David L. Garshelis

A dental dilemma: bear teeth reveal a spatial gradient in age of primiparity, but temporal trends muddled when bears grew fast

Abstract Age of primiparity (AOP) in American black bears (Ursus americanus) is driven by nutrition. We estimated AOP from patterns of cementum annuli in female bear teeth (more than 16 000), which were collected from hunters in Minnesota, USA, over five decades. AOP was delayed...