Nutrition and Fasting in Polar Bears (George Durner)

Video Shot in: 2009

Dr. George Durner, a research zoologist at the US Geological Survey Alaska Science Center, has extensively studied polar bears’ response to changing sea ice conditions. His team found that polar bears are fasting more due to reduced access to Ringed seals, their primary food source, leading to negative effects on their survival and reproduction. Additionally, cortisol levels in polar bear fur has indicated nutritional stress during periods of low survival. These findings underscore the challenges polar bears face in a changing Arctic environment.