Croc...

If you can't look up the website that is posted right in that meme, then I doubt you'll understand that a zoology doctorate is a scholar.

That meme was reviewed and approved by the deluded joker troll.