00745661

Component

This paper presents results of data collected from weekly surveys of traffic induced mortality of barn owls at three sites along two California highways in rural areas from May 25, 1995 to November 26, 1995. For each owl, spot of collection, adjacent habitat and current weather conditions were recorded. Age and sex of the collected owls were determined by differences in molt patterns, plumage and body size. There was a significant difference in the number of collected owls between the three sites. Differences in the adjacent habitat appear to be responsible for the distribution of fatalities among the three sites. Of the 227 owls collected, 61% were juveniles and 39% were adults. There was a significantly skewed sex-ratio: 74% of the collected owls were females. Differences in local population demography and/or vulnerability may result in a greater number of both female and hatching year owls collected. A life history model was constructed in order to assess the impact of traffic related mortality on the growth rate of these populations. Results from the model predict that when about 48% of adult mortality is due to traffic or 27% of the hatching year mortality is due to traffic, the population growth rate drops below one and the population is in decline.

Also published by Florida DOT as a paper in FL-ER-58-96, "Trends in Addressing Transportation Related Wildlife Mortality: Proceedings of the Transportation Related Wildlife Mortality Seminar (June 1996).

FHWA-PD-96-041

English

p. 125-140

1996-8

Transportation and Wildlife: Reducing Wildlife Mortality and Improving Wildlife Passageways Across Transportation Corridors

Appendices (1) ; Figures (7) ; References; Tables (2)

Age; Fatalities; Gender; Habitat (Ecology); Population growth; Rural highways; Wildlife

Mortality

California

California

Design; Environment; Highways; Planning and Forecasting; Society; I21: Planning of Transport Infrastructure

TRIS

Mar 2 1998 12:00AM

• A LANDSCAPE APPROACH TO EXAMINING THE IMPACTS OF ROADS ON THE ECOLOGICAL FUNCTION ASSOCIATED WITH WILDLIFE MOVEMENT AND MOVEMENT CORRIDORS: PROBLEMS AND SOLUTIONS
• A PRELIMINARY CONSIDERATION OF HIGHWAY IMPACTS ON HERPETOFAUNA INHABITING SMALL ISOLATED WETLANDS IN THE SOUTHEASTERN U.S. COASTAL PLAIN
• AN OVERVIEW OF BLACK BEAR ROADKILLS IN FLORIDA 1976-1995
• EFFECTS OF LINEAR DEVELOPMENTS ON WINTER MOVEMENTS OF GRAY WOLVES IN THE BOW RIVER VALLEY OF BANFF NATIONAL PARK, ALBERTA
• EFFECTS OF ROADKILL MORTALITY ON THE WESTERN PAINTED TURTLE (CHRYSEMYS PICTA BELLII) IN THE MISSION VALLEY, WESTERN MONTANA
• EFFECTS OF TRANSPORTATION CORRIDORS ON LARGE CARNIVORES IN THE BOW RIVER VALLEY, ALBERTA
• EVALUATION OF THE S.R. 46 WILDLIFE CROSSING IN LAKE COUNTY, FLORIDA
• FLORIDA DEPARTMENT OF TRANSPORTATION INITIATIVES RELATED TO WILDLIFE MORTALITY
• FLORIDA'S ECOSYSTEM MANAGEMENT AND WILDLIFE
• HABITAT: A LANDSCAPE ARCHITECTURE PERSPECTIVE
• HIGHWAY CONFLICTS AND RESOLUTIONS IN BANFF NATIONAL PARK, ALBERTA
• HIGHWAY MORTALITY IN DESERT TORTOISES AND SMALL VERTEBRATES: SUCCESS OF BARRIER FENCES AND CULVERTS
• KEY DEER MORTALITY, U.S. 1 IN THE FLORIDA KEYS
• MINNESOTA EXPERIENCE WITH DEER REFLECTORS
• MULE DEER HIGHWAY MORTALITY IN NORTHEASTERN UTAH: CAUSES, PATTERNS AND A NEW MITIGATIVE TECHNIQUE
• PROTECTED SPECIES IMPACTS AND HABITAT MANAGEMENT ASSOCIATED WITH TRANSPORTATION PROJECTS IN NORTH CAROLINA
• ROAD ECOLOGY AND ROAD DENSITY IN DIFFERENT LANDSCAPES, WITH INTERNATIONAL PLANNING AND MITIGATION SOLUTIONS
• ROADS, RAILS AND THE ENVIRONMENT: WILDLIFE AT THE INTERSECTION IN CANADA'S WESTERN MOUNTAINS
• SALMON PASSAGE AND OTHER WILDLIFE ACTIVITIES IN WASHINGTON STATE
• TEXAS DEPARTMENT OF TRANSPORTATION WILDLIFE ACTIVITIES
• THE RELATIONSHIP BETWEEN RARE CARNIVORES AND HIGHWAYS
• TRANSPORTATION AND WILDLIFE: REDUCING WILDLIFE MORTALITY AND IMPROVING WILDLIFE PASSAGEWAYS ACROSS TRANSPORTATION CORRIDORS. PROCEEDINGS OF THE FLORIDA DEPARTMENT OF TRANSPORTATION/FEDERAL HIGHWAY ADMINISTRATION TRANSPORTATION-RELATED WILDLIFE MORTALITY SEMINAR, ORLANDO, FLORIDA, APRIL 30-MAY 2, 1996
• UNDERPASS SYSTEMS FOR AMPHIBIANS
• WILDLIFE AND WILDLIFE HABITAT IMPACT ISSUES AND MITIGATION OPTIONS FOR RECONSTRUCTION OF U.S. HIGHWAY 93 ON THE FLATHEAD INDIAN RESERVATION, MONTANA
• WILDLIFE CROSSING DESIGNS AND USE BY FLORIDA PANTHERS AND OTHER WILDLIFE IN SOUTHWEST FLORIDA
• WILDLIFE HABITAT EVALUATION/UPLAND MITIGATION: THE PENNSYLVANIA DEPARTMENT OF TRANSPORTATION PERSPECTIVE
• YELLOWSTONE TO CODY RECONSTRUCTION PROJECT