The final report is now available for a wildlife vehicle collision study conducted for the California Department of Transportation. Road Ecology Research Ecologist Marcel Huijserand Research Associate James Begley authored the final report for “Large Mammal-Vehicle Collision Hot Spot Analysis,” which provides guidance on the implementation of mitigation measures aimed at reducing collisions with large wild mammals along all state managed highways in California, with an emphasis on mule deer. These analyses identified the road sections that had the “highest” concentration of deer-vehicle crashes and mule deer carcasses. The hot spots were prioritized based on parameters related to human safety, biological conservation, and economics. Finally, the researchers provided practical guidelines for the implementation of mitigation measures and suggest mitigation strategies for the highest-ranking hot spots in each Caltrans district.
Graduate students at Montana State University had a great opportunity to participate in aquatics field research this summer, which was captured in feature article by the Montana State University (MSU) News Service. “MSU engineers, ecologists seek to improve fish passage on Yellowstone River” profiles grad students Haley Tupin and Ian Anderson, who gathered data at the Huntley Irrigation project on the Yellowstone River. The article includes numerous photos of the pair at work on the river and with the fish they studied.
The research project, conducted for Montana Fish, Wildlife and Parks, is investigating the effectiveness of a fish bypass channel that was constructed for the Huntley Irrigation Project. The data collected this summer will help determine if fish are using the bypass to navigate around the dam. WTI Research Scientist Matt Blank is a co-PI on the research project and serves on Haley Tupin’s graduate committee.
WTI, the MSU College of Engineering, and the Bozeman Fish Technology Center (BFTC) will continue their partnership with the U.S. Fish and Wildlife Service to study fish passage and the barriers that limit fish movements. Under a 5-year cooperative agreement, USFWS will sponsor a new phase of fish passage research projects, using the open channel flumes and swim chambers at BFTC as well as the hydraulics lab and computational/modeling facilities at MSU’s Department of Civil Engineering. The purpose of the research program is to characterize fish swimming performance and behavior, to enhance the design and operation of fish passages, and to develop new methods that improve landscape connectivity for fish and other aquatic organisms. The program also offers many hands-on research opportunities – in both labs and field sites – for undergraduate and graduate students. Read more about this partnership program on the Fish Passage and Ecohydraulics Research Group webpage.
WTI Road Ecologist Marcel Huijser will lead a cost-benefit analysis of an animal detection system (ADS) for the Montana Department of Transportation (MDT). MDT is considering a possible installation of an ADS along U.S. Highway 89, near Livingston, Montana. The analysis will investigate factors such as the number of wildlife vehicle collisions (WVCs) on the road segment; the costs associated with large animal WVCs; costs to purchase, install and maintain a system; and the life span and effectiveness of a system.
WTI is conducting a research on behalf of the Wyoming Game and Fish Department (WGFD) and the Wyoming Department of Transportation (WYDOT) to explore mitigation options for reducing wildlife vehicle collisions along Interstate 25 in central Wyoming. WYDOT and WGFD would like to explore the possibility of funneling large mammals, particularly mule deer and pronghorn, through the existing underpasses on this section of road rather than building new ones specifically designed for wildlife.
As one of the research steps, project researchers Marcel Huijser, Amanda Warren, and Elizabeth Fairbank collected preliminary data on wildlife use of existing structures under I-25 which were not originally designed for wildlife. Based on an eight-month monitoring effort in 2018-2019, the research team found that the structures are predominantly used by mule deer and white-tailed deer, but almost never by pronghorn. More details are available in the interim report (“Preliminary Data on Wildlife Use of Existing Structures along I-25, Kaycee, Wyoming, USA”), which was recently published and is available on the project page of the WTI website.
While wildlife fencing and crossing structures have been shown to reduce the effect of roads on medium and large animals, less is known about how these structures affect the movements of small mammals. The Canadian Journal of Zoology has published “Factors affecting the permeability of road mitigation measures to the movement of small mammals,” an article by Adam Ford and WTI Research Scientist Tony Clevenger, based on research they conducted on four small mammal species along the Trans-Canada Highway Corridor in Banff National Park. The article includes recommendations for culvert design and maintenance to promote usage of these structures by small mammal species to cross highways.
Citation: Ford, Adam T. and Clevenger, Anthony P. Factors affecting the permeability of road mitigation measures to the movement of small mammals. Canadian Journal of Zoology, 2019, 97(4): 379-384, https://doi.org/10.1139/cjz-2018-0165