E. Darrell Land

Evaluation and Use of Precast Wildlife Crossings by Florida Wildlife

We studied use of a new, less expensive design of wildlife crossing to determine the acceptance of the structure by wildlife. We documented wildlife use of 2 precast concrete wildlife crossings from 27 March 1995 to 30 June 1996 on State Road (SR) 29 in southwest Florida. Two additional crossings of a different design were monitored on Interstate (I)-75 for comparison. Over 1,000 photographs were taken of >20 species of wildlife, domestic animals, and humans using those 4 wildlife crossings. The SR 29 structures were utilized by Florida panthers (Felis concolor coryi), black bears (...


Mortality Patterns of Female White-tailed Deer in Southwest Florida

Eleven of 66 radio-collared white-tailed deer (Odocoileus virginianus) in southwest Florida were killed by bobcats (Felis rufus) and 4 by Florida panthers {Felis concolor coryi). Average doe home range size was 194 ha, and 2 bucks ranged from 454-1,560 ha. There were no differences (P = 0.336) in doe survival rates among seasons. The average annual survival rate for does was 0.813 (95% CI- 0.68, 0.94) and 64% of the annual mortality was attributable to predation. Average neonate mortality rate was 37.8% ±16.1 and appeared to increase with surface water levels. Human hunting activities had...


Mortality Patterns of Panthers in Southwest Florida

Mortality of Florida panthers (Felis concolor coryi) was examined from December 1979 through May 1991 in southwest Florida. Average annual mortality (17.2%) over a 4-year period (1987-1990) was similar to unhunted populations of mountain lions. Highway collisions caused 46.9% of documented mortality followed by natural causes (28.1%), illegal shooting (6.2%), and research activities (6.2%). Road mortality appears greater from November to January and more likely among male panthers and panthers residing adjacent to State Roads 29 and 84. Natural mortality, especially intraspecific...