June 10, 2015
Bears in Katmai grow large, very large. For example, adult males average 700-900 pounds (272-408 kg) in mid summer! By October, well fed, large-bodied males can tip the scales above 1000 pounds (454 kg). Why do male bears grow so large? What advantages does large size confer to male bears? Competition for food and mates may provide answers.
January 22, 2014
Brown bear cubs are from 1/3 to 1/10 of that predicted for female mammals of comparable size. Why would brown bears give birth to such small and vulnerable offspring? Like many natural phenomenon, no one knows for sure but biologists have some ideas.