Document Type

Campus-Only Access for Five (5) Years

Embargo Period

6-2-2015

Degree Program

Wildlife & Fisheries Conservation

Degree Type

Master of Science (M.S.)

Year Degree Awarded

2015

Month Degree Awarded

February

Advisor Name

Paul

Advisor Middle Initial

R

Advisor Last Name

Sievert

Co-advisor Name

Scott

Co-advisor Middle Initial

D

Co-advisor Last Name

Jackson

Third Advisor Name

Alan

Third Advisor Middle Initial

M

Third Advisor Last Name

Richmond

Fourth Advisor Name

Jonathan

Fourth Advisor Middle Initial

V

Fourth Advisor Last Name

Regosin

Abstract

Roadways are a pervasive feature of northeastern landscapes and can be a significant source of mortality for turtles. Until recently, little has been known about the design requirements for successful under-road passages for turtles and other wildlife to move safely between bisected habitat patches. At outdoor laboratories, using a factorial experimental design, we examined movements in response to varying light levels, and barrier opacity for painted turtles (Chrysemys picta, n=833), Blanding’s turtles (Emydoidea blandingii, n=49), and spotted turtles (Clemmys guttata, n=49). Additionally, we examined tunnel size, tunnel entrance design, and artificial lighting for painted turtles only. All three species responded poorly to a 0% available light treatment. As the amount of natural light transmitted through the tops of tunnels increased, successful completion of the trials increased. Furthermore, turtles generally moved at a slower rate when traveling along a translucent barrier, compared to an opaque one. Our results indicate the importance of designing road passage structures for freshwater turtles that provide adequate tunnel lighting in combination with specific entrance designs that meet the goals of the project.

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