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Creator:: Adkins, Jessica Y., Lyons, Donald E., Loschl, Peter J., Roby, Daniel D., Collis, Ken, Evans, Allen F., and Hostetter, Nathan J.
Abstract:: We investigated colony size, productivity, and limiting factors for five piscivorous waterbird species nesting at 18 locations on the Columbia Plateau (Washington) during 2004–2010 with emphasis on species with a history of salmonid (Oncorhynchus spp.) depredation. Numbers of nesting Caspian terns (Hydroprogne caspia) and double-crested cormorants (Phalacrocorax auritus) were stable...
Resource Type:: Article
Full Text:: , Oregon State University, Corvallis, Oregon 97331 Ken Collis2, Allen F. Evans, Nathan J. Hostetter, Real

Creator:: Hostetter, Nathan J., Evans, Allen F., Cramer, Bradley M., Collis, Ken, Lyons, Donald E., and Roby, Daniel D.
Abstract:: Accurate assessment of specific mortality factors is vital to prioritize recovery actions for threatened and endangered species. For decades, tag recovery methods have been used to estimate fish mortality due to avian predation. Predation probabilities derived from fish tag recoveries on piscivorous waterbird colonies typically reflect minimum estimates of predation...
Full Text:: -Specific Deposition Probabilities in Tag Recovery Studies Nathan J. Hostetter,*1 Allen F. Evans, Bradley M

Creator:: Hostetter, Nathan J., Evans, Allen F., Cramer, Bradley M., Collis, Ken, Lyons, Donald E., and Roby, Daniel D.
Abstract:: Accurate assessment of specific mortality factors is vital to prioritize recovery actions for threatened and endangered species. For decades, tag recovery methods have been used to estimate fish mortality due to avian predation. Predation probabilities derived from fish tag recoveries on piscivorous waterbird colonies typically reflect minimum estimates of predation...

Creator:: Hostetter, Nathan J., Evans, Allen F., Cramer, Bradley M., Collis, Ken, Lyons, Donald E., and Roby, Daniel D.
Abstract:: Accurate assessment of specific mortality factors is vital to prioritize recovery actions for threatened and endangered species. For decades, tag recovery methods have been used to estimate fish mortality due to avian predation. Predation probabilities derived from fish tag recoveries on piscivorous waterbird colonies typically reflect minimum estimates of predation...
Resource Type:: Article

Creator:: Collis, Ken, Roby, Daniel D., Larson, Keith W., Adrean, Lindsay J., Nelson, S. Kim, Evans, Allen F., Hostetter, Nathan, Battaglia, Dan, Lyons, Donald E., Marcella, Tim, and Patterson, Allison
Abstract:: Colony size, nesting ecology and diet of Caspian Terns (Hydroprogne caspia) were investigated in the San Francisco Bay area (SFBA) during 2003-2009 to assess the potential for conservation of the tern breeding population and possible negative effects of predation on survival of juvenile salmonids (Oncorhynchus spp.). Numbers of breeding Caspian...
Resource Type:: Article
Full Text:: J. ADREAN3, S. KIM NELSON3, ALLEN F. EVANS1, NATHAN HOSTETTER1, DAN BATTAGLIA3, DONALD E. LYONS3

Creator:: Evans, Allen F., Hostetter, Nathan J., Roby, Daniel D., Collis, Ken, Lyons, Donald E., Sandford, Benjamin P., Ledgerwood, Richard D., and Sebring, Scott
Abstract:: We recovered passive integrated transponder (PIT) tags from nine piscivorous waterbird colonies in the Columbia River basin to evaluate avian predation on Endangered Species Act (ESA)-listed salmonid Oncorhynchus spp. populations during 2007–2010. Avian predation rates were calculated based on the percentage of PIT-tagged juvenile salmonids that were detected as passing...
Resource Type:: Article
Full Text:: Transponder Tags Allen F. Evans and Nathan J. Hostetter Real Time Research, Inc., 52 Southwest Roosevelt

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