🐻❄️ 'In half the area that polar bears reside in, we know nothing.' Claims that their population are growing in spite of global warming is based on incomplete data and guesswork
of the Norwegian Polar Institute told AFP the 1965 and 1981 estimates are not valid due to limitations in tracking polarThe 1965 figures come from a paragraph in a scientific meeting report and are based on three estimates. Two are extrapolations of bear counts in Alaska in 1959 and Canada in 1964; the other is a 1961 global range estimate from a Soviet scientist."This is guesswork, pure and simple. You can't trust these at all," Vongraven said.
The data from that year's report are likewise unreliable for creating a global graph, Vongraven said. The figures are based on estimates from 17 zones dating back"These surveys are on really random bits of area because at that time we didn't know the populations , so these are approximations, guesstimates, guesswork ... really coarse methods," Vongraven said."You just can't use these. There's very little data behind them.
Graphic on the polar bear, showing subpopulations and trends over the last generation, population estimates up to 2100 and comparisons with other bear species "If you plot estimated global population over time, it may look like a rising curve. This plotting of estimated numbers over time however reflects improved estimates rather than growth in numbers."More recent data for certain areas are more detailed, but still not enough to give a precise global picture.
Looking back over two or more generations, there was insufficient data for 16 of the 19 subpopulations that make up the headcount.for the global polar bear population is 26,000 -- an average from a range of 22,000 to 31,000.A female polar bear and her cub look for food on the shoreline of the Hudson Bay near Churchill, Canada on August 5, 2022
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