Bob Gresswell, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 78
Life history migrations of adult Yellowstone Cutthroat Trout in the upper Yellowstone River Life history migrations of adult Yellowstone Cutthroat Trout in the upper Yellowstone River
Knowledge of salmonid life history types at the watershed scale is increasingly recognized as a cornerstone for effective management. In this study, we used radiotelemetry to characterize the life history movements of Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri in the upper Yellowstone River, an extensive tributary that composes nearly half of the drainage area of...
Authors
Brian D. Ertel, Thomas E. McMahon, Todd M. Koel, Robert E. Gresswell, Jason Burckhardt
Identifying movement patterns and spawning areas of Lake Trout in Yellowstone Lake Identifying movement patterns and spawning areas of Lake Trout in Yellowstone Lake
No abstract available.
Authors
Robert E. Gresswell, Nicholas A. Heredia, Jason G. Romine, Lee F. G. Gutowsky, Phillip T. Sandstrom, Michael J. Parsley, Patricia E. Bigelow, C. D. Suski, Brian D. Ertel
Early detection of nonnative alleles in fish populations: When sample size actually matters Early detection of nonnative alleles in fish populations: When sample size actually matters
Reliable detection of nonnative alleles is crucial for the conservation of sensitive native fish populations at risk of introgression. Typically, nonnative alleles in a population are detected through the analysis of genetic markers in a sample of individuals. Here we show that common assumptions associated with such analyses yield substantial overestimates of the likelihood of detecting...
Authors
Patrick Della Croce, Geoffrey C. Poole, Robert A. Payne, Robert E. Gresswell
Coldwater Streams Coldwater Streams
No abstract available.
Authors
Robert E. Gresswell, Bruce C. Vondracek
The waterfall paradox: How knickpoints disconnect hillslope and channel processes, isolating salmonid populations in ideal habitats The waterfall paradox: How knickpoints disconnect hillslope and channel processes, isolating salmonid populations in ideal habitats
Waterfalls create barriers to fish migration, yet hundreds of isolated salmonid populations exist above barriers and have persisted for thousands of years in steep mountainous terrain. Ecological theory indicates that small isolated populations in disturbance-prone landscapes are at greatest risk of extirpation because immigration and recolonization are not possible. On the contrary...
Authors
Christine May, Joshua J. Roering, Kyle Snow, Kitty Griswold, Robert E. Gresswell
Effects of stream-adjacent logging in fishless headwaters on downstream coastal cutthroat trout Effects of stream-adjacent logging in fishless headwaters on downstream coastal cutthroat trout
To investigate effects of headwater logging on downstream coastal cutthroat trout (Oncorhynchus clarkii clarkii) populations, we monitored stream habitat and biotic indicators including biomass, abundance, growth, movement, and survival over 8 years using a paired-watershed approach. Reference and logged catchments were located on private industrial forestland on ∼60-year harvest...
Authors
Douglas S. Bateman, Matthew R. Sloat, Robert E. Gresswell, Aaron M. Berger, David Hockman-Wert, David W. Leer, Arne E. Skaugset
Science and Products
Filter Total Items: 78
Life history migrations of adult Yellowstone Cutthroat Trout in the upper Yellowstone River Life history migrations of adult Yellowstone Cutthroat Trout in the upper Yellowstone River
Knowledge of salmonid life history types at the watershed scale is increasingly recognized as a cornerstone for effective management. In this study, we used radiotelemetry to characterize the life history movements of Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri in the upper Yellowstone River, an extensive tributary that composes nearly half of the drainage area of...
Authors
Brian D. Ertel, Thomas E. McMahon, Todd M. Koel, Robert E. Gresswell, Jason Burckhardt
Identifying movement patterns and spawning areas of Lake Trout in Yellowstone Lake Identifying movement patterns and spawning areas of Lake Trout in Yellowstone Lake
No abstract available.
Authors
Robert E. Gresswell, Nicholas A. Heredia, Jason G. Romine, Lee F. G. Gutowsky, Phillip T. Sandstrom, Michael J. Parsley, Patricia E. Bigelow, C. D. Suski, Brian D. Ertel
Early detection of nonnative alleles in fish populations: When sample size actually matters Early detection of nonnative alleles in fish populations: When sample size actually matters
Reliable detection of nonnative alleles is crucial for the conservation of sensitive native fish populations at risk of introgression. Typically, nonnative alleles in a population are detected through the analysis of genetic markers in a sample of individuals. Here we show that common assumptions associated with such analyses yield substantial overestimates of the likelihood of detecting...
Authors
Patrick Della Croce, Geoffrey C. Poole, Robert A. Payne, Robert E. Gresswell
Coldwater Streams Coldwater Streams
No abstract available.
Authors
Robert E. Gresswell, Bruce C. Vondracek
The waterfall paradox: How knickpoints disconnect hillslope and channel processes, isolating salmonid populations in ideal habitats The waterfall paradox: How knickpoints disconnect hillslope and channel processes, isolating salmonid populations in ideal habitats
Waterfalls create barriers to fish migration, yet hundreds of isolated salmonid populations exist above barriers and have persisted for thousands of years in steep mountainous terrain. Ecological theory indicates that small isolated populations in disturbance-prone landscapes are at greatest risk of extirpation because immigration and recolonization are not possible. On the contrary...
Authors
Christine May, Joshua J. Roering, Kyle Snow, Kitty Griswold, Robert E. Gresswell
Effects of stream-adjacent logging in fishless headwaters on downstream coastal cutthroat trout Effects of stream-adjacent logging in fishless headwaters on downstream coastal cutthroat trout
To investigate effects of headwater logging on downstream coastal cutthroat trout (Oncorhynchus clarkii clarkii) populations, we monitored stream habitat and biotic indicators including biomass, abundance, growth, movement, and survival over 8 years using a paired-watershed approach. Reference and logged catchments were located on private industrial forestland on ∼60-year harvest...
Authors
Douglas S. Bateman, Matthew R. Sloat, Robert E. Gresswell, Aaron M. Berger, David Hockman-Wert, David W. Leer, Arne E. Skaugset