Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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Professor Daniel Roby

Research Publications

  • Cushing, D.A., D.D. Roby, and D.B. Irons. In review. Patterns of distribution, abundance, and change over time in a subarctic marine bird community. Submitted to Deep-Sea Research II
  • Marcella, T.K., S.M. Gende, D.D. Roby, and A. Allignol. 2017. Disturbance of a Rare Seabird by Ship-based Tourism in a Marine Protected Area. PLoS One
  • Collar, S., D. D. Roby, and D. E. Lyons. Top-down and bottom-up interactions influence nesting success at the world's largest colony of Caspian terns (Hydroprogne caspia) in the Columbia River estuary. Abstract | 
  • Weitkamp, L.A., T.P. Good, D.E. Lyons, and D.D. Roby. The influence of environmental variation on the Columbia River estuarine fish community: Implications for predation on juvenile salmonids. Submitted to North Pacific Anadromous Fish Commission Bulletin.
  • Courtot, K. N., D. D. Roby, L. H. Kerr, D. E. Lyons, J. Y. Adkins. A Low-disturbance Capture Technique for Ground-nesting Double-crested Cormorants (Phalacrocorax auritus). Abstract | 
  • Evans, A.F., Q. Payton, A. Turecek, B. Cramer, K. Collis, D.D. Roby, P.J. Loschl, L. Sullivan, J. Skalski, M. Weiland, and C. Dotson. In review. 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. Abstract | 
  • Suzuki, Y., D.D. Roby, D.E. Lyons, K.N. Courtot, and K. Collis. 2015. Developing non-destructive techniques for managing conflicts between fisheries and double-crested cormorant colonies. Wildlife Society Bulletin 39:764-771. DOI: 10.1002/wsb.595 Abstract | 
  • Suzuki, Y., M.A. Bishop, and D.D. Roby. In review. Caspian Terns breeding in Alaska's Copper River Delta: More to come? Submitted to the Wilson Journal of Ornithology.
  • Chen, S., Z. Fan, D.D. Roby, Y. Lu, C. Chen, Q. Huang, L. Cheng, and J. Zhu. 2015. Human harvest, climate change and their synergistic effects drove the Chinese Crested Tern to the brink of extinction. Global Ecology and Conservation 4:137-145. Abstract | 
  • Hostetter, N.J., A.F. Evans, B.M. Cramer, K. Collis, D.E. Lyons, 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. Abstract | 
  • 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. Abstract | 
  • Roby, D.D. 2015. Book Review: The Double-crested Cormorant, Plight of a Feathered Pariah, by L.R. Wires. The Auk: Ornithological Advances 132:315-317.
  • Adkins, J.Y., D.D. Roby, D.E. Lyons, K.N. Courtot, K. Collis, H.R. Carter, W.D. Shuford, P.J. Capitolo. In press. Estimated Population Size, Trends, and Limiting Factors for the Double-crested Cormorant in Western North America. Journal of Wildlife Management 78:000-000.
  • Patterson, A. G. L., Kitaysky, A. S., Lyons, D. E., and Roby, D. D. In review. Nutritional stress affects corticosterone deposition in feathers of Caspian tern chicks. Journal of Avian Biology 45:000-000. doi: 10.1111/jav.00397
  • 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. doi: 10.1080/00028487.2014.901248.
  • Barbaree, B. A., S. K. Nelson, B. D. Dugger, D. D. Roby, H. R. Carter, D. L. Whitworth, and S. H. Newman. 2014. Nesting ecology of Marbled Murrelets at a remote mainland fjord in southeast Alaska. Condor: Ornithological Applications 116:173-184.
  • Paredes, R., R. A. Orben, R. M. Suryan, D. B. Irons, D. D. Roby, A. M. A. Harding, R. C. Young, K. Benoit-Bird, C. Ladd, H. Renner, S. Heppell, R. A. Phillips, and A. Kitaysky. 2014. Foraging responses of black-legged kittiwakes to prolonged food-shortages around colonies on the Bering Sea shelf. PLoS ONE 9: e92520. doi: 10.1371/journal.pone.0092520.
  • 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. doi: 10.1007/s10592-013-0477-8. Abstract |  Publisher Website | 
  • Paredes, R., A.M.A. Harding, D.B. Irons, D.D. Roby, R.M. Suryan, R.A. Orben, H. Renner, R. Young, and A. Kitaysky. 2012. Proximity to multiple foraging habitats enhances seabirds’ resilience to local food shortages. Marine Ecology Progress Series 471:253-269. Abstract | 
  • Harding, A., R. Paredes, R. Suryan, D. Roby, D. Irons, R. Orben, H. Renner, R. Young, C. Barger, and I. Dorresteijn. 2013. Does location really matter? An inter-colony comparison of seabirds breeding at varying distances from productive oceanographic features in the Bering Sea. Deep-Sea Research II 94:178-191. Abstract | 
  • 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. (S) Abstract | 
  • 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. Abstract | 
  • 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.
  • 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.
  • Evans, A.F., N.J. Hostetter, D.D. Roby, K. Collis, D.E. Lyons, B.P. Sandford, and R.D. Ledgerwood. 2012. Systemwide 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.
  • 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.
  • Wright, S. 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.
  • 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.
  • 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 at a Caspian tern colony in San Francisco Bay: A technique to evaluate impacts of avian predation on juvenile salmonids. North America Journal of Fisheries Management 31: 79-87.
  • Lyons, D.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.
  • Maranto, C.J., J.K. Parrish, D.P. Herman, A.E. Punt, J.D. Olden, M.T. Brett, and D.D. Roby. 2011. Use of fatty acid analysis to determine dispersal of Caspian terns in the Columbia River Basin, U.S.A. Conservation Biology 25: 736-746.
  • Fischer, K.N., R.M. Suryan, D.D. Roby, and G.R. Balogh. 2009. Post-breeding season distribution of black-footed and Laysan albatrosses satellite-tagged in Alaska: interspecific differences in spatial overlap with North Pacific fishers. Biological Conservation 142:752-760.
  • Fagre, D.B., C.W. Charles, C.D. Allen, C. Birkeland, F.S. Chapin III, P.M. Groffman, G.R. Gunternspergen, A.K. Knapp, A.D. McGuire, P.J. Mulholland, D.P.C. Peters, D.D. Roby, and G. Sugihara. 2009. Thresholds of climate change in ecosystems. A report by the U.S. Climate Change Science Program and the Subcommittee on Global Change Research. U.S. Geological Survey, Reston VA, USA. 170 pages.
  • Jodice, P. G. R., D. D. Roby, K. R. Turco, R. M. Suryan, D. B. Irons, J. F. Piatt, M. T. Shultz, D. G. Roseneau, A. B. Kettle. 2008. Growth rates of Black- legged Kittiwake chicks in relation to delivery rate, size and energy density of meals. Marine Ornithology 36:107-114 Publisher Website | 
  • Wright, S. K., D. D. Roby, and R. G. Anthony. 2007. Responses of California Brown Pelicans to Disturbances at a Large Oregon Roost. Waterbirds 3);479-487.
  • 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.
  • 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.
  • Romano, M. D., J. F. Piatt, and D. D. Roby. 2006. Testing the junk food hypothesis on marine birds: effects of prey type on growth and development. Waterbirds 29:407-414.
  • Jodice, P. G. R., D. D. Roby, K. R. Turco, R. M. Suryan, D. B. Irons, J. F. Piatt, M. T. Shultz, D. G. Roseneau, A. B. Kettle, and J. A. Anthony. 2006. Assessing the nutritional stress hypothesis: the relative influence of diet quantity and quality on seabird productivity. Marine Ecology Progress Series 325:267-279.
  • Sheffield, L. M., A. E. Gall, D. D. Roby, D. B. Irons, and K. M. Dugger. 2006. Monitoring planktivorous seabird populations: Validating surface counts of crevice-nesting auklets using mark-resighting. Canadian Journal of Zoology 84:846-854.
  • Gall, A. E., D. D. Roby, D. B. Irons, and I. C. Rose. 2006. Differential Response in Chick Survival to Diet in Least and Crested Auklets. Marine Ecology Progress Series 308:279-291.
  • Schreck, C. B., T. P. Stahl, L. E. Davis, D. D. Roby, and B. J. Clemens. 2006. Mortality of juvenile spring-summer Chinook salmon in the lower Columbia River and estuary, 1992-1998: Evidence for delayed mortality? Transactions of the American Fisheries Society 135:457-475.
  • Suryan, R. M., D. B. Irons, E. D. Brown, P. G. R. Jodice, and D. D. Roby. 2006. Site-specific effects on productivity of an upper trophic-level marine predator: Bottom-up, top-down, and mismatch effects on reproduction in a colonial seabird. Progress in Oceanography 68:303-328.
  • Jodice, P. G. R., D. D. Roby, R. Suryan, D. B. Irons, K. R. Turco, E. D. Brown, J. F. Thedinga, and G. H. Visser. 2006. Increased energy expenditure by a seabird in response to higher food abundance. Marine Ecology Progress Series. 306:283-293.
  • 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.
  • Roby, D. D., K. Collis, and D. E. Lyons. 2005. 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.
  • 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.
  • Rizzolo, D. J., D. Esler, D. D. Roby, and R. L. Jarvis. 2005. Do wintering Harlequin Ducks forage nocturnally at high latitudes? Condor 107:173-177.
  • 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.
  • 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.
  • Suryan, R. M., D. P. Craig, D. D. Roby, N. D. Chelgren, K. Collis, W. D. Shufford, 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.
  • 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, 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.
  • Palmer, A. G., D. L. Nordmeyer and D. D. Roby. 2004. Nestling provisioning rates of peregrine falcons in interior Alaska. Journal of Raptor Research 38:9-18.
  • Jodice, P. G. R., D. D. Roby, R. M. Suryan, D. B. Irons, A. M. Kaufman, K. R. Turco, and G. H. Visser. 2003. Variation in Energy Expenditure among Black-Legged Kittiwakes: Effects of Activity-Specific Metabolic Rates and Activity Budgets. Physiological and Biochemical Zoology 76(3):375-388.
  • Jodice, P. G. R., D. D. Roby, M. Antolos, D. E. Lyons, D. J. Rizzolo, S. K. Wright, C. D. Anderson, S. K. Anderson, S. K. Nelson, A. E. Gall, and L. Wennerberg. 2003. Review of Biology of Marine Birds by E. A. Schreiber and J. Burger (eds. ). CRC Press, Boca Raton FL. Auk 120:240-245.
  • Matthews, S. E., D. P. Craig, K. Collis, and D. D. Roby. 2003, Double-crested Cormorant Phalacrocorax auritus. Pages 56-58 in Birds of Oregon: A General Reference. D. B. Marshall, M. G. Hunter, and A. L. Contreras (eds. ). Oregon State University Press, Corvallis, OR.
  • Palmer, A. G., D. Nordmeyer, and D. D. Roby. 2003. Effects of jet aircraft overflights on parental care of peregrine falcons. Wildlife Society Bulletin 31:499-509.
  • Roby, D. D., D. E. Lyons, D. P. Craig, K. Collis, and G. H. Visser. 2003. Quantifying the effect 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. Proceedings of the Third International Partners in Flight Conference, USDA Forest Service. Gen. Tech. Rep. PSW-GTR-191.
  • Roby, D. D., K. Collis, D. E. Lyons, D. P. Craig, and M. Antolos. 2003. Caspian Tern Sterna caspia. Pages in Birds of Oregon: A General Reference. D. B. Marshall, M. G. Hunter, and A. L. Contreras (eds. ). 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.
  • Golet, G. H., P. E. Seiser, A. D. McGuire, D. D. Roby, J. B. Fischer, K. J. Kuletz, D. B. Irons, T. A. Dean, S. G. Jewett and S. H. Newman. 2002. Long-term direct and indirect effects of the "Exxon Valdez" oil spill on pigeon guillemots in Prince William Sound AK. Marine Ecology Progress Series 241:287-304.
  • Litzow, M. S., J. F. Piatt, A. K. Prichard and D. D. Roby. 2002. Response of pigeon guillemots to variable abundance of high-lipid and low-lipid prey. Oecologia 132:286-295.
  • Collis, K., D. D. Roby, D. P. Craig, S. Adamany, J. Y. 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.
  • Suryan, R. M., D. B. Irons, M. Kaufman, P. G. R. Jodice, D. D. Roby, J. Benson, and E. D. Brown. 2002. Short-term fluctuations in forage fish availability and the effect on prey selection and brood-rearing in the black-legged kittiwake. Marine Ecology Progress Series 236:273-287.
  • Jodice, P. G. R., D. D. Roby, S. A. Hatch, V. A. Gill, R. B. Lanctot, and G. H. Visser. 2002. Does food availability affect energy expenditure rates of nesting seabirds? A supplemental-feeding experiment with black-legged kittiwakes (Rissa tridactyla). Canadian Journal of Zoology 80:214-222.
  • 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.
  • Collis, K., D. D. Roby, D. P. Craig, B. A. Ryan, and R. D. Ledgerwood. 2001. Colonial waterbird predation on juvenile salmondis tagged with passive integrated transponders in the Columbia River estuary: vulnerability of different salmonid species, stocks, and rearing types. Transactions of the American Fisheries Society 130:385-396.
  • Murphy, S. M., R. J. Ritchie, D. D. Roby, D. L. Nordmeyer, and A. G. Palmer. 2001. Responses of peregrine falcons to low-level jet aircraft. Invited paper presented at the Effects of Noise on Wildlife Conference, 22-23 August, Goose Bay, Labrador. Institute for Environmental Research and Monitoring. Tern Borealis 2:34-35. Expanded Abstract.
  • Palmer, A. G., D. L. Nordmeyer, and D. D. Roby. 2001. Factors influencing nest attendance and time-activity budgets of peregrine falcons in interior Alaska. Arctic 54:105-114.
  • Jodice, P. G. R., R. B. Lanctot, V. A. Gill, D. D. Roby, and S. A. Hatch. 2000. Sexing adult black-legged kittiwakes by DNA, behavior, and morphology. Waterbirds 23:405-415.
  • Lance, B. K., and D. D. Roby. 2000. Diet and postnatal growth in red-legged and black-legged kittiwakes: an interspecies cross-fostering experiment. Auk 117:1020-1032.
  • Anthony, J. A., D. D. Roby, and K. R. Turco. 2000. Lipid content and energy density of forage fishes from the northern Gulf of Alaska. Journal of Experimental Marine Biology and Ecology 248:53-78.
  • Golet, G. H., K. J. Kuletz, D. D. Roby, and D. B. Irons. 2000. Adult prey choice affects chick growth and reproductive success of Pigeon Guillemots. Auk 117:82-91.
  • Seiser, P. E., L. K. Duffy, A. McGuire, D. D. Roby, G. H. Golet, and M. A. Litzow. 2000. Comparison of pigeon guillemot, Cepphus columba, blood parameters from oiled and unoiled areas of Alaska eight years after the Exxon Valdez oil spill. Marine Pollution Biology 40:152-164.
 

Current Staff

Federal Staff: 4

Masters Students: 12

Phd Students: 11

Post Docs: 3

University Staff: 16

5 Year Summary

Students graduated: 20

Scientific Publications: 71

Presentations: 268

 

Contact Us

Oregon Cooperative Fish and Wildlife Research Unit Corvallis, OR 97331-3803 Phone: (541) 737 - 1938 Fax: (541) 737 - 3590

Unit Leader

Daniel Roby
Dan Roby with some friends on Buldir Island, western Aleutians

Unit Leader-Wildlife
Oregon Cooperative Fish and Wildlife Research Unit
Professor of Wildlife Ecology
Department of Fisheries and Wildlife
Oregon State University

Oregon Cooperative Fish and Wildlife Research Unit Cooperators

  1. Oregon Department of Fish and Wildlife
  2. Oregon State University
  3. U.S. Fish and Wildlife Service
  4. U.S. Geological Survey
  5. Wildlife Management Institute