Polar bear epigenetic clock

Polar bear epigenetic clock predicts chronological age in U. maritimus (r = 0.97; median absolute error approximately 9 months).

“The final polar bear clock was highly accurate (r = 0.97) with a median absolute error of approximately 9 months.”

Animalsknown-age polar bears from the Chukchi Sea and southern Beaufort Sea subpopulationswhole bloodn = 109

Estimating Polar Bear (Ursus maritimus) Age Based on an Epigenetic DNA Methylation Clock

Ecology and evolution·28 Jul 2025