There is no evidence that slightly less winter sea ice than the average since 1979 has had any negative impact on polar bear health or survival: the difference is simply not biologically meaningful to Arctic animals.
Polar bear on winter sea ice around the yearly maximum in the Beaufort Sea, 2010 (March 21).
NASA’s 23 March 2018 announcement regarding the Arctic sea ice maximum this year:
“Sea ice in the Arctic grew to its annual maximum extent last week, and joined 2015, 2016 and 2017 as the four lowest maximum extents on record, according to scientists at the NASA-supported National Snow and Ice Data Center (NSIDC) and NASA.”
Except, what they don’t tell you is that 2006 had almost the same extent as 2018 and 2006 wasn’t far behind according to the official, averaged data presented at NSIDC’s Arctic Sea Ice News & Analysis:

Current conditions at the winter…
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I am so tired of ” scientists”, usually educated by my tax dollars, selling out to corporations and political agendas. These cowards refuse to speak out about human overpopulation, and its concomitant component, overconsumption. They instead enjoy all the trappings of being ” authorities” without the requisite responsibilities that go with it.
Let’s not use self-restraint in our lifestlyes, instead we should plunder until there is no more, and then blast out into the rest of the universe to continue our selfish ways.