Svalbard Polar Bears Are Getting Fatter (for Now), Study Finds

A recent study found that polar bears in Norway's Svalbard archipelago have surprisingly gained weight over the past 27 years, despite declining sea ice in the Barents Sea. Researchers compared the body condition of the bears with the rate of sea ice melt and discovered the bears were getting fatter as ice receded. The Svalbard polar bear population has remained stable, with some bears adapting by eating reindeer, walruses, and bird eggs, or hunting denser congregations of ringed seals. However, scientists caution that this trend may be temporary, as the Arctic is warming rapidly and sea ice in the region is declining faster than in other polar bear habitats. Researchers believe there will be a point where the bears will start losing weight and face survival challenges.

A study of polar bears in Svalbard, a Norwegian archipelago, revealed that they have become fatter and healthier between 1992 and 2019, despite a significant decline in sea ice due to climate change. Researchers from the Norwegian Polar Institute weighed and measured 770 adult bears, finding a significant increase in their body fat. This unexpected outcome is attributed to the bears adapting to ice loss by hunting more land-based prey, such as reindeer and a growing population of walruses, which have been protected in Norway since the 1950s. While increased ice-free days have negatively impacted cub survival, the adult bears have seemingly benefited from new food sources and potentially more efficient seal hunting due to concentrated populations. However, researchers caution that this positive trend is unlikely to continue as sea ice continues to diminish, forcing bears to travel farther for food.