Dr. Helen Bailey

Dr. Johan Schijf

Dr. Helen Bailey



Research Interests



2007-2010 National Research Council Postdoctoral Research Associate. NOAA/NMFS/SWFSC/Environmental Research Division, California, U.S.A.

2006 Postdoctoral Research Assistant. University of Aberdeen, Lighthouse Field Station, U.K.

2002-2006 Ph.D. (Biological Sciences) University of Aberdeen, U.K.

2001-2002 M.Sc. (Oceanography) University of Southampton, U.K.

1998-2001 B.A. (Biological Sciences) University of Oxford, St. Hilda's College, U.K.


Current Projects

Passive acoustic monitoring of marine mammals in the Maryland Wind Energy Area

WhaleWatch: A tool using satellite telemetry and remotely sensed environmental data to reduce anthropogenic impacts

The Lost Years: Leatherback turtle hatchling dispersal and movements

Movement behaviors of New York striped bass


Prospective Students for fall 2017 - please contact me at hbailey@umces.edu if you are interested in working on The Lost Years sea turtle project.


Recent Publications

Bailey, H. and Secor, D.H. (2016) Coastal evacuations by fish during extreme weather events. Scientific Reports, 6: 30280.

Bograd, S., Hazen, E.L., Maxwell, S.M., Leising, A.W., Bailey, H. and Brodeur, R.D. (2016) The Offshore Ecosystem. Pages 287-309 in H. Mooney and E. Zavaleta, editors. Ecosystems of California. University of California Press, Oakland, California.

Coleman, A.T., Pitchford, J.L., Bailey, H. and Solangi, M. (2016) Seasonal movements of immature Kemp’s Ridley sea turtles (Lepidochelys kempii) in the Northern Gulf of Mexico. Aquatic Conservation: Marine and Freshwater Ecosystems, doi: 10.1002/aqc.2656

Hays, G.C., Ferreira, L.C., Sequeira, A.M.M., Meekan, M.G., Duarte, C.M., Bailey, H., Bailleul, F., Bowen, W.D., Caley, M.J., Costa, D.P., Eguíluz, V.M., Fossette, S., Friedlaender, A.S., Gales, N., Gleiss, A.C., Gunn, J., Harcourt, R., Hazen, E.L., Heithaus, M.R., Heupel, M., Holland, K., Horning, M., Jonsen, I., Kooyman, G.L., Lowe, C.G., Madsen, P.T., Marsh, H., Phillips, R.A., Righton, D., Ropert-Coudert, Y., Sato, K., Shaffer, S.A., Simpfendorfer, C.A., Sims, D.W., Skomal, G., Takahashi, A., Trathan, P.N., Wikelski, M., Womble, J.N. and Thums, M. (2016) Key questions in marine megafauna movement ecology. Trends in Ecology and Evolution, 31: 463-475. 

Howell, E.A., Hoover, A., Benson, S.R., Bailey, H., Polovina, J.J., Seminoff, J.A., and Dutton, P.H. (2015) Enhancing the TurtleWatch product for leatherback sea turtles, a dynamic habitat model for ecosystem-based management. Fisheries Oceanography, 24: 57-68. 

Lewison, R., Hobday, A.J., Maxwell, S., Hazen, E. Hartog, J.R., Dunn, D.C., Briscoe, D., Fossette, S., O’Keefe, C.E., Barnes-Mauthe, M., Abecassi M., Bograd, S., Bethoney, N.D., Bailey, H., Wiley, D., Andrews S., Hazen, L., Crowder L.B. (2015) Dynamic Ocean Management: Identifying the critical ingredients of dynamic approaches to ocean resource management. BioScience, 65: 486-498.

Maxwell, S.M., Hazen, E.L. Lewison, R.L., Dunn, D.C., Bailey, H., Bograd, S.J., Briscoe, D.K., Fossette, S., Hobday, A.J., Bennett, M., Benson, S., Caldwell, M.R., Costa, D.P., Dewar, H., Eguchi, T., Hazen, L., Kohin, S., Sippel, T. and Crowder L.B. (2015) Dynamic ocean management: Defining and conceptualizing real-time management of the ocean. Marine Policy, 58: 42-50.

Patel, S.H., Morreale, S.J., Panagopoulou, A., Bailey, H., Robinson, N.J., Paladino, F.V., Margaritoulis, D. and Spotila, J.R. (2015) Changepoint analysis: a new approach for revealing animal movements and behaviors from satellite telemetry data. Ecosphere, 6: 291.

Shillinger, G.L. and Bailey H. (2015) Movements and behavior of adult and juvenile leatherback turtles. Pages 162-172 in J. R. Spotila and P. Santidrián Tomillo, editors. The Leatherback Turtle: Biology and Conservation. John Hopkins University Press, Baltimore, MD, U.S.A.

Bailey, H., Brookes, K.L. and Thompson, P.M. (2014) Assessing environmental impacts of offshore wind farms: Lessons learned and recommendations for the future. Aquatic Biosystems, 10: 8. 

Bailey, H., Hammond, P.S., Thompson, P.M. (2014) Modelling harbour seal habitat by combining data from multiple tracking systems. Journal of Experimental Marine Biology and Ecology, 450: 30-39.

Belkin, I. M., Hunt Jr., G. L., Hazen, E. L., Zamon, J.E., Schick, R., Prieto, R., Brodziak, J., Hare, J., Teo, S.L.H., Thorne, L., Munk, P., Bailey, H., Willis, J., and Zhang, W. (2014) Fronts, fish, and predators. Deep-Sea Research II 107: 1-2.

Hobday, A. J., Maxwell, S. M., Forgie, J., McDonald, J., Darby, M., Seto, K., Bailey, H., Bograd, S. J., Briscoe, D. K., Costa, D. P., Crowder, L. B., Dunn, D. C., Fossette, S., Halpin, P. N., Hartog, J. R., Hazen, E. L., Lascelles, B. G., Lewison, R. L., Poulos, G. and Powers, A. (2014) Dynamic ocean management: Integrating scientific and technological capacity with law, policy and management. Stanford Environmental Law Journal, 33: 125-165.

Irvine, L.M., Mate, B.R., Winsor, M.H., Palacios, D.M., Bograd, S.J., Costa, D.P. and Bailey, H. (2014) Spatial and temporal occurrence of blue whales off the U.S. West Coast with implications for management. PLoS ONE, 9: e102959.

Roe, J. H., Morreale, S. J., Paladino, F. V., Shillinger, G. L., Benson S. R., Eckert, S. A., Bailey, H., Santidrián Tomillo, P., Bograd, S. J., Eguchi, T., Dutton, P. H., Seminoff, J. A., Block, B. A. and Spotila, J. R. (2014) Hotspots for bycatch of endangered leatherback turtles on longlines in the Pacific Ocean. Proceedings of the Royal Society B, 281: 20132559.

Bailey, H., Corkrey, R., Cheney B. and Thompson, P.M. (2013) Analyzing temporally correlated dolphin sightings data using generalized estimating equations. Marine Mammal Science, 29: 123-141.

Brookes, K.L., Bailey, H. and Thompson, P.M. (2013) Predictions from harbor porpoise habitat association models are confirmed by long-term passive acoustic monitoring. Journal of the Acoustical Society of America, 134: 2523-2533.

Maxwell, S. M., Hazen, E. L., Bograd, S. J., Halpern, B. S., Nickel, B., Breed, G., Teutschel, N. M., Block, B., Crowder, L. B., Benson, S., Bailey, H., Kappes, M. A., Kuhn, C., Weise, M. J., Mate, B., Shaffer, S. A., Hassrick, J. L., Henry, W.,  Irvine, L. McDonald, B., Robinson, P., Simmons, S. and Costa, D. P. (2013) Pelagic predator distributions and impacts: implications for effective spatial management in the California Current. Nature Communications, 4: 2688. 

Schick, R.S., Roberts, J.J., Eckert, S.A., Halpin, P.N., Bailey, H., Chai, F., Shi, L. and Clark, J.S. (2013) Pelagic movements of Pacific Leatherback Turtles (Dermochelys coriacea) reveal the complex role of prey and ocean currents. Movement Ecology, 1: 11

Thompson, P.M., Hastie, G.D., Nedwell, J., Barham, R., Brookes, K.L., Cordes, L.S., Bailey, H. and McLean, N. (2013) Framework for assessing impacts of pile-driving noise from offshore wind farm construction on a harbour seal population. Environmental Impact Assessment Review, 43: 73-85.

Bailey, H. (2012) Impacts of wind turbine construction on marine mammals: What can be done? International Sustainable Energy Review, 2012 (1): 34-37.

Bailey, H., Benson, S.R., Shillinger, G.L., Bograd, S.J., Dutton, P.H., Eckert, S.A., Morreale, S.J., Paladino, F.V., Eguchi, T., Foley, D.G., Block, B.A., Piedra, R., Hitipeuw, C., Tapilatu, R.F. and Spotila J.R. (2012) Identification of Distinct Movement Patterns in Pacific Leatherback Turtle Populations Influenced by Ocean Conditions. Ecological Applications, 22: 735 – 747. This is featured on the front cover, which can be viewed at http://www.esajournals.org/toc/ecap/22/3.

Bailey, H., Benson, S.R., Shillinger, G.L., Bograd, S.J., Dutton, P.H., Eckert, S.A., Morreale, S.J., Paladino, F.V., Eguchi, T., Foley, D.G., Block, B.A., Piedra, R., Hitipeuw, C., Tapilatu, R.F. and Spotila J.R. (2012) Leatherback turtle movement patterns. Bulletin of the Ecological Society of America, 93: 165-169. This is featured on the front cover, which can be viewed at http://www.esajournals.org/toc/ebul/93/2.

Bailey, H., Fossette, S., Bograd, S.J., Shillinger, G.L., Swithenbank, A.M., Georges, J.Y., Gaspar, P., Strömberg, K.H.P., Paladino, F.V., Spotila, J.R., Block, B.A. and Hays, G.C. (2012) Movement Patterns for a Critically Endangered Species, the Leatherback Turtle (Dermochelys coriacea), Linked to Foraging Success and Population Status. PLoS ONE7: e36401, doi: 10.1371/journal.pone.0036401.

Blanco, G.S., Morreale, S.J., Bailey, H., Seminoff, J.A., Paladino, F.V. and Spotila, J.R. (2012) Post-nesting movements and feeding grounds of a resident East Pacific (Chelonia mydas) population from Costa Rica. Endangered Species Research, 18: 233-245.

Hazen, E.L., Maxwell, S.M., Bailey, H., Bograd, S.J., Hamann, M., Gaspar, P., Godley, B.J. and Shillinger, G.L. (2012) Ontogeny in marine tagging and tracking science: technologies and data gaps. Marine Ecology Progress Series, 457: 221-240.

Maxwell, S.M., Hazen, E.L., Morgan, L.E., Bailey, H. and Lewison, R. (2012) Finding balance in fisheries management. Science, 336: 413.

Shillinger, G.L., Bailey, H., Bograd, S.J., Hazen, E.L., Hamann, M., Gaspar, P., Godley, B.J., Wilson, R.P. and Spotila, J.R. (2012) Tagging through the stages: technical and ecological challenges in observing life histories through biologging. Marine Ecology Progress Series, 457: 165-170. 

Shillinger, G.L., Di Lorenzo, E., Luo, H., Bograd, S.J., Hazen, E.L., Bailey, H. and Spotila, J.R. (2012) On the dispersal of leatherback turtle hatchlings from Meso-American nesting beaches. Proceedings of the Royal Society B, 279: 2391-2395.

Benson, S.R., Eguchi, T., Foley, D.G., Forney, K.A., Bailey, H., Hitipeuw, C., Samber, B.P., Tapilatu, R.F., Rei, V., Ramohia, P., Pita, J., Dutton, P.H. (2011) Large-scale movements and high-use areas of western Pacific leatherback turtles, Dermochelys coriacea. Ecosphere, 2: art84 [doi: 10.1890/ES11-00053.1].

Robel, A.A., Lozier, M.S., Gary, S.F., Shillinger, G.L., Bailey, H., Bograd, S.J. (2011) Projecting uncertainty onto marine megafauna trajectories. Deep-Sea Research I, 58: 915-921.

Shillinger, G.L., Swithenbank, A.M., Bailey, H., Bograd, S.J.,Castleton, M.R., Wallace, B.P., Spotila, J.R., Paladino, F.V., Piedra, R. and Block, B.A. (2011) Vertical and horizontal habitat preferences of post-nesting leatherback turtles in the South Pacific Ocean. Marine Ecology Progress Series, 422: 275-289

Bailey H. and Thompson P. (2010) Effect of oceanographic features on fine-scale foraging movements of bottlenose dolphins. Marine Ecology Progress Series, 418: 223-233.

Bailey, H., Clay, G., Coates, E.A., Lusseau, D., Senior, B. and Thompson, P.M. (2010) Using T-PODS to assess variations in the occurrence of coastal bottlenose dolphins and harbour porpoises. Aquatic Conservation: Marine and Freshwater Ecosystems, 20: 150-158.

Bailey, H., Mate, B. R., Palacios, D.M., Irvine, L., Bograd, S.J. and Costa, D.P. (2010) Behavioural estimation of blue whale movements in the Northeast Pacific from state-space model analysis of satellite tracks. Endangered Species Research, 10: 93-106.

Bailey, H., Senior, B., Simmons, D., Rusin, J., Picken, G. and Thompson, P.M. (2010) Assessing underwater noise levels during pile-driving at an offshore windfarm and its potential effects on marine mammals. Marine Pollution Bulletin, 60: 888-897.

Howell, E.A., Dutton, P.H., Polovina, J.J., Bailey, H., Parker, D.M. and Balazs, G.H. (2010) Oceanographic influences on the dive behavior of juvenile loggerhead turtles (Caretta caretta) in the North Pacific Ocean. Marine Biology, 157: 1011-1026.

Shillinger, G.L., Swithenbank, A.M., Bograd, S.J., Bailey, H., Castleton, M.R., Wallace, B.P., Spotila, J.R., Paladino, F.V., Piedra, R. and Block, B.A. (2010) Identification of high-use internesting habitats for eastern Pacific leatherback turtles: role of the environment and implications for conservation. Endangered Species Research, 10: 215-232.

Thompson, P.M., Lusseau, D., Barton, T., Simmons, D., Rusin, J. and Bailey, H. (2010) Assessing the responses of coastal cetaceans to the construction of offshore wind turbines. Marine Pollution Bulletin, 60: 1200-1208.

Bailey, H. and Thompson, P.M. (2009) Using marine mammal habitat modelling to identify priority conservation zones within a marine protected area. Marine Ecology Progress Series, 378: 279-287.

Bailey, H., Shillinger, G., Palacios, D., Bograd, S., Spotila, J., Paladino, F. and Block B. (2008) Identifying and comparing phases of movement by leatherback turtles using state-space models. Journal of Experimental Marine Biology and Ecology, 356: 128-135.

Bograd, S., Castro, C., Di Lorenzo, E., Palacios, D., Bailey. H. and W. Gilly (2008) The shoaling of the hypoxic boundary in the California Current. Geophysical Research Letters, 35: L12607.

Shillinger, G., Palacios, D., Bailey, H., Bograd, S., Swithenbank, A., Gaspar, P., Wallace, B., Spotila, J., Paladino, F., Piedra, R., Eckert, S. and Block, B. (2008) Ocean currents shape the migration and dispersal of eastern Pacific leatherback turtles. PLoS Biology, 6: e171, doi: 10.1371/journal.pbio.0060171

Bailey H. and Thompson P. (2006) Quantitative analysis of dolphin movement patterns and their relationship with foraging. Journal of Animal Ecology, 75: 456-465.

Bailey H. and Lusseau D. (2004) Increasing the precision of theodolite tracking: modified technique to calculate the altitude of land-based observation sites. Marine Mammal Science, 20: 880-885.

Contact Dr. Bailey

Graduate Student: Aimee Hoover

Research Assistant: Jessica Wingfield



News: WhaleWatch: New project uses satellite tracking to help reduce number of whales entangled in fishing gear

News: Landmark study of leatherback turtle migration identifies Pacific danger zones for critically endangered species

News: Are offshore windfarms impacting dolphins?

Seminar at Oregon State University, Hatfield Marine Science Center: Modeling animal movements