Search Results - "Collis, Ken"

Cumulative effects of piscivorous colonial waterbirds on juvenile salmonids: A multi predator-prey species evaluation by Evans, Allen F, Payton, Quinn, Hostetter, Nathan J, Collis, Ken, Cramer, Bradley M, Roby, Daniel D

“…We investigated the cumulative effects of predation by piscivorous colonial waterbirds on the survival of multiple salmonid ( Oncorhynchus spp.) populations…”
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Predation probabilities and functional responses: How piscivorous waterbirds respond to pulses in fish abundance by Hostetter, Nathan J., Payton, Quinn, Roby, Daniel D., Collis, Ken, Evans, Allen F.

“…How predators respond to changes in prey abundance (i.e., functional responses) is foundational to consumer–resource interactions, predator–prey dynamics, and…”
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Colony Size and Diet Composition of Piscivorous Waterbirds on the Lower Columbia River: Implications for Losses of Juvenile Salmonids to Avian Predation by Collis, Ken, Roby, Daniel D., Craig, David P., Adamany, Stephanie, Adkins, Jessica Y., Lyons, Donald E.

“…We investigated colony size and diet composition of piscivorous waterbirds (gulls, terns, and cormorants) nesting on the lower Columbia River from the mouth…”
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Caspian Tern Predation on Juvenile Salmonids in the Mid‐Columbia River by Antolos, Michelle, Roby, Daniel D., Lyons, Donald E., Collis, Ken, Evans, Allen F., Hawbecker, Mike, Ryan, Brad A.

“…We used a bioenergetics approach to determine the magnitude of predation by Caspian terns Sterna caspia on juvenile salmonids Oncorhynchus spp. in the…”
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A Review of Factors Affecting the Susceptibility of Juvenile Salmonids to Avian Predation by Hostetter, Nathan J., Evans, Allen F., Payton, Quinn, Roby, Daniel D., Lyons, Donald E., Collis, Ken

“…We reviewed studies of piscivorous colonial waterbird predation on juvenile salmonids to synthesize current knowledge of factors affecting fish susceptibility…”
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Measuring the additive effects of predation on prey survival across spatial scales by Payton, Quinn, Evans, Allen F., Hostetter, Nathan J., Roby, Daniel D., Cramer, Brad, Collis, Ken

“…The degree to which predation is an additive vs. compensatory source of mortality is fundamental to understanding the effects of predation on prey populations…”
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Caspian Tern Management to Increase Survival of Juvenile Salmonids in the Columbia River Basin: Progress and Adaptive Management Considerations by Collis, Ken, Roby, Daniel D., Evans, Allen F., Lawes, Timothy J., Lyons, Donald E.

“…Predation by Caspian terns Hydroprogne caspia is a factor limiting the recovery of some Endangered Species Act‐listed populations of salmonids from the…”
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Caspian Tern Response to Managed Reductions in Nesting Habitat by SCHNIEDERMEYER, ETHAN, ROBY, DANIEL D., LYONS, DONALD E., SUZUKI, YASUKO, COLLIS, KEN

“…Predation on smolts by Caspian terns (Hydroprogne caspia) has been identified as a factor limiting the restoration of some populations of anadromous salmonids…”
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Cumulative Effects of Avian Predation on Upper Columbia River Steelhead by Evans, Allen F., Payton, Quinn, Cramer, Bradley M., Collis, Ken, Hostetter, Nathan J., Roby, Daniel D., Dotson, Curtis

“…To investigate the cumulative effects of colonial waterbird predation on fish mortality and to determine what proportion of all sources of fish mortality (1 −…”
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Susceptibility of Juvenile Steelhead to Avian Predation: the Influence of Individual Fish Characteristics and River Conditions by Hostetter, Nathan J, Evans, Allen F, Roby, Daniel D, Collis, Ken

“…Identification of the factors that influence susceptibility to predation can aid in developing management strategies to recover fish populations of…”
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Avian Predation on Juvenile Salmonids: Spatial and Temporal Analysis Based on Acoustic and Passive Integrated Transponder Tags by Evans, Allen F., Payton, Quinn, Turecek, Aaron, Cramer, Bradley, Collis, Ken, Roby, Daniel D., Loschl, Peter J., Sullivan, Leah, Skalski, John, Weiland, Mark, Dotson, Curtis

“…We evaluated the impact of predation on juvenile steelhead Oncorhynchus mykiss and yearling and subyearling Chinook Salmon O. tshawytscha by piscivorous…”
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Systemwide Evaluation of Avian Predation on Juvenile Salmonids from the Columbia River Based on Recoveries of Passive Integrated Transponder Tags by Evans, Allen F., Hostetter, Nathan J., Roby, Daniel D., Collis, Ken, Lyons, Donald E., Sandford, Benjamin P., Ledgerwood, Richard D., Sebring, Scott

“…We recovered passive integrated transponder (PIT) tags from nine piscivorous waterbird colonies in the Columbia River basin to evaluate avian predation on…”
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Colonial Waterbird Predation on Lost River and Shortnose Suckers in the Upper Klamath Basin by Evans, Allen F., Hewitt, David A., Payton, Quinn, Cramer, Bradley M., Collis, Ken, Roby, Daniel D.

“…We evaluated predation on Lost River Suckers Deltistes luxatus and Shortnose Suckers Chasmistes brevirostris by American white pelicans Pelecanus…”
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Quantifying Avian Predation on Fish Populations: Integrating Predator-Specific Deposition Probabilities in Tag Recovery Studies by Hostetter, Nathan J, Evans, Allen F, Cramer, Bradley M, Collis, Ken, Lyons, Donald E, Roby, Daniel D

“…Accurate assessment of specific mortality factors is vital to prioritize recovery actions for threatened and endangered species. For decades, tag recovery…”
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Influence of Individual Fish Characteristics on Survival and Detection: Similarities across Two Salmonid Species by Hostetter, Nathan J, Evans, Allen F, Loge, Frank J, O'Connor, Rolland R, Cramer, Bradley M, Fryer, Derek, Collis, Ken

“…Trait-selective mortality is of considerable management and conservation interest, especially when trends are similar across multiple species of conservation…”
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Recent population size, trends, and limiting factors for the double-crested cormorant in western North America by Adkins, Jessica Y., Roby, Daniel D., Lyons, Donald E., Courtot, Karen N., Collis, Ken, Carter, Harry R., Shuford, W. David, Capitolo, Phillip J.

“…The status of the double-crested cormorant (Phalacrocorax auritus) in western North America was last evaluated during 1987-2003. In the interim, concern has…”
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Recent population size, trends, and limiting factors for the double-crested cormorant in western North America: Double-Crested Cormorant Population Trends by Adkins, Jessica Y., Roby, Daniel D., Lyons, Donald E., Courtot, Karen N., Collis, Ken, Carter, Harry R., Shuford, W. David, Capitolo, Phillip J.

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Potential Effects of Management on Caspian Tern Hydroprogne caspia Predation on Juvenile Salmonids at a Colony in San Francisco Bay, California by Adrean, Lindsay J, Roby, Daniel D, Lyons, Donald E, Collis, Ken, Evans, Allen F

“…San Francisco Bay is a proposed relocation site for some of the Caspian terns Hydroprogne caspia currently nesting at the world's largest colony for the…”
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Developing Nondestructive Techniques for Managing Conflicts Between Fisheries and Double-Crested Cormorant Colonies by Yasuko Suzuki, Daniel D. Roby, Donald E. Lyons, Karen N. Courtot, Ken Collis

“…Double-crested cormorants (Phalacrocorax auritus) have been identified as the source of significant mortality to juvenile salmonids (Oncorhynchusspp.) in the…”
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Recovery of Coded Wire Tags at a Caspian Tern Colony in San Francisco Bay: A Technique to Evaluate Impacts of Avian Predation on Juvenile Salmonids by Evans, Allen F., Roby, Daniel D., Collis, Ken, Cramer, Bradley M., Sheggeby, John A., Adrean, Lindsay J., Battaglia, Daniel S., Lyons, Donald E.

“…We recovered coded wire tags (CWTs) from a colony of Caspian terns Hydroprogne caspia on Brooks Island in San Francisco Bay, California, to evaluate predation…”
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