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GRIZZLY TIMES REPORTS
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Technical Reports by the Grizzly Bear Recovery Project
Grizzly Bears & Ungulates in the Yellowstone Ecosystem
This publication provides a comprehensive review of relations between grizzly bears and large herbivores in the Yellowstone Ecosystem based on previously unpublished research.
For more see here.
Effects of Trains & Railways on Grizzly Bears
This technical report reviews research from throughout the Northern Hemisphere on how train and railways affect brown and grizzly bears, with an emphasis on the northern U.S. Rocky Mountains.
For more see here.
Heart of the Grizzly Bear Nation
This technical report examines the past, present, and future prospects of grizzly bears in the Northern Continental Divide population of Montana, including patterns and drivers of human-bear conflict, environmental change, and the validity of methods and metrics for managing grizzly bear mortality in this ecosystem.
Effects of Pedestrians on
Grizzly Bears
This technical report reviews research from throughout the Northern Hemisphere on how people on foot ("pedestrians") affect grizzly bears, with implications for human safety.
For more see here.
Efficacies & Effects of Sport Hunting on Grizzly Bears
This technical report comprehensively reviews research from throughout the Northern Hemisphere on how sport hunting directly and indirectly affects grizzly bears, human safety, human-bear conflict, and acceptance of bears by people.
For more see here.
The Grizzly Bear Promised Land
This technical report covers the past, present, and future prospects of grizzly bears in central and north-central Idaho--an area that once had robust grizzly bear populations extirpated by Europeans during the late 1800s and early 1900s, but with the current potential of perhaps supporting 1000 grizzlies.
For more see here.
Grizzly Bears for the Southwest
This technical report covers the history and current and future prospects of grizzly bears in the Southwest, emphasizing the history of bears prior to the arrival of Europeans and current conditions that provide ample potential for restoring grizzly bears to this region where they thrived for millennia.
For more see here.
Teaching Bears
This technical report report reviews the science related to potential efficacy of hazing and aversively conditioning bears, concluding that prospects of longer duration benefit is limited and that a focus on changing human behaviors is a better prospective means of addressing conflicts.
For more see here.
The Problem of State Wildlife Management
This report by Louisa Willcox and David Mattson summarizes the many problems besetting state wildlife management along with prospective strategies for promoting reform.
For more see here.
State Wildlife Management: A Graphical Diagnosis
This compilation of graphics summarizes research regarding social, psychological, narrational, and institutional elements typifying the problematic nature of state wildllife management. These graphics are a preview of a more comprehensive forthcoming report.
For more see here.
Dr. David Mattson produced a report in 2023 entitled Flawed Science that provides a comprehensive critique of not only the scientific products published by Yellowstone's Interagency Grizzly Bear Study Team (IGBST) during 2006-2023, but also the practices that led to and allowed for publication of this fundamentally flawed body of research. The IGBST's assessment of factors driving past and prospective future changes in demography and behavior of Yellowstone’s GYE grizzly bears was fatally compromised, including by equating omnivory with indifference to food quality; misrepresenting abundance of whitebark pine seeds; failing to account for temporal and spatial aspects of major environmental change; failing to consider the emergent effect of dietary changes on risk of death; using a suspect measure of bear density; failing to adequately account for bias introduced by increasing search effort and sightability of bears; misconstruing the concepts of density-dependence and carrying capacity; underspecifying models and hypotheses; and maintaining monopolistic control over scientific inquiry in a highly politicized environment. For more detail, click on the image at left to download the full report
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