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The world’s oldest-known wild bear has died of old age in northern Minnesota at the age of 39½, according to the Minnesota Department of Natural Resources (DNR).
Known to DNR researchers as Bear No. 56, the female American black bear was first captured and radio-collared in July 1981 by DNR scientists during the first summer of a long-term research project on bear population ecology. The bear was 7 years old at the time and was accompanied by three female cubs.
Bear No. 56 became a significant animal in the DNR research project. During a 32-year study period, she and her many offspring provided an almost uninterrupted record of reproduction, survival, movements and, eventually, senescence (aging), within a single matriarchal lineage. Data from this bear and her offspring have contributed significantly to the scientific literature on black bear biology.
From 1981-1995, Bear No. 56 produced eight litters of cubs and successfully reared a remarkable 21 of the 22 cubs to 1½ years of age. In 1997, at age 23, she uncharacteristically lost two of her three cubs before weaning. In 1999, at age 25, she bore and raised her last cub. In 2001, when she was next expected to give birth, researchers found her healthy in her den and producing milk but without cubs."
More here
http://news.dnr.state.mn.us/2013/08/...ar-dies-at-39/
