Effect of a Drawdown on the Movement of Chrysemys picta
Kesha Evans, Towson University; Tina Walthe, Biological Sciences, Towson University
In the late 1950’s a series of impoundments were created for waterfowl research and production at the Patuxent National Wildlife Refuge (PNWR). The water levels in these impoundments are often manipulated in order to produce the ideal habitat for waterfowl. This process is called a “drawdown”. However, few studies have been done assessing the specific impact of a drawdown on different species. Our study focuses on the effects of a drawdown on 31 painted turtles using radiotelemetry. Turtles did not respond to the drawdown for approximately 33 days after water levels began to drop, but a rapid response was noted after that period.

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