• Dubuc, Leslie J
  University of Maine Graduate School
  

This study was conducted to define and quantify the ecological factors affecting the distribution and status of river otters (Lutra canadensis) in Acadia National Park (ANP) on Mount Desert Island (MDI), Maine. The distribution of otters was determined by searching for otter sign on all watersheds on MDI during 2 winter and 2 summer field seasons between August 1985-March 1987. Otter sign was documented on 25 of 39 watersheds during 207 sign-searches.

To maintain or improve the status of otters on MDI, the NPS should conduct periodic sign surveys to monitor population status, maintain patches of early successional vegetation along waterways, and ensure that otters have access to marine resources by establishing resource protection zones.