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IMAGE: Two wild arctic ground squirrels touch noses in the northern Brooks Range during summer.
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Credit: Photo by Rhiannan William
By feeding arctic ground squirrels special diets, researchers have found that omega-3 fatty acids, common in flax seed and fish oil, help keep the animals warmer in deep hibernation.
A University of Alaska Fairbanks-led study fed ground squirrels either a diet high in omega-3s or a normal laboratory diet, and measured how the animals hibernated afterward. Researchers found that the omega-3 diet helped the animals hibernate a little warmer than normal without negatively affecting hibernation. The omega-3 diets also increased the amount of a heat-producing fat, called brown adipose tissue, the animals pack on. ....

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