Mark Haroldson
Mark Haroldson is an emeritus USGS Wildlife Biologist for the Interagency Grizzly Bears Study Team and works out of the Northern Rocky Mountain Science Center, Bozeman, MT.
Research Interest
Mark has had a passion for bears since he began studying them as an undergraduate in 1976. He has worked in bear research and management in several western states ever since. Since 1984 he has worked in various capacities for the Interagency Grizzly Bear Study Team in the Greater Yellowstone Ecosystem. Current research is focused on mortality and population trend of grizzly bears in the Greater Yellowstone Ecosystem.
Education and Certifications
B.S. Wildlife Biology, 1979, University of Montana
Graduate level class work, 1982-88, University of Montana
Science and Products
Filter Total Items: 89
Whitebark pine cone production - 2020 Whitebark pine cone production - 2020
No abstract available.
Authors
Mark Haroldson, Frank van Manen
Potential for recreational restrictions to reduce grizzly bear–caused human injuries Potential for recreational restrictions to reduce grizzly bear–caused human injuries
In 2011, 2 hikers were killed by grizzly bears (Ursus arctos) in separate incidents on backcountry trails in Hayden Valley, Yellowstone National Park, USA (YNP). Hayden Valley provides prime habitat for grizzly bears and is known to have high densities of bears. During 1970–2017, 23% (10 of 44) of all backcountry grizzly bear–inflicted human injuries and fatalities in YNP occurred in the...
Authors
Kerry Gunther, Mark Haroldson
Primarily resident grizzly bears respond to late-season elk harvest Primarily resident grizzly bears respond to late-season elk harvest
Autumn ungulate hunting in the Greater Yellowstone Ecosystem carries the risk of hunter–grizzly bear (Ursus arctos) conflict and creates a substantial challenge for managers. For Grand Teton National Park, Wyoming, USA, a key information need is whether increased availability of elk (Cervus canadensis) carcasses during a late autumn (Nov–Dec) harvest within the national park attracts...
Authors
Frank van Manen, Michael Ebinger, David Gustine, Mark Haroldson, Katharine Wilmot, Craig Whitman
Yellowstone grizzly bear investigations: Annual report of the Interagency Grizzly Bear Study Team 2018 Yellowstone grizzly bear investigations: Annual report of the Interagency Grizzly Bear Study Team 2018
This annual report summarizes the results of grizzly bear (Ursus arctos) research and monitoring conducted in the Greater Yellowstone Ecosystem (GYE) by the Interagency Grizzly Bear Study Team (IGBST) during 2018. The research and monitoring program is focused on population estimation and demographics, food monitoring, and habitat monitoring. The report also contains a summary of grizzly...
Authors
Frank T. van Manen, Mark A. Haroldson, Bryn Karabensh
Estimating distemper virus dynamics among wolves and grizzly bears using serology and Bayesian state‐space models Estimating distemper virus dynamics among wolves and grizzly bears using serology and Bayesian state‐space models
Many parasites infect multiple hosts, but estimating the transmission across host species remains a key challenge in disease ecology. We investigated the within and across host species dynamics of canine distemper virus (CDV) in grizzly bears (Ursus arctos) and wolves (Canis lupus) of the Greater Yellowstone Ecosystem (GYE). We hypothesized that grizzly bears may be more likely to be...
Authors
Paul Cross, Frank van Manen, Mafalda Viana, Emily Almberg, Daniel Bachen, Ellen Brandell, Mark Haroldson, Peter Hudson, Daniel Stahler, Douglas Smith
Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2017 Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2017
This Annual Report summarizes results of grizzly bear (Ursus arctos) monitoring and research conducted in the Greater Yellowstone Ecosystem (GYE) by the Interagency Grizzly Bear Study Team (IGBST) during 2017. This report also contains a summary of grizzly bear management actions to address conflict situations. Annual reports of the IGBST summarize annual data collection. Because...
Potential paths for male-mediated gene flow to and from an isolated grizzly bear population Potential paths for male-mediated gene flow to and from an isolated grizzly bear population
For several decades, grizzly bear populations in the Greater Yellowstone Ecosystem (GYE) and the Northern Continental Divide Ecosystem (NCDE) have increased in numbers and range extent. The GYE population remains isolated and although effective population size has increased since the early 1980s, genetic connectivity between these populations remains a long-term management goal. With...
Authors
Christopher Peck, Frank van Manen, Cecily Costello, Mark Haroldson, Lisa Landenburger, Lori Roberts, Daniel Bjornlie, Richard Mace
Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2016 Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2016
This Annual Report summarizes results of grizzly bear (Ursus arctos) monitoring and research conducted in the Greater Yellowstone Ecosystem (GYE) by the Interagency Grizzly Bear Study Team (IGBST) during 2016. The report also contains a summary of grizzly bear management actions to address conflict situations.
Diet and macronutrient optimization in wild ursids: A comparison of grizzly bears with sympatric and allopatric black bears Diet and macronutrient optimization in wild ursids: A comparison of grizzly bears with sympatric and allopatric black bears
When fed ad libitum, ursids can maximize mass gain by selecting mixed diets wherein protein provides 17 ± 4% of digestible energy, relative to carbohydrates or lipids. In the wild, this ability is likely constrained by seasonal food availability, limits of intake rate as body size increases, and competition. By visiting locations of 37 individuals during 274 bear-days, we documented...
Authors
Cecily M. Costello, Steven Cain, Shannon Pils, Leslie Frattaroli, Mark Haroldson, Frank van Manen
Detecting grizzly bear use of ungulate carcasses using global positioning system telemetry and activity data Detecting grizzly bear use of ungulate carcasses using global positioning system telemetry and activity data
Global positioning system (GPS) wildlife collars have revolutionized wildlife research. Studies of predation by free-ranging carnivores have particularly benefited from the application of location clustering algorithms to determine when and where predation events occur. These studies have changed our understanding of large carnivore behavior, but the gains have concentrated on obligate...
Authors
Michael Ebinger, Mark Haroldson, Frank van Manen, Cecily M. Costello, Daniel D. Bjornlie, Daniel Thompson, Kerry Gunther, Jennifer K. Fortin, Justin Teisberg, Shannon Pils, P White, Steven Cain, Paul Cross
Science and Products
Filter Total Items: 89
Whitebark pine cone production - 2020 Whitebark pine cone production - 2020
No abstract available.
Authors
Mark Haroldson, Frank van Manen
Potential for recreational restrictions to reduce grizzly bear–caused human injuries Potential for recreational restrictions to reduce grizzly bear–caused human injuries
In 2011, 2 hikers were killed by grizzly bears (Ursus arctos) in separate incidents on backcountry trails in Hayden Valley, Yellowstone National Park, USA (YNP). Hayden Valley provides prime habitat for grizzly bears and is known to have high densities of bears. During 1970–2017, 23% (10 of 44) of all backcountry grizzly bear–inflicted human injuries and fatalities in YNP occurred in the...
Authors
Kerry Gunther, Mark Haroldson
Primarily resident grizzly bears respond to late-season elk harvest Primarily resident grizzly bears respond to late-season elk harvest
Autumn ungulate hunting in the Greater Yellowstone Ecosystem carries the risk of hunter–grizzly bear (Ursus arctos) conflict and creates a substantial challenge for managers. For Grand Teton National Park, Wyoming, USA, a key information need is whether increased availability of elk (Cervus canadensis) carcasses during a late autumn (Nov–Dec) harvest within the national park attracts...
Authors
Frank van Manen, Michael Ebinger, David Gustine, Mark Haroldson, Katharine Wilmot, Craig Whitman
Yellowstone grizzly bear investigations: Annual report of the Interagency Grizzly Bear Study Team 2018 Yellowstone grizzly bear investigations: Annual report of the Interagency Grizzly Bear Study Team 2018
This annual report summarizes the results of grizzly bear (Ursus arctos) research and monitoring conducted in the Greater Yellowstone Ecosystem (GYE) by the Interagency Grizzly Bear Study Team (IGBST) during 2018. The research and monitoring program is focused on population estimation and demographics, food monitoring, and habitat monitoring. The report also contains a summary of grizzly...
Authors
Frank T. van Manen, Mark A. Haroldson, Bryn Karabensh
Estimating distemper virus dynamics among wolves and grizzly bears using serology and Bayesian state‐space models Estimating distemper virus dynamics among wolves and grizzly bears using serology and Bayesian state‐space models
Many parasites infect multiple hosts, but estimating the transmission across host species remains a key challenge in disease ecology. We investigated the within and across host species dynamics of canine distemper virus (CDV) in grizzly bears (Ursus arctos) and wolves (Canis lupus) of the Greater Yellowstone Ecosystem (GYE). We hypothesized that grizzly bears may be more likely to be...
Authors
Paul Cross, Frank van Manen, Mafalda Viana, Emily Almberg, Daniel Bachen, Ellen Brandell, Mark Haroldson, Peter Hudson, Daniel Stahler, Douglas Smith
Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2017 Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2017
This Annual Report summarizes results of grizzly bear (Ursus arctos) monitoring and research conducted in the Greater Yellowstone Ecosystem (GYE) by the Interagency Grizzly Bear Study Team (IGBST) during 2017. This report also contains a summary of grizzly bear management actions to address conflict situations. Annual reports of the IGBST summarize annual data collection. Because...
Potential paths for male-mediated gene flow to and from an isolated grizzly bear population Potential paths for male-mediated gene flow to and from an isolated grizzly bear population
For several decades, grizzly bear populations in the Greater Yellowstone Ecosystem (GYE) and the Northern Continental Divide Ecosystem (NCDE) have increased in numbers and range extent. The GYE population remains isolated and although effective population size has increased since the early 1980s, genetic connectivity between these populations remains a long-term management goal. With...
Authors
Christopher Peck, Frank van Manen, Cecily Costello, Mark Haroldson, Lisa Landenburger, Lori Roberts, Daniel Bjornlie, Richard Mace
Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2016 Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2016
This Annual Report summarizes results of grizzly bear (Ursus arctos) monitoring and research conducted in the Greater Yellowstone Ecosystem (GYE) by the Interagency Grizzly Bear Study Team (IGBST) during 2016. The report also contains a summary of grizzly bear management actions to address conflict situations.
Diet and macronutrient optimization in wild ursids: A comparison of grizzly bears with sympatric and allopatric black bears Diet and macronutrient optimization in wild ursids: A comparison of grizzly bears with sympatric and allopatric black bears
When fed ad libitum, ursids can maximize mass gain by selecting mixed diets wherein protein provides 17 ± 4% of digestible energy, relative to carbohydrates or lipids. In the wild, this ability is likely constrained by seasonal food availability, limits of intake rate as body size increases, and competition. By visiting locations of 37 individuals during 274 bear-days, we documented...
Authors
Cecily M. Costello, Steven Cain, Shannon Pils, Leslie Frattaroli, Mark Haroldson, Frank van Manen
Detecting grizzly bear use of ungulate carcasses using global positioning system telemetry and activity data Detecting grizzly bear use of ungulate carcasses using global positioning system telemetry and activity data
Global positioning system (GPS) wildlife collars have revolutionized wildlife research. Studies of predation by free-ranging carnivores have particularly benefited from the application of location clustering algorithms to determine when and where predation events occur. These studies have changed our understanding of large carnivore behavior, but the gains have concentrated on obligate...
Authors
Michael Ebinger, Mark Haroldson, Frank van Manen, Cecily M. Costello, Daniel D. Bjornlie, Daniel Thompson, Kerry Gunther, Jennifer K. Fortin, Justin Teisberg, Shannon Pils, P White, Steven Cain, Paul Cross