Abstract
AbstractDeer–vehicle collisions (DVCs) are the primary source of mortality for the endangered Florida Key deer (Odocoileus virginianus clavium). Of these collisions, >50% occur on United States Highway 1 (US 1), the primary roadway connecting the islands in the Florida Keys, USA. The DVCs on the 5.6‐km section of US 1 on Big Pine Key are responsible for approximately 26% of annual Key deer mortality, but extensive urban development along this highway segment complicates efforts to reduce DVCs using traditional methods (e.g., fencing, underpasses). In 2002, a continuous 2.6‐km system of 2.4‐m fencing, 2 underpasses, and 4 experimental deer guards was completed. We evaluated the long‐term effectiveness of these highway improvements in reducing DVCs within an urban landscape. Deer used the underpasses all 7 postconstruction years (2003–2009) with dramatic increases in use over the course of the project. Roadway fencing largely eliminated deer intrusion onto the fenced area of US 1. Although well‐maintained fencing effectively restricted deer movement onto the fenced section of US 1 (73–100% decline), other sections of US 1 experienced increases in DVCs. Overall, highway improvements along the US 1 corridor were effective in reducing Key deer mortality over the long‐term. The success of deer guards in preventing deer access into the fenced section of US 1 supported the feasibility of implementing similar wildlife exclusion projects in other urban areas. © 2011 The Wildlife Society.
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