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When bears steal human food, mom's not to blame
Date:5/7/2008

Researchers from the Wildlife Conservation Society (WCS) found that the black bears that become habituated to human food and garbage may not be learning these behaviors exclusively from their mothers, as widely assumed. Bears that steal human food sources are just as likely to form these habits on their own or pick them up from unrelated, bad influence bears.

The study, which examines the role of genetic relatedness in black bear behavior that leads to conflict with humans, appears in the latest edition of the Journal of Mammalogy.

Understanding how bears acquire behavior is important in conservation biology and devising strategies to minimize potential human-wildlife conflicts, says Dr. Jon Beckmann, a co-author of the study. According to our findings, bears that feed on human food and garbage are not always learning these habits from their mothers.

Distributed across much of North America, black bearswhich average around 300 pounds in weightbecome a problematic species for wildlife managers when they become accustomed to human sources of food, and the habit is a hard one to break. Bears that develop these tendencies often remain problem bears for human communities, leading to property damage, injuries to people, not to mention costly relocation and sometimes death for bears.

Working in both the Lake Tahoe Basin on the California-Nevada border and Californias Yosemite National Park (where bears breaking into visitors cars has become commonplace), the researchers examined genetic and behavioral data for 116 black bears. The bears were classified as either food-conditioned (or hooked on human food) or non-food-conditioned (those bears that forage on natural food sources). The study also focused on nine mother-offspring pairs to test the assumption that mother bears teach their cubs to invade garbage bins or homes.

The verdict: Researchers found little evidence linking food-conditioned behavior with related li
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Contact: John Delaney
jdelaney@wcs.org
718-220-3275
Wildlife Conservation Society
Source:Eurekalert  

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