A partnership between Oregon State University, Real Time Research, and the USGS - Oregon Cooperative Fish and Wildlife Research Unit

Adkins, J.Y., D.D. Roby, D.E. Lyons, K.N. Courtot, K. Collis, H.R. Carter, W.D. Shuford, and P.J. Capitolo. 2014. Recent population size, trends, and limiting factors for the double-crested cormorant in Western North America. Journal of Wildlife Management 78:1131-1142.

​Adkins, J.Y., D.E. Lyons, P.J. Loschl, D.D. Roby, K. Collis, A.F. Evans, and N.J. Hostetter. 2014. Demographics of piscivorous colonial waterbirds and management implications for ESA-listed salmonids on the Columbia Plateau. Northwest Science 88:344-359

Adrean, L.J., D.D. Roby, D.E. Lyons, K. Collis, and A.F. Evans. 2012. Potential effects of management on Caspian tern Hydroprogne caspia predation on juvenile salmonids at a colony in San Francisco Bay, California. Transactions of the American Fisheries Society 141:1682-1696.

Anderson, C.D., D.D. Roby, and K. Collis. 2004. Conservation implications of the large colony of double-crested cormorants on East Sand Island, Columbia River estuary, Oregon, USA. Waterbirds 27:155-160.

Anderson, C.D., D.D. Roby, and K. Collis. 2004. Foraging patterns of male and female double-crested cormorants nesting in the Columbia River estuary. Canadian Journal of Zoology 82:541-554.

Anderson, S.K., D.D. Roby, D.E. Lyons, and K. Collis. 2005. Factors affecting chick provisioning by Caspian terns nesting in the Columbia River estuary. Waterbirds 28:95-105. 

Anderson, S.K., D.D. Roby, D.E. Lyons, and K. Collis. 2007. Relationship of Caspian tern foraging ecology to nesting success in the Columbia River estuary, Oregon, USA. Estuarine, Coastal, and Shelf Science 73:447-456.

Antolos, M., D.D. Roby, and K. Collis. 2004. Breeding ecology of Caspian terns at colonies on the Columbia Plateau. Northwest Science 78:303-312.

Antolos, M., D.D. Roby, D.E. Lyons, K. Collis, A.F. Evans, M. Hawbecker, and B.A. Ryan. 2005. Caspian tern predation on juvenile salmonids in the Mid-Columbia River. Transactions of the American Fisheries Society 134:466-480.

Antolos, M., D.D. Roby, D.E. Lyons, S.K. Anderson, and K. Collis. 2006. Effects of nest density, location, and timing on breeding success of Caspian terns. Waterbirds 29:465-472.

Collar, S., D.D. Roby, and D.E. Lyons. 2017. Top-down and bottom-up interactions influence fledging success at North America's largest colony of Caspian terns (Hydroprogne caspia). Estuaries and Coasts 40:1808-1818.

Collis, K., D.D. Roby, D.P. Craig, B.A. Ryan, and R.D. Ledgerwood. 2001. Colonial waterbird predation on juvenile salmonids tagged with Passive Integrated Transponders in the Columbia River Estuary: Vulnerability of different species, stocks, and rearing types. Transactions of the American Fisheries Society 130:385–396. 

Collis, K., D.D. Roby, D.P. Craig, S. Adamany, J. Adkins, and D.E. Lyons. 2002. Colony size and diet composition of piscivorous waterbirds on the lower Columbia River: Implications for losses of juvenile salmonids to avian predation. Transactions of the American Fisheries Society 131:537–550.

Collis, K., D.D. Roby, C.W. Thompson, D.E. Lyons, and M. Tirhi. 2002. Barges as temporary breeding sites for Caspian terns: Assessing potential sites for colony restoration. Wildlife Society Bulletin 30:1140–1149.  

Collis, K., D.D. Roby, K.W. Larson, L.J. Adrean, S.K. Nelson, A.F. Evans, N.J. Hostetter, D.S. Battaglia, D.E. Lyons, T.K. Marcella, and A. Patterson. 2012. Trends in Caspian tern nesting and diet in San Francisco Bay: Conservation implications for terns and salmonids. Waterbirds 35:25-34.

Collis, K., D.D. Roby, A.F. Evans, T.J. Lawes, and D.E. Lyons. 2023. Caspian tern management to increase survival of juvenile salmonids in the Columbia River basin: Progress and adaptive management considerations. Fisheries DOI:10.1002/fsh.11012.

Connon, R.E., L.S. D'Abronzo, N.J. Hostetter, A. Javidmehr, D.D. Roby, A.F. Evans, F.J. Loge, and I. Werner. 2012. Transcription profiling in environmental diagnostics: Health assessments in Columbia River basin steelhead (Oncorhynchus mykiss). Environmental Science and Technology 46:6081-6087.

Courtot, K.N., Roby, D.D., Adkins, J.Y., Lyons, D.E., King, D.T., and Larsen, R.S. 2012. Colony connectivity of Pacific Coast double-crested cormorants based on post-breeding dispersal from the region's largest colony. Journal of Wildlife Management 76:1462-1471. 

Evans, A.F., D.D. Roby, K. Collis, B.M. Cramer, J.A. Sheggeby, L.J. Adrean, D.S. Battaglia, and D.E. Lyons. 2011. Recovery of coded wire tags on a Caspian tern colony in San Francisco Bay: A technique to evaluate impacts of avian predation on juvenile salmonids.  North American Journal of Fisheries Management 31:79-87.  

Evans, A.F., N.J. Hostetter, D.D. Roby, K. Collis, D.E. Lyons, B.P. Sandford, and R.D. Ledgerwood. 2012. System-wide evaluation of avian predation on juvenile salmonids from the Columbia River based on recoveries of Passive Integrated Transponder tags. Transactions of the American Fisheries Society 141:975-989. 

Evans, A.F., N.J. Hostetter, K. Collis, D.D. Roby, and F.J. Loge. 2014. Relationship between juvenile fish condition and survival to adulthood in steelhead. Transactions of the American Fisheries Society 143:899-909.

Evans, A.F., Q. Payton, A. Turecek, B.M. Cramer, K. Collis, D.D. Roby, P.J. Loschl, L. Sullivan, J. Skalski, M. Weiland, and C. Dotson. 2016. Avian predation on juvenile salmonids: Spatial and temporal analysis based on acoustic and Passive Integrated Transponder tags.  Transactions of the American Fisheries Society 145:860-877.

Evans, A.F., D.A. Hewitt, Q. Payton, B.M. Cramer, K. Collis, and D.D. Roby. 2016. Colonial waterbird predation on Lost River and Shortnose suckers in the Upper Klamath Basin. North American Journal of Fisheries Management 36:1254-1268.

Evans, A.F., Q. Payton, B.M. Cramer, K. Collis, N.J. Hostetter, D.D. Roby, and C. Dotson. 2019. Cumulative effects of avian predation on Upper Columbia River Steelhead. Transactions of the American Fisheries Society 148:896-913.

Evans, A.F., Q. Payton, N.J. Hostetter, K. Collis, B.M. Cramer, and D.D. Roby. 2022. Cumulative effects of piscivorous colonial waterbirds on juvenile salmonids: a multi predator-prey species evaluation. PLoS ONE 17(8):e0272875.

Evans, A.F., Q. Payton, N. Banet, B.M. Cramer, C. Kelsey, and D.A. Hewitt. 2022. Avian predation on juvenile and adult Lost River and Shortnose Suckers: an updated multi-predator species evaluation. North American Journal of Fisheries Management DOI:10.1002/nafm.10838.

Hostetter, N.J., A.F. Evans, D.D. Roby, K. Collis, M. Hawbecker, B.P. Sandford, D.E. Thompson & F.J. Loge. 2011. Relationship of external fish condition to pathogen prevalence and out-migration survival in Juvenile steelhead, Transactions of the American Fisheries Society 140:1158-117.

Hostetter, N.J., A.F. Evans, D.D. Roby, and K. Collis. 2012. Susceptibility of juvenile steelhead to avian predation: the influence of individual fish characteristics and river conditions. Transactions of the American Fisheries Society 141:1586-1599.

Hostetter, N.J., A.F. Evans, F.J. Loge, R.R. O'Conner, B.M. Cramer, D. Fryer, and K. Collis. 2015. The influence of individual fish characteristics on survival and detection: similarities across two salmonid species. North American Journal of Fisheries Management 35:1034-1045.

Hostetter, N.J., A.F. Evans, B.M. Cramer, K. Collis, D.E. Lyons, and D.D. Roby. 2015. Quantifying avian predation on fish populations: Integrating predator-specific deposition probabilities in tag recovery studies. Transactions of the American Fisheries Society 144:410-422.

Hostetter, N.J., B. Gardner, A.F. Evans, B.M. Cramer, Q. Payton, K. Collis, and D.D. Roby. 2018. Wanted dead or alive: a state-space mark-recapture-recovery model incorporating multiple recovery types and state uncertainty. Canadian Journal of Fisheries and Aquatic Sciences 75:1117-1127.

Hostetter, N.J., Q. Payton, D.D. Roby, K. Collis, and A.F. Evans. 2022. Predation probabilities and functional responses: How piscivorous waterbirds respond to pulses in fish abundance. Ecosphere 13:e4220. 

Hostetter, N.J., A.F. Evans, Q. Payton, D.D. Roby, D.E. Lyons, and K. Collis. 2023. A review of factors affecting the susceptibility of juvenile salmonids to avian predation. North American Journal of Fisheries Management DOI:10.1002/nafm.10862. 

Lyons, D.E., D.D. Roby, and K. Collis. 2005. Foraging ecology of Caspian terns in the Columbia River estuary, USA. Waterbirds 28:280-291.

Lyons, D.E., D.D. Roby, and K. Collis. 2007. Foraging patterns of Caspian terns and double-crested cormorants in the Columbia River estuary. Northwest Science 81:91-103.

Lyons, E.E., and D.D. Roby. 2011. Validating growth and development of a seabird as an indicator of food availability: captive-reared Caspian tern chicks fed ad libitum and restricted diets. Journal of Field Ornithology 82:88-100.

Matthews, S.E., D.P. Craig, K. Collis, and D.D. Roby. 2003. Double-crested Cormorant (Phalacrocorax auritus). Pp. 56-58 in D.B. Marshall, M.G. Hunter, and A.L. Contreras (eds.). Birds of Oregon: A General Reference. Oregon State University Press, Corvallis, OR.

Mercer, D.M., S.M. Haig, and D.D. Roby. 2013. Phylogeography and population genetic structure of double-crested cormorants (Phalacrocorax auritus). Conservation Genetics 14:823-836.

Payton, Q., N.J. Hostetter, and A.F. Evans. 2019. Jointly estimating survival and mortality: Integrating recapture and recovery data from complex multiple predator systems. Environmental and Ecological Statistics 26:107-125.

Payton, Q., J. Fryer, T. Garrison, and A.F. Evans. 2023. Estimating cause-specific mortality and survival of juvenile fall Chinook salmon: an investigation of avian predation across large spatial scales. North American Journal of Fisheries Management DOI: 10.1002/nafm.10871.

Payton, Q., A.F. Evans, N.J. Hostetter, D.D. Roby, B. Cramer, and K. Collis. 2020. Measuring the additive effects of predation on prey survival across spatial scales. Ecological Applications 30:e02193.10.1002/eap.2193.

Peck-Richardson, A.G., D.E. Lyons, D.D. Roby, D.A. Cushing, and J.A. Lerczak. 2018. Three-dimensional foraging habitat use and niche partitioning in two sympatric seabird species, Phalacrocorax auritus and P. penicillatus. Marine Ecology Progress Series 586:251-264.

Roby, D.D., K. Collis, D.E. Lyons, D.P. Craig, J.Y. Adkins, A.M. Myers, and R.M. Suryan. 2002. Effects of colony relocation on diet and productivity of Caspian terns. Journal of Wildlife Management 66:662-673.

Roby, D.D., K. Collis, D.E. Lyons, D.P. Craig, and M. Antolos. 2003. Caspian Tern (Sterna caspia). Pp. 277-279 in D.B. Marshall, M.G. Hunter, and A.L. Contreras (eds.). Birds of Oregon: A General Reference. Oregon State University Press, Corvallis, OR.

Roby, D.D., D.E. Lyons, D.P. Craig, K. Collis, and G.H. Visser. 2003. Quantifying the effects of predators on endangered species using a bioenergetics approach: Caspian terns and juvenile salmonids in the Columbia River estuary. Canadian Journal of Zoology 81:250–265.

Roby, D.D., K. Collis, and D.E. Lyons. 2003. Conservation and management for fish-eating birds and endangered salmon. Pp. 161-165 in C.J. Ralph and T.D. Rich (eds.). Bird conservation implementation and integration in the Americas: Proceedings of the Third International Partners in Flight Conference. USDA Forest Service Gen. Tech. Rep. PSW-GTR-191.

Schniedermeyer, E., D.D. Roby, D.E. Lyons, Y. Suzuki, and K. Collis. 2020. Caspian tern response to managed reductions in nesting habitat. Wildlife Society Bulletin 44:468-479.

Sebring, S.H., M.C. Carper, R.D. Ledgerwood, B.P. Sandford, G.M. Matthews, and A.F. Evans. 2013. Relative vulnerability of PIT-tagged subyearling fall Chinook salmon to predation by Caspian terns and double-crested cormorants in the Columbia River estuary. Transactions of the American Fisheries Society 142:1321-1334. 

Suryan, R.M., D.P. Craig, D.D. Roby, N.D. Chelgren, K. Collis, W.D. Shuford, and D.E. Lyons. 2004. Redistribution and growth of the Caspian tern population in the Pacific coast region of North America, 1981-2000. Condor 106:777-790.

Suzuki, Y., D.D. Roby, D.E. Lyons, K.N. Courtot, and K. Collis. 2015. Developing non-destructive management techniques for managing conflicts between fisheries and double-crested cormorant colonies. Wildlife Society Bulletin 39:764-771.

Wright, S.K., D.D. Roby, and R.G. Anthony. 2007. Responses of California brown pelicans to disturbances at a large Oregon roost. Waterbirds 30:479-487.

Wright, S.K., D.D. Roby, and R.G. Anthony. 2012. Factors affecting the behavior of brown pelicans at a post-breeding roost. Western Birds 43:21-36.

Peer-reviewed publications from this project. Click on links to view or download documents
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