New paper: U of A put collars on subadult SB polar bear males since 2007


Even though it is well known that subadult male polar bears (≤ 4 years old) continue to grow in mass and bulk as they mature – so that their thick necks get even larger – in recent years Andrew Derocher and his students at the University of Alberta potentially endangered the lives of many subadult males in the Southern Beaufort in the process of learning relatively little they didn’t already know.

polar-bear-radio-collar_CBC Oct 28 2015

Money quote from a just-accepted paper by Master’s student Jody Pongracz and supervisor Derocher (“Summer refugia of polar bears (Ursus maritimus) in the southern Beaufort Sea”Polar Biology, in press 2016):

“The number of bears tracked varied over time due to collar design, deployment, and both planned and unplanned collar retention.”

So, how much “unplanned collar retention” issues [collars that did not fall off as expected] went on during this 2007-2010 study? They don’t…

View original post 1,064 more words


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