Theses and Dissertations

Date of Award


Document Type


Degree Name

Master of Science (MS)



First Advisor

Dr. Richard Kline

Second Advisor

Dr. John Young

Third Advisor

Dr. Abdullah Rahman


To mitigate ocelot (Leopardus pardalis albescens ) road mortality, Texas Department of Transportation installed fencing, wildlife road crossing structures (WRCS, n = 5), and wildlife guards (WG, n = 18) on divided State Highway 100 in Cameron County, Texas. During construction, active infrared (AIR, n = 24) and passive infrared (PIR, n = 24) cameras were side-by-side at WRCS (n = 6) and WG (n = 6). Community composition was significantly different (p = 0.0001) between camera types with AIR cameras detecting a more diverse and abundant community. Wildlife community was significantly different (p = 0.0002) between three WRCS but not between pipe and bridge grate WG (p = 0.4427). Pipe WG had a significantly higher repel rate for bobcats (56%) and coyotes (83%) than bridge grate WG (18%, p = 0.020 and 52%, p < 0.0005 respectively). WRCS are a viable solution for the endangered ocelot in the United States.


Copyright 2018 Tiffany C. Cogan. All Rights Reserved.

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