Ann Arbor, Ann Arbor officials expected to make a decision on deer culling by next month July 14, 2015

Michigan Urban Deer Management News and Information Archive

... Injecting PZP pellets into deer — either by hand or using a dart gun — renders deer temporarily infertile.  Boyles Griffin said a $25 dose lasts about one year, while a $230 dose can last about two or three years...  PZP has proven to be about 90 percent effective... about 258 deer at Fripp Island and saw a dramatic decrease in the fawn rate, decreasing the population by 50 percent in five years...

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