Effectiveness of nest site restoration for the endangered northern map turtle. Report no. 1 : nest site selection and nest success from 2013-2014 and establishment of environmental center.
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Effectiveness of nest site restoration for the endangered northern map turtle. Report no. 1 : nest site selection and nest success from 2013-2014 and establishment of environmental center.

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    • Abstract:
      The Northern Map Turtle, Graptemys geographica, is a Maryland state Endangered Species, found only in the

      lower Susquehanna River in Maryland. The only area where nests of this species are not heavily impacted by

      predators occurs in the town of Port Deposit. However, turtles in Port Deposit must often cross a gravel parking lot

      with constant vehicular traffic to reach the nesting sites, and turtles may become disoriented by human disturbance

      and move away from the river, towards the roadway, Maryland Route 222. In addition, the soil in which the turtles

      are nesting is heavily compacted and turtles often abandon nest sites after unsuccessful nesting attempts. The

      objectives of this project were to (a) to rehabilitate the existing nesting areas in Port Deposit to enhance nesting

      success, (b) find ways to avoid disturbance by humans during nesting, and (c) work with town officials in

      establishing an environmental education center about the Susquehanna River and the Northern Map Turtle.

      Data from 2013-2014 showed that nesting in Port Deposit occurred from late May to late July. Numbers of nests

      varied from 7-8 per year and no nests were attacked by predators. Most nests were found adjacent to the Tomes

      Landing Marina, but a few were found upstream near condominiums. Distance from water ranged from 1-60

      meters and no differences were found between years. Hatching of this species generally overwinter in the nest,

      with emergence in April and May of the following year. TU staff worked with officials from SHA and Port

      Deposit to design the interpretive signs for the education center and the text of these signs is largely complete.

      Installation will occur in 2015 as part of Phase II of this project. Rehabilitation of the nesting areas has also been

      designed and installation will occur in 2015 as part of Phase II of this project.

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