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Publications

Our team has contributed to nearly 50 peer-reviewed scientific publications

2017

Hostetter N.J., B. Gardner, A.F. Evans, B.M. Cramer, Q. Payton, K. Collis, and D.D. Roby. In press. 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.

2016

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. 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.

2015

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.

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 DOI:10.1002/wsb.595.

2014

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.

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. The Journal of Wildlife Management DOI:10.1002/jwmg.737.

2013

Sebring, S.H., M.C. Carper, R.D. Ledgerwood, B.P. Sandford, G.M. Mathews, 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 American Fisheries Society 142:1321-1334.

Mercer, D.M., S.M. Haig, and D.D. Roby. 2013. Phylogeography and population genetic structure of double-crested cormorants (Phalacrocorax auritus). Conservation Genetics DOI:10.1007/s10592-013-0477-8.

2012

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.

Collis, K., D.D. Roby, K.W. Larson, L.J. Adrean, K. Nelson, A.F. Evans, D. Battaglia, D.E. Lyons, T. 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.

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.

Evans, A.F., N.J. Hostetter, D.D. Roby, K. Collis, D.E. Lyons, B.P. Sandford, R.D. Ledgerwood, and S. Sebring. 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.

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

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.

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.

2011

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.

Hostetter, N.J., A.F. Evans, D.D. Roby, K. Collis, M. Hawbecker, B.P. Sandford, D.E. Thompson, and 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 140:1158-1171.

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.

<2010

Evans, A.F., R.H. Werthheimer, M.L. Keefer, C.T. Boggs, C.A. Perry, and K. Collis. 2008. Transportation of steelhead kelts to increase iteroparity in the Columbia and Snake rivers. North American Journal of Fisheries Management 28:1818-1827.

Keefer, M.L., R.H. Wertheimer, A.F. Evans, C.T. Boggs, and C.A. Peery. 2008. Iteroparity in Columbia River summer-run steelhead (Oncorhynchus mykiss): Implications for management. Canadian Journal of Fisheries and Aquatic Sciences 65:2592-2605.

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.

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.

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, 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.

Wertheimer, R.H, and A.F. Evans. 2005. Downstream passage of steelhead kelts through hydroelectric dams on the lower Snake and Columbia rivers. Transactions of American Fisheries Society 134:853-865.

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

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.

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.

Evans, A.F., M.S. Fitzpatrick, and L.K. Siddens. 2004. Use of ultrasound imaging and steroid concentrations to identify maturational status in adult steelhead. North American Journal of Fisheries Management 24:967-978.

Evans, A.F., R.E. Beaty, M.S. Fitzpatrick, and K. Collis. 2004. Identification and enumeration of steelhead kelts at a Snake River hydroelectric dam. Transactions of the American Fisheries Society 133:1089-1099.

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.

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.

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.

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.

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, 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.

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.

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, 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.

Backman, T.W. and A.F. Evans. 2002. Gas bubble trauma incidence in adult salmonids in the Columbia River Basin. North American Journal of Fisheries Management 22:579-584.

Backman, T.W., A.F. Evans, M.S. Robertson, and M.A. Hawbecker. 2002. Gas bubble trauma incidence in juvenile salmonids in the Lower Columbia and Snake rivers. North American Journal of Fisheries Management 22:965-972.

Roby, D.D., K. Collis, D.E. Lyons, D.P. Craig, J. 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.

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.

Davies, M.T. and A.F. Evans. 1996. The possible significance of egg size on post-hatched growth of rainbow trout (Oncorhynchus mykiss). Proceedings of the Aquaculture Association of Africa 5:137-143.

Collis, K., R. Beaty, and B.R. Crain. 1995. Changes in catch rate and diet of northern squawfish associated with the release of hatchery-reared juvenile salmonids in a Columbia River reservoir. North American Journal of Fisheries Management 15:346-357. ​