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Post by grrraaahhh on Sept 5, 2010 16:30:21 GMT -9
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Post by warsaw on Jun 21, 2012 5:15:38 GMT -9
"...Age-related vulnerability is a function of avail- ability, hunting pressure, and hunting method. In North Carolina, Collins (1973) found that 1- and 2- year-old males comprised the bulk of the annual har- vest. Alt (1980) in Pennsylvania indicated older bears were less vulnerable than younger ones and that year- lings were the most susceptible group. In the North Bay area, males first became vulnerable at age 2 and females at age 3. The greater vulnerability of females aged 3-6 was probably related to greater movement precipitated by sexual maturation and associated search for a mate or territory or both (Rogers 1977). Some females on the study area became sexually ma- ture at age 4 and reproduced at age 5, but most failed to reproduce until age 6 or older (Kolenosky, unpubl. data). For males, the onset of dispersal activity at age 2 (Jonkel and Cowan 1971, Rogers 1977) undoubt- edly contributed to their greater vulnerability..." THE EFFECTS OF HUNTING ON AN ONTARIO BLACK BEAR POPULATION GEORGE B. KOLENOSKY
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