Publications

2018

Orben RA, Kokobun N, Fleishman AB, Will AP, Yamamoto T, Shaffer SA, Paredes R, Takahashi A, Kitaysky AS (2018). Persistent annual migration patterns of a specialist seabird. Marine Ecology Progress Series, 593: 231-245.
Wilkinson BP, Jahncke J, Warzybok P, Bradley RW, Shaffer SA (2018) Variable utilization of shelf break-associated habitats by chick-brooding rhinoceros auklets in the California Current System. Marine Ecology Progress Series, 590:211-226.
Taylor GT, Ackerman JT, Shaffer SA (2018) Egg turning behavior and incubation temperature in Forster’s terns in relation to mercury contamination. PLoS ONE 13(2): e0191390.

2017

2016

Thorne, L.H., Conners, M.G., Hazen, E.L., Bograd, S.J., Antolos, M., Costa, D.P., and Shaffer, S.A. (2016) Effects of El Niño-driven changes in wind patterns on North Pacific albatrosses. Journal of the Royal Society Interface, 13: 20160196 (pg. 1-13).

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.

Lascelles, B.G. Taylor, P.R., Miller, M.G.R., Dias, M.P., Oppel, S., Torres, L., Hedd, A., Le Corre, M., Phillips, R.A., Shaffer, S.A., Weimerskirch, H., and Small, C. (2016) Applying global criteria to tracking data to define important areas for marine conservation. Diversity and Distributions 22: 422-431.

2015

Kelsey, E.C., Warzybok, P., Bradley, R., Jahncke, J., and Shaffer, S.A. (2015) Environmental temperatures, artificial nests, and incubation of Cassin’s auklet. Journal of Wildlife Management, 80: 292-299

Gutowsky, S.E., Leonard, M.L., Conners, M.G., Shaffer, S.A., and Jonsen, I.D. (2015). Individual-level variation and higher-level interpretations of space use in wide-ranging species: An albatross case study of sampling effects. Frontiers in Marine Sciences, 2:93.

Orben, R.A., Paredes, R., Irons, D.B., Roby, D.D., and Shaffer, S.A. (2015) Bigger is not always better: Body size predicts individual winter foraging strategies of thick-billed murres (Uria lomvia) in the Bering Sea. Journal of Animal Ecology, 84: 1589-1599.

Thorne, L.H., Hazen, E.L., Bograd, S.J., Foley, D.G., Conners, M.G., Kappes, M.A., Kim, H.M., Tremblay, Y., Costa, D.P., and Shaffer, S.A. (2015) Sympatric North Pacific albatross species show contrasting responses to climate variability. Movement Ecology, 3: 27.

Orben, R.A., Paredes, R., Roby, D.D., Irons, D.B., and Shaffer, S.A. (2015) Flexibility and consistency: Factors influencing pelagic winter migrations of black- legged kittiwakes (Rissa tridactyla) in the subarctic North Pacific. Movement Ecology, 3: 36.

Conners, M.G., Hazen, E.L., Costa, D.P., and Shaffer, S.A. (2015) Shadowed by scale: Subtle behavioral niche partitioning revealed at the individual and species level in two sympatric, tropical, chick-brooding albatross species. Movement Ecology, 3: 28.

Osterback, A-M.K, Frechette, D.M., Hayes, S.A., Shaffer, S.A., and Moore, J.W. (2015) Anthropogenic subsidies and the shifting resource base of a generalist predator: implications for native prey. Biological Conservation, 191: 606-613.

Kappes, M.A., Shaffer, S.A., Tremblay, Y., Foley, D.G., Palacios, D.M., Bograd, S.J., and Costa, D.P. (2015) Reproductive constraints influence habitat accessibility, segregation, and preference of sympatric albatross species. Movement Ecology, 3:34.

Frechette, D.M., Osterback, A-M.K, Hayes, S.A., Moore, J.W., Shaffer, S.A., Pavelka, M., Clark Winchell, C., and Harvey, J.T. (2015) Assessing the relationship between gulls and salmon in central California using radio telemetry. North American Journal of Fisheries Management, 35: 775-788.

Thompson, D.R., Torres, L.G., Taylor, G.A., Rayner, M.J., Sagar, P.M., Shaffer, S.A., Phillips, R.A., and Bury, S.J. (2015) Stable isotope values delineate the non- breeding distributions of sooty shearwaters Puffinus griseus in the North Pacific Ocean. Marine Ecology Progress Series521: 277-282.

Young, H.S., Maxwell, S.M., Conners, M.G., and Shaffer, S.A. (2015) Pelagic marine protected areas provide effective habitat protection for multiple seabird species. Biological Conservation 181: 226-235.

Orben, R.A., Irons, D.B., Paredes, R., Roby, D.D., Phillips, R.A., and Shaffer, S.A. (2015) North or South? Niche separation of endemic red-legged kittiwakes and sympatric black-legged kittiwakes during their non-breeding migrations. Journal of Biogeography 42: 401-412.

2014

Gutowsky, S.E., Gutowsky, L.F.G., Jonsen, I.D., Leonard, M.L., Naughton, M.B., Romano, R.D., and Shaffer, S.A. (2014). Daily activity budgets reveal semi-flightless ‘reduced activity stage’ at-sea during post-breeding in Hawaiian albatrosses. Movement Ecology, 2:1-14.

Osterback, A-M.K, Frechette, D.M., Hayes, S.A., Bond, M.H., Shaffer, S.A., and Moore, J.W. (2014) Linking individual size and rearing history to survival and predation risk of threatened steelhead (Oncorhynchus mykiss). Canadian Journal of Fisheries and Aquatic Sciences, 71: 1877-1887.

Shaffer, S.A., Clatterbuck, C.A, Kelsey, E.C, Naiman, A.D., Young, L.C., VanderWerf, E.A., Warzybok, P., Bradley, R., Jahncke, J., and Bower, G.C. (2014) As the Egg Turns: Monitoring Egg Attendance Behavior in Wild Birds Using Novel Data Logging Technology. PLoS ONE, DOI: 10.1371/journal.pone.0097898.

Carey, M., Phillips, R., Silk, J., and Shaffer, S. (2014) Trans-equitorial migration of Short-tailed Shearwaters revealed by geolocators. Emu, in press.

Gutowski, S.E., Tremblay, Y., Kappes, M.S., Flint, E.N., Klavitter, J., Laniawe, L., Costa, D.P., Naughton, B.N., Romano, M.D., and Shaffer, S.A. (2014) Divergent post-breeding distribution and habitat associations of fledgling and adult Black-footed Albatrosses (Phoebastria nigripes) in the North Pacific. Ibis, 156: 60- 72.

2013

Maxwell, S.M., Hazen, E.L., Bograd, S.J., Halpern, B.S., Breed, G.A., Nickel, B., Teutschel, N.M., Crowder, L.B., Benson, S., Dutton, P.H., Bailey, H., Kappes, M.A., Kuhn, C.E., Weise, M.J., Mate, B., Shaffer, S.A., Hassrick, J.L., Henry, R.W., Irvine, L, McDonald, B.I., Robinson, P.W., Block, B.A., and Costa, D.P. (2013) Cumulative human impacts on marine predators. Nature communications, DOI: 10.1038/ncomms3688.

Frechette, D., Collins, A.L., Harvey, J.T., Hayes, S.A., Huff, D.D., Jones, A.W., Retford, N.A., Langford, A.E., Moore, J.W., Osterback, A-M.K., Satterthwaite, W.H., and Shaffer, S.A. (2013) A Bioenergetics Approach to Assessing Potential Impacts of Avian Predation on Juvenile Steelhead during Freshwater Rearing. North American Journal of Fisheries Management, 33(5), DOI: 10.1080/02755947.2013.816395.

Osterback, A-M.K., Frechette, D.M., Shelton, A.O., Hayes, S.A., Bond, M.H., Shaffer, S.A., and Moore, J.W. (2013) High predation on small populations: avian predation on imperiled salmonids. Ecosphere 3(4), art116.

2012

Hazen, E.L, Jorgensen, S., Rykaczewski, R.R., Bograd, S.J., Foley, D.G., Jonsen, I.D., Shaffer, S.A., Dunne, J.P., Costa, D.P., Crowder, L.B., and Block, B.A. (2012) Predicted habitat shifts of Pacific top predators in a changing climate. Nature Climate Change, DOI: 10.1038/NCLIMATE1686.

Frechette, D., Osterback, A-M.K., Hayes, S.A., Bond, M.H., Moore, J.W., Shaffer, S.A., and Harvey, J.T. (2012) Assessing avian predation on juvenile salmonids using passive integrated transponder tag recoveries and mark-recapture methods. North American Journal of Fisheries Management, 32(6): 1237-1250.

Rayner, M.J., Taylor, G.A., Gummer, H.D., Philips, R.A., Sagar, P.M., Shaffer, S.A., and Thompson, D.R. (2012) The breeding cycle, year-round distribution and activity patterns of the endangered Chatham Petrel (Pterodroma axillaris). Emu, 112(2): 107-116.

Winship, A.J., Jorgensen, S.J., Shaffer, S.A., Jonsen, I.D., Robinson, P.W., Costa, D.P., and Block, B.A. (2012) State-space framework for estimating measurement error from double-tagging telemetry experiments. Methods in Ecology and Evolution, 3(2): 291-302.

Costa, D.P. and Shaffer, S.A. (2012) Seabirds and marine mammals. In Metabolic Ecology (Eds. J.H. Brown, R.M. Sibly, and A. Kodric-Brown). Wiley & Sons, Ltd. In press.

2011

Block, B.A., Jonsen, I.D., Jorgensen, S.J., Winship, A.J., Shaffer, S.A., Bograd, S.J., Hazen, E.L., Foley, D.G., Breed, G.A., Harrison, A.-L., Ganong, J.E., Swithenbank, A., Castleton, M., Dewar, H., Mate, B.R., Shillinger, G.L., Schaefer, K.M., Benson, S.R., Weise, M.J., Henry, R.W. and Costa, D.P. (2011) Tracking Apex Marine Predator Movements in a Dynamic Ocean. Nature, 475: 86-90.

Žydelis, R, Lewison, R.L., Shaffer, S.A., Moore, J.E., Boustany, A.M., Roberts, J.J., Sims, M., Dunn, D.C., Best, B.D., Tremblay, Y., Kappes, M.A., Costa, D.C., Crowder, L.D. (2011) Dynamic habitat models: Using telemetry data to understand fisheries bycatch. Proceedings of the Royal Society of London B, 278: 3191- 3200.

Rayner, M.J., Lawrence, H.A., Hauber, M.E., Thompson, D.R., Sagar, P.M., Bury, S.J., Landers, T.J., Phillips, R.A., Ranjard, L., Steeves, T.E., and Shaffer, S.A. (2011) Contemporary and historical separation of non-breeding distribution between two genetically-distinct populations of a facultative transequatorial migrant. Nature Communications, DOI: 10.1038/ncomms1330

Verrier, D., Guinet, C., Authier, M., Tremblay, Y., Shaffer, S.A., Costa, D.P., Groscolas, R., Arnould, J.P.Y. (2011) The ontogeny of diving abilities in subantarctic fur seal (Arctocephalus tropicalis) pups: developmental trade-off in response to extreme fasting? Functional Ecology, doi: 10.1111/j.1365-2435.2011.01846.x.

Rayner, M., Sagar, P.M., Thompson, D.R., Taylor, G.A., Torres, L., Shaffer, S.A. (2011) Migration and diving activity in post-breeding Flesh-footed shearwaters (Puffinus carneipes). Journal of Avian Biology, 42: 266-270.

Shaffer, S.A. (2011) A review of seabird energetics using the doubly labeled water method. Comparative Biochemistry and Physiology 158, 315-322.

2010

Young, H.S., McCauley, D.J., Dirzo, R., Dunbar, R.D. and Shaffer, S.A. (2010) Niche partitioning among and within sympatric tropical seabirds revealed by stable isotope analysis. Marine Ecology Progress Series 416, 285-294.

Raymond, B., Shaffer, S.A., Sokolov, S., Woehler, E., Costa, D.P., Einoder, L., Hindell, M., Hosie, G., Pinkerton, M., Sagar, P.M., Scott, D., Smith, A., Thompson, D.R., Vertigan, C., Weimerskirch, H. (2010) Winds and prey availability determine shearwater foraging distribution in the Southern Ocean. PLoS One 5, e10960, 1-14.

Kappes, M.A., Shaffer, S.A., Tremblay, Y., Foley, D.G., Palacios, D.M., Robinson, P.W., Bograd, S.J., and Costa, D.P. (2010) Hawaiian albatrosses track interannual variability of marine habitats in the North Pacific. Progress in Oceanography 86, 246-260.

Young, H.S., Shaffer, S.A., McCauley, D.J., Foley, D.G., Dirzo, R. and Block, B.A. (2010) Resource partitioning by sympatric boobies in the Central Pacific Ocean. Marine Ecology Progress Series 403, 291-301.

2009

Young, L.C., Vanderlip, C., Duffy, D.C., Afanasyev, V. and Shaffer, S.A. (2009) Bringing home the trash: do differences in foraging lead to increased plastic ingestion in Laysan Albatrosses? PLoS One 4, e7624.

González-Solís, J. and Shaffer, S.A. (2009) Introduction and synthesis: spatial ecology of seabirds at sea. Marine Ecology Progress Series 391, 117-120.

Tremblay, Y. Sophie, B., Henry, R.W., Kappes, M.A., Costa, D.P., and Shaffer, S.A. (2009) Analytical Approaches to Investigate Seabird-Environment Interactions: a review. Marine Ecology Progress Series 391, 153-163.

Shaffer, S.A., Weimerskirch, H., Scott, D., Pinaud, D., Thompson, D.R., Sagar, P.M., Moller, H., Taylor, G.A., Foley, D.G., Tremblay, Y., and Costa, D.P. (2009) Spatio-temporal habitat use by breeding sooty shearwaters (Puffinus griseus). Marine Ecology Progress Series 391, 209-220.

Weimerskirch, H., Shaffer, S.A., Tremblay, Y., Costa, D.P., Gadenne, H., Kato, A., Ropert-Coudert, Y., Sato, K., Aurioles, D. (2009) Species and sex specific differences in foraging behaviour and foraging zones in two sympatric boobies. Marine Ecology Progress Series 391, 267-278.

Adams, J., Scott, D., McKechnie, S., Blackwell, G., Shaffer, S.A., and H. Moller (2009) Effects of geolocation archival tags on reproduction and adult body mass of Sooty Shearwater (Puffinus griseus). New Zealand Journal of Zoology 36, 355-366.

2008

Costa, D.P. and Shaffer, S.A. (2008) Physiological constraints on the foraging ecology and energetics of albatrosses and other large seabirds. 4thCPB Meeting in Africa: Mara 2008. Molecules to Migration: The pressures of life (Eds S. Morris & A. Vosloo). Medimond Publishing Co. via Maserati, 40124 Bologna Italy. Pages 497-506.

Suryan, R.M., Anderson, D.J., Shaffer, S.A., Roby, D.D., Tremblay, Y., Costa, D.P., Sato, F., and Ozaki, K. (2008) Wind, waves, and wing loading: Their relative importance to the at-sea distribution and movements of North and Central Pacific albatrosses. PLoS One 3(12): e4016. doi:10.1371/journal.pone.0004016.

Burger, A.E. and Shaffer S.A. (2008) Perspectives in Ornithology: Application of tracking and data-logging technology in research and conservation of seabirds. Auk 125(2), 253-264.

2007

Robinson, P.W., Tremblay, Y., Antolos, M., Crocker, D.E., Kuhn, C.E., Shaffer S. A., Simmons, S., and Costa, D.P. (2007) A comparison of ARGOS-tracking-based indirect measures of foraging behavior. Deep-Sea Research II 54, 356-368..

Angelier, F., Shaffer, S.A., Weimerskirch, H., Trouvé, C. and Chastel, O. (2007) Corticosterone and foraging behaviour in a pelagic seabird. Physiological and Biochemical Zoology 80, 283-292.

2006

Shaffer, S. A., Tremblay, Y., Weimerskirch, H., Scott, D., Thompson, D.R., Sagar, P.M., Moller, H., Taylor, G.A., Foley, D.G., Block, B.A., and Costa, D.P. (2006) Migratory shearwaters integrate oceanic resources across the Pacific Ocean in an endless summer. Proceedings of the National Academy of Sciences USA 103, 12799-12802.

Angelier, F., Shaffer, S.A., Weimerskirch, H., and Chastel, O. (2006) Effect of age, breeding experience and senescence on corticosterone and prolactin levels in a long-lived seabird: the wandering albatross. General and Comparative Endocrinology 149, 1-9.

Shaffer, S.A., Gabrielsen, G.W., Verreault, J. and Costa, D.P. (2006) Validation of water flux and body composition in Glaucous gulls (Larus hyperboreus). Physiological and Biochemical Zoology 79, 836-845.

Shaffer, S.A. and Costa, D.P. (2006) A database for the study of marine mammal behavior: Gap analysis, data standardization, and future directions. IEEE Journal of Oceanic Engineering 31 (1), 82-86.

Tremblay, Y., Shaffer, S.A., Fowler, S.L., Kuhn, C.E., McDonald, B.I., Weise, M.J., Bost, C.-A., Weimerskirch, H., Crocker, D.E., Goebel, M. E., Costa, D. P. (2006) Interpolation of tracking data in a fluid environment. Journal of Experimental Biology 209, 128-140.

Kuhn, C.E., McDonald, B.I., Shaffer, S.A., Costa, D.P., Barnes, J., Crocker, D.E., and Burns, J. (2006) Diving Physiology and Winter Foraging Behavior of a Juvenile Leopard Seal (Hydrurga leptonyx). Polar Biology 29, 303-307.

2005

Shaffer, S.A., Tremblay, Y., Awkerman, J., Henry, W.R., Teo, S.L.H., Anderson D.J., Croll, D.A., Block, B.A., and Costa, D.P. (2005) Comparison of light- and SST- based geolocation with satellite telemetry in free-ranging albatrosses. Marine Biology 147, 833-843.

2004

Costa, D.P., Kuhn, C.E., Weise, M.J., Shaffer, S.A., and Arnould, J.P.Y. (2004) When does physiology limit the foraging behaviour of freely diving mammals? In: Animals and Environments (Morris S. and Vosloo A. eds). Proceedings of the Third International Conference of Comparative Physiology and Biochemistry 1275C, 359-366.

Shaffer, S.A., Costa, D.P., and Weimerskirch, H. (2004) Field metabolic rates of black-browed albatrosses Thalassarche melanophrys during the incubation stage. Journal of Avian Biology 35, 551-558.

Shaffer, S.A. (2004) Annual energy budget and food requirements of breeding Wandering Albatrosses (Diomedea exulans). Polar Biology 27, 253-256.

Mabille, G., Boutard, O., Shaffer, S.A., Costa, D.P., and Weimerskirch H. (2004) Patterns of growth and energy expenditure in wandering albatross chicks. Ibis 146, 85-94.

2003

Arnould, J.P.Y., Luque, S.P., Guinet, C., Costa, D.P., Kingston, J., and Shaffer, S.A. (2003) The comparative energetics and growth strategies of sympatric Antarctic and sub Antarctic fur seal pups, at Iles Crozet. Journal of Experimental Biology 206, 4497-4506.

Shaffer, S.A., Costa, D.P., and Weimerskirch, H. (2003) Foraging effort in relation to the constraints of reproduction in free-ranging albatrosses. Functional Ecology 17, 66-74.

2002

Weimerskirch, H., Shaffer, S.A., Mabille, G., Martin, J., Boutard, O., Rouanet, J.-L. (2002) Heart rate and energy expenditure of incubating wandering albatrosses: basal levels, natural variation, and the effects of human disturbance. Journal of Experimental Biology 205(4), 475-483. (Including Cover Photo).

2001

Shaffer, S.A., Costa, D.P., and Weimerskirch, H. (2001) A comparison of methods to evaluate energy expenditure of incubating wandering albatrosses. Physiological and Biochemical Zoology 74(6), 823-831.

Shaffer, S.A., Costa, D.P., and Weimerskirch, H. (2001) Behavioural factors affecting foraging effort in breeding wandering albatrosses. Journal of Animal Ecology 70, 864-874. (Elton Prize winner).

Shaffer, S.A., Weimerskirch, H., and Costa, D.P. (2001) Functional significance of sexual dimorphism in wandering albatrosses, Diomedea exulans. Functional Ecology 15, 203-210. (Including Cover Photo).

2000

Weimerskirch, H., Guionnet, T., Martin, J., Shaffer, S.A., and Costa, D.P. (2000) Fast and fuel-efficient? Optimal use of wind by flying albatrosses. Proceedings of the Royal Society of London B 267, 1869-1874.

1997

Shaffer, S.A., Costa, D.P., Williams, T.M., and Ridgway, S.H. (1997) Diving and swimming performance of white whales, Delphinapterus leucas: An assessment of plasma lactate and blood gas levels and respiratory rates. Journal of Experimental Biology 200, 3091-3099. (Including Cover Photo).

Popular articles, reviews, technical reports

Keller, K.E., Anders, A.D., Shaffer, S.A., Kappes, M.A., Flint, B., Friedlander, A. (2009) Seabirds. Pp. 235-274. In: Friedlander, A., Keller, K.E., Wedding, L., Clarke, A., Monaco, M. (eds.). 2009. A Marine Biogeographic Assessment Of The Northwestern Hawaiian Islands. NOAA Technical Memorandum NOS NCCOS 84. Prepared by NCCOS’s Biogeography Branch in cooperation with the Office of National Marine Sanctuaries Papahanaumokuakea Marine National Monument. Silver Springs, MD. 363 pp.

Shaffer, S.A. (2008) Albatross flight performance and energetics. In Albatrosses: Their World, Their Ways (De Roy, T., Jones, M., and Fitter, J. eds). David Bateman Ltd., Aukland, New Zealand, pp. 152-153.

Shaffer, S.A. and Costa D.P. (2004) Tagging of Pacific Pelagics. In Global Procellariiform Tracking Workshop Report (ed J. P. Croxall). BirdLife International, Cambridge, page 83.

Shaffer, S.A. Costa, D. P., Suryan, R. M., Hyrenbach, K. D. (2004) North Pacific: breeding and non-breeding. In Global Procellariiform Tracking Workshop Report (ed J. P. Croxall). BirdLife International, Cambridge, pages 47-49.

Costa, D. P. and Shaffer, S. A. (2004) Marine mammal tracking database. In Global Procellariiform Tracking Workshop Report (ed J. P. Croxall). BirdLife International, Cambridge, page 92.

Shaffer, S.A. (2003) Eye of the albatross: visions of hope and survival by Carl Safina – A review. Marine Ornithology, 31: 92.

Weimerskirch H. and Shaffer, S. A. (2003) Spying on Tītī at sea – some far out results! Kia Mau Te Tītī Mo Ake Tōnu Atu Tītī Times, 12: 1-2. (Tītī is the Maori name for Sooty Shearwater).

Shaffer, S.A. (2000) Foraging ecology of Wandering Albatrosses (Diomedea exulans): Impacts on reproduction and life history. Doctoral Thesis. University of California Santa Cruz.