"Mother bears now use humans as shields to protect their cub" Topic
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|Tango01||27 Jun 2016 10:55 a.m. PST|
"That humans pervade just about every ecosystem on Earth is no surprise anymore, but how some animals adapt to our presence can be truly astonishing. A new study, for instance, shows that mama bears are now living very close to human settlements during the mating season to protect their cubs from male bears, effectively using the human communities as shields.
Sam Steyaert of the Norwegian University of Life Sciences and colleagues tracked 26 brown bear mothers with GPS between 2005 and 2012 as these raised cubs in the Swedish forest. These mothers are some of the most stressed in the world, constantly having to look over their shoulders for males who want to kill the cubs and mate with the females.
A male in the fury of the mating season can trigger oestrus (sexual receptivity) by killing a mother's cubs. In a matter of days after killing the cubs, the male can mate with the female instead of waiting up to two years — the time it takes for a mother to rear her cubs to independence…"