Forney, K. A. & Wade, P. R. Worldwide distribution and abundance of killer whales. In Whales, Whaling, and Ocean Ecosystems (eds Estes, J. A. et al.) 145–162 (University of California Press, 2006).
Reeves, R. R. & Mitchell, E. Distribution and seasonality of killer whales in the eastern Canadian Arctic. Rit Fiskideildar 11, 136–160 (1988).
Mitchell, E. & Reeves, R. R. Records of killer whales in the western North Atlantic, with emphasis on eastern Canadian waters. Rit Fiskideildar 11, 161–193 (1988).
Katona, S. K., Beard, J. A., Girton, P. E. & Wenzel, F. Killer whales (Orcinus orca) from the Bay of Fundy to the equator, including the Gulf of Mexico. Rit Fiskideildar 11, 205–224 (1988).
Higdon, J. W. & Ferguson, S. H. Sea ice declines causing punctuated change as observed with killer whale (Orcinus orca) sightings in the Hudson Bay region over the past century. Ecolog. Appl. 19, 1365–1375 (2009).
Google Scholar
Lawson, J. W. & Stevens, T. S. Historic and seasonal distribution patterns and abundance of killer whales (Orcinus orca) in the northwest Atlantic. J. Mar. Biol. Assoc. 94, 1253–1265 (2014).
Google Scholar
Jourdain, E. et al. North Atlantic killer whale Orcinus orca populations: a review of current knowledge and threats to conservation. Mammal Rev. 49, 384–400 (2019).
Google Scholar
Breed, G. A. et al. Sustained disruption of habitat use and behavior of narwhals in the presence of Arctic killer whales. Proc. Natl. Acad. Sci. U.S.A. 114, 2628–2633. https://doi.org/10.1073/pnas.1611707114 (2017).
Google Scholar
Matthews, C. J. D., Breed, G. A., Leblanc, B. & Ferguson, S. H. Killer whale presence drives bowhead whale selection for sea ice in Arctic seascapes of fear. Proc. Natl. Acad. Sci. U.S.A. 117, 6590–6598. https://doi.org/10.1073/pnas.1911761117 (2020).
Google Scholar
Matthews, C. J. D., Luque, S. L., Petersen, S. D., Andrews, R. D. & Ferguson, S. H. Satellite tracking of a killer whale (Orcinus orca) in the eastern Canadian Arctic documents ice avoidance and rapid, long-distance movement into the North Atlantic. Polar Biol. 34, 1091–1096 (2011).
Google Scholar
Lefort, K. J. et al. A review of Canadian Arctic killer whale (Orcinus orca) ecology. Can. J. Zool. 98, 245–253 (2020).
Google Scholar
Lien, J., Stenson, G. B. & Jones, P. W. Killer whales (Orcinus orca) in waters off Newfoundland and Labrador, 1978–1986. Rit Fiskideildar 11, 194–201 (1988).
Øien, N. The distribution of killer whales (Orcinus orca) in the North Atlantic based on Norwegian catches, 1938–1981, and incidental sightings, 1967–1987. Rit Fiskideildar 11, 65–78 (1988).
Reeves, R. R. & Mitchell, E. Killer whale sightings and takes by American pelagic whalers in the North Atlantic. Rit Fiskideildar 11, 7–23 (1988).
Higdon, J.W. Status of knowledge on killer whales (Orcinus orca) in the Canadian Arctic. Fisheries and Oceans Canada. Canadian Science Advisory Secretariat Research Document 2007/048 (2007)
Young, B. G., Higdon, J. W. & Ferguson, S. H. Killer whale (Orcinus orca) photo-identification in the eastern Canadian Arctic. Polar Res. 30, 7203 (2011).
Google Scholar
Matthews, C. J. D., Ghazal, M., Lefort, K. J. & Inuarak, E. Epizoic barnacles on Arctic killer whales indicate residency in warm waters. Mar. Mamm. Sci. 36, 1–5 (2020).
Google Scholar
Hobson, K. A. Tracing origins and migration of wildlife using stable isotopes: a review. Oecologia 120, 314–326 (1999).
Google Scholar
McMahon, K. W., Hamady, L. L. & Thorrold, S. R. A review of ecogeochemistry approaches to estimating movements of marine animals. Limnol. Oceanogr. 58, 697–714 (2013).
Google Scholar
Magozzi, S., Yool, A., Vander Zanden, H. B., Wunder, M. B. & Trueman, C. N. Using ocean models to predict spatial and temporal variation in marine carbon isotopes. Ecosphere 8(5), e01673 (2017).
Google Scholar
Yoshida, N. & Miyazaki, N. Oxygen isotope correlation of cetacean bone phosphate with environmental water. J. Geophys. Res. 96, 815–820 (1991).
Google Scholar
Matthews, C. J. D., Longstaffe, F. J. & Ferguson, S. H. Dentine oxygen isotopes (δ18O) as a proxy for odontocete distributions and movements. Ecol. Evol. 6, 4643–4653. https://doi.org/10.1002/ece3.2238 (2016).
Google Scholar
LeGrande, A. N. & Schmidt, G. A. Global gridded data set of the oxygen isotopic composition in seawater. Geophys. Res. Lett. 33, L12604 (2006).
Google Scholar
Hui, C. A. Seawater consumption and water flux in the common dolphin Delphinus delphis. Physiol. Zool. 54, 430–440 (1981).
Google Scholar
Andersen, S. H. & Nielsen, E. Exchange of water between the harbor porpoise, Phocoena phocoena, and the environment. Experientia 39, 52–53 (1983).
Google Scholar
Kohn, M. J. Predicting animal δ18O: accounting for diet and physiological adaptation. Geochim. Cosmochim. Acta 60, 4811–4829 (1996).
Google Scholar
Longinelli, A. Oxygen isotopes in mammal bone phosphate: A new tool for paleohydrological and paleoclimatological research?. Geochim. Cosmochim. Acta 48, 385–390 (1984).
Google Scholar
Luz, B., Kolodny, Y. & Horowitz, M. Fractionation of oxygen isotopes between mammalian bone-phosphate and environmental drinking water. Geochim. Cosmochim. Acta 48, 1689–1693 (1984).
Google Scholar
Barrick, R. E., Fisher, A. G., Kolodny, Y., Luz, B. & Bohasha, D. Cetacean bone oxygen isotopes as proxies for Miocene ocean composition and glaciation. Palaios 7, 521–531 (1992).
Google Scholar
Borrell, A. et al. Stable isotopes provide insight into population structure and segregation in eastern North Atlantic sperm whales. PLoS ONE 8, e82398 (2013).
Google Scholar
Vighi, M., Borrell, A. & Aguilar, A. Stable isotope analysis and fin whale subpopulation structure in the eastern North Atlantic. Mar. Mamm. Sci. 32, 535–551 (2015).
Google Scholar
R Core Team R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria (2020).
Matthews, C. J. D., Raverty, S. A., Noren, D. P., Arragutainaq, L. & Ferguson, S. H. Ice entrapment mortality may slow expanding presence of Arctic killer whales. Polar Biol. 42, 639–644 (2019).
Google Scholar
Goldberg, M., Kulkarni, A. B., Young, M. & Boskey, A. Dentin: structure, composition and mineralization. Front. Biosci. 3, 711–735. https://doi.org/10.2741/e281 (2011).
Google Scholar
Firsching, F. H. Precipitation of silver phosphate from homogeneous solution. Analyt. Chem. 33, 873–874 (1961).
Google Scholar
Stuart-Williams, H. & Schwarcz, H. P. Oxygen isotope analysis of silver orthophosphate using a reaction with bromine. Geochim. Cosmochim. Acta 59, 3837–3841 (1995).
Google Scholar
Flanagan, L. B. & Farquhar, G. D. Variation in the carbon and oxygen isotope composition of biomass and its relationship to water-use efficiency at the leaf- and ecosystem-scales in a northern Great Plains grassland. Plant Cell Environ. 37, 425–438 (2014).
Google Scholar
Webb, E. C., White, C. D. & Longstaffe, F. J. Investigating inherent differences in isotopic composition between human bone and enamel bioapatite: implications for reconstructing residential histories. J. Archaeol. Sci. 50, 97–107 (2014).
Google Scholar
Lécuyer, C., Amiot, R., Touzeau, A. & Trotter, J. Calibration of the phosphate δ18O thermometer with carbonate-water isotope fractionation equations. Chem. Geol. 347, 217–226 (2013).
Google Scholar
Snoeck, C. & Pellegrini, M. Comparing bioapatite carbonate pre-treatments for isotopic measurements: Part 1—Impact on structure and chemical composition. Chem. Geol. 417, 394–403 (2015).
Google Scholar
Pellegrini, M. & Snoeck, C. Comparing bioapatite carbonate pre-treatments for isotopic measurements: Part 2—Impact on carbon and oxygen isotope compositions. Chem. Geol. 420, 88–96 (2016).
Google Scholar
Sonnerup, R. E. et al. Reconstructing the oceanic 13C Suess effect. Global Biogeochem. Cycles 13, 857–872 (1999).
Google Scholar
Quay, P., Sonnerup, R., Westsby, T., Stutsman, J. & McNichol, A. Changes in the 13C/12C of dissolved inorganic carbon in the ocean as a tracer of anthropogenic CO2 uptake. Global Biogeochem. Cycles 17, 1004 (2003).
Google Scholar
Benjamini, Y. & Hochberg, Y. Controlling the false discovery rate: a practical and powerful approach to multiple testing. J. R. Stat. Soc. Ser. B 57, 289–300 (1995).
Google Scholar
Ogle, D. H., Wheeler, P. & Dinno, A. FSA: Fisheries Stock Analysis. R package version 0.8.30, https://github.com/droglenc/FSA (2020).
Maechler, M., Rousseeuw, P., Struyf, A., Hubert, M. & Hornik, K. cluster: Cluster Analysis Basics and Extensions. R package version 2.1.0 (2019).
Galili, T. dendextend: an R package for visualizing, adjusting, and comparing trees of hierarchical clustering (2015).
Spiess, A.-N. propagate: Propagation of Uncertainty. R package version 1.0–6. http://CRAN.R-project.org/package=propagate (2018).
Schmidt, G. A., Bigg, G. R. & Rohling, E. J. “Global Seawater Oxygen-18 Database – v1.21” http://data.giss.nasa.gov/o18data/ (1999).
Lee-Thorp, J. A., Sealy, J. C. & van der Merwe, N. J. Stable carbon isotope ratio differences between bone collagen and bone apatite, and their relationship to diet. J. Archaeol. Sci. 16, 585–599 (1989).
Google Scholar
Matthews, C. J. D. & Ferguson, S. H. Spatial segregation and similar trophic-level diet among eastern Canadian Arctic/north-west Atlantic killer whales inferred from bulk and compound specific isotopic analysis. J. Mar. Biol. Assoc. 94, 1343–1355 (2014).
Google Scholar
Matthews, C. J. D., Lawson, J. W. & Ferguson, S. H. Amino acid δ15N patterns consistent with killer whale ecotypes in the Arctic and Northwest Atlantic. Submitted September 2020.
Pebesma, E. J. & Bivand, R. S. Classes and methods for spatial data in R. R News 5 (2), https://cran.r-project.org/doc/Rnews/ (2005).
Bivand, R. S., Pebesma, E. & Gomez-Rubio, V. Applied spatial data analysis with R, Second edition. Springer, NY. https://asdar-book.org/ (2013).
Hijmans, R. J. raster: Geographic Data Analysis and Modeling. R package version 3.1–5. https://CRAN.R-project.org/package=raster (2020).
Pierce, D. ncdf4: Interface to Unidata netCDF (Version 4 or Earlier) Format Data Files. R package version 1.17. https://CRAN.R-project.org/package=ncdf4 (2019).
Bivand, R., Keitt, T. & Rowlingson, B. rgdal: Bindings for the ‘Geospatial’ Data Abstraction Library. R package version 1.4–8. https://CRAN.R-project.org/package=rgdal) (2019).
Ford, J. K. B. et al. Dietary specialization in two sympatric populations of killer whales (Orcinus orca) in coastal British Columbia and adjacent waters. Can. J. Zool. 76, 1456–1471 (1998).
Google Scholar
Baird, R. W. & Dill, L. M. Occurrence and behaviour of transient killer whales: seasonal and pod-specific variability, foraging behavior, and prey handling. Can. J. Zool. 73, 1300–1311 (1995).
Google Scholar
Higdon, J. W., Hauser, D. D. W. & Ferguson, S. H. Killer whales (Orcinus orca) in the Canadian Arctic: distribution, prey items, group sizes, and seasonality. Mar. Mamm. Sci. 28, E93–E109 (2011).
Google Scholar
Courtiol, A. et al. Isoscape computation and inference of spatial origins with mixed models using the R package IsoriX. In Tracking Animal Migration with Stable Isotopes 2nd edn (eds Hobson, K. A. & Wassenaar, L. I.) (Academic Press, 2019).
Tan, F. C. & Strain, P. M. The distribution of sea ice meltwater in the eastern Canadian Arctic. J. Geophys. Res. 85, 1925–1932 (1980).
Google Scholar
Tan, F. C. & Strain, P. M. Sea ice and oxygen isotopes in Foxe Basin, Hudson Bay and Hudson Strait, Canada. J. Geophys. Res. 101, 20869–20876 (1996).
Google Scholar
Bédard, P., Hillaire-Marcel, C. & Pagé, P. 18O modelling of freshwater inputs in Baffin Bay and Canadian Arctic coastal waters. Nature 293, 287–289 (1981).
Google Scholar
Bolaños-Jiménez, J. et al. Distribution, feeding habits and morphology of killer whales Orcinus orca in the Caribbean Sea. Mamm. Rev. 44, 177–189 (2014).
Google Scholar
Clementz, M. T. & Koch, P. L. Differentiating aquatic mammal habitat and foraging ecology with stable isotopes in tooth enamel. Oecologia 129, 461–472 (2001).
Google Scholar
Hobson, K. A. et al. A multi-isotope (δ13C, δ15N, δ2H) feather isoscape to assign Afrotropical migrant birds to origins. Ecosphere 3(5), 44 (2012).
Google Scholar
Bowen, G. J., Liu, Z., Vander Zanden, H. B., Zhao, L. & Takahashi, G. Geographic assignment with stable isotopes in IsoMAP. Methods Ecol. Evol. 5, 201–206 (2014).
Google Scholar
Ambrose, S. H. & Norr, L. Experimental evidence for the relationship of the carbon isotope ratios of whole diet and dietary protein to those of bone collagen and carbonate. In Prehistoric Human Bone (eds Lambert, J. B. & Grupe, G.) (Springer, 1993). https://doi.org/10.1007/978-3-662-02894-0_1.
Tieszen, L. L. & Fagre, T. Effect of diet quality and composition on the isotopic composition of respiratory CO2, bone collagen, bioapatite, and soft tissues. In Prehistoric Human Bone (eds Lambert, J. B. & Grupe, G.) (Springer, 1993). https://doi.org/10.1007/978-3-662-02894-0_5.
Myrick, A. C., Yochem, P. K. & Cornell, L. H. Toward calibrating dentinal layers in captive killer whales by use of tetracycline labels. Rit Fiskideildar 11, 285–296 (1988).
Klevezal, G. A. Layers in the hard tissues of mammals as a record of growth rhythms of individuals. Reports of the International Whaling Commission. Special Issue 3, 89–94 (1980)
Klevezal, G. A. Recording structures of mammals: determination of age and reconstruction of life history. A.A. Balkema, Rotterdam. xi + 274 p (1996)
Stern, R. A., Outridge, P. M., Davis, W. J. & Stewart, R. E. A. Reconstructing lead isotope exposure histories preserved in the growth layers of walrus teeth using the SHRIMP II ion microprobe. Environ. Sci. Technol. 33, 1771–1775 (1999).
Google Scholar
Foote, A. D. et al. Genetic differentiation among North Atlantic killer whale populations. Mol. Ecol. 20, 629–641 (2011).
Google Scholar
Lefort, K. J. The demography of Canadian Arctic killer whales. M.Sc. Thesis. University of Manitoba. 100 pp. (2020)
Foote, A. D., Newton, J., Piertney, S. B., Willerslev, E. & Gilbert, M. T. P. Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations. Mol. Ecol. 18, 5207–5217 (2009).
Google Scholar
Vennemann, T. W., Hegner, E., Cliff, G. & Benz, G. W. Isotopic composition of recent shark teeth as a proxy for environmental conditions. Geochim. Cosmochim. Acta 65, 1583–1599 (2001).
Google Scholar
Towers, J. R. et al. Movements and dive behavior of a toothfish-depredating killer and sperm whale. ICES J. Mar. Sci. 76, 298–311 (2019).
Google Scholar
Bigg, M. A., Olesiuk, P. K., Ellis, G. M., Ford, J. K. B. & Balcomb, K. C. Social organization and genealogy of resident killer whales (Orcinus orca) in the coastal waters of British Columbia and Washington State. Rep. Int. Whal. Comm. 12, 383–406 (1990).
Reisinger, R. R., Beukes, C., Hoelzel, R. A. & Nico de Bruyn, P. J. Kinship and association in a highly social apex predator population, killer whales at Marion Island. Behav. Ecol. 28, 750–759 (2017).
Google Scholar
Higdon, J. W., Westdal, K. H. & Ferguson, S. H. Distribution and abundance of killer whales (Orcinus orca) in Nunavut, Canada: an Inuit knowledge survey. J. Mar. Biol. Assoc. 94, 1293–1304 (2014).
Google Scholar
Wassmann, P., Duarte, C. M., Agustí, S. & Sejr, M. K. Footprints of climate change in the Arctic marine ecosystem. Glob. Change Biol. 17, 1235–1249 (2011).
Google Scholar
Clementz, M. T., Fordyce, R. E., Peek, S. L. & Fox, D. L. Ancient marine isoscapes and isotopic evidence of bulk-feeding by Oligocene cetaceans. Palaeogeogr. Palaeoclimatol. Palaeoecol. 400, 28–40 (2014).
Google Scholar
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