Spatial data gathered from literature review of Gray Whale migration. All features are downloaded and aggregated from publicly available data, or manually digitized from peer-reviewed publications.

Data sources are as follows:

Bröker, K.C., Gailey, G., Tyurneva, O.Y., Yakovlev, Y.M., Sychenko, O., Dupont, J.M., Vertyankin, V.V., Shevtsov, E. and Drozdov, K.A., 2020. Site-fidelity and spatial movements of western North Pacific gray whales on their summer range off Sakhalin, Russia. PLoS ONE, 15(8), p.e0236649.

Feyrer, L.J. and Duffus, D.A., 2015. Threshold foraging by gray whales in response to fine scale variations in mysid density. Marine Mammal Science, 31(2), pp.560-578.

Fisheries and Oceans Canada. 2013. Evaluation of proposed ecologically and biologically significant areas in marine waters of British Columbia. Canadian Science Advisory Secretariat Science Advisory Report 2012/075.

Ford, J.K., Durban, J.W., Ellis, G.M., Towers, J.R., Pilkington, J.F., Barrett‐Lennard, L.G. and Andrews, R.D., 2013. New insights into the northward migration route of gray whales between Vancouver Island, British Columbia, and southeastern Alaska. Marine Mammal Science, 29(2), pp.325-337.

Heide-Jørgensen, M. P., Laidre, K. L., Litovka, D., Villum Jensen, M., Grebmeier, J. M., and Sirenko, B. I. 2012. Identifying gray whale (Eschrichtius robustus) foraging grounds along the Chukotka Peninsula, Russia, using satellite telemetry. Polar Biology, 35, 1035–1045.

Lagerquist, B.A., Palacios, D.M., Winsor, M.H., Irvine, L.M., Follett, T.M. and Mate, B.R., 2019. Feeding home ranges of Pacific Coast Feeding Group gray whales. The Journal of Wildlife Management, 83(4), pp.925-937.

Mate, B.R. and Urban-Ramirez, J., 2003. A note on the route and speed of a gray whale on its northern migration from Mexico to central California, tracked by satellite-monitored radio tag. Journal of Cetacean Research and Management, 5(2), pp.155-157.

Mate, B.R., Ilyashenko, V.Y., Bradford, A.L., Vertyankin, V.V., Tsidulko, G.A., Rozhnov, V.V. and Irvine, L.M., 2015. Critically endangered western gray whales migrate to the eastern North Pacific. Biology Letters, 11(4), p.20150071.

Moore, S.E., Wynne, K.M., Kinney, J.C. and Grebmeier, J.M., 2007. Gray whale occurrence and forage southeast of Kodiak, Island, Alaska. Marine Mammal Science, 23(2), pp.419-428.

Oceana and Audubon Alaska 2016 - Marine Mammal Core Area Analysis. Based on ASAMM data 2000-2014. in: Smith, M. A., M. S. Goldman, E. J. Knight, and J. J. Warrenchuk (eds). 2017. Ecological Atlas of the Bering, Chukchi, and Beaufort Seas. 2nd edition. Audubon Alaska, Anchorage, AK.

Sumich, J.L. and Show, I.T., 2011. Offshore migratory corridors and aerial photogrammetric body length comparisons of southbound gray whales, Eschrichtius robustus, in the Southern California Bight, 1988–1990. Marine Fisheries Review, 73(1), pp.28-34.

Urbán-Ramirez, J., Rojas-Bracho, L., Pérez-Cortés, H., Gómez-Gallardo, A., Swartz, S.L., Ludwig, S., and Brownwell Jr., R.L., 2003. A review of gray whales (Eschrichtius robustus) on their wintering grounds in Mexican waters. Journal of Cetacean Research and Management, 5(3), pp.281-295.

Biologically Important Areas (2015):

Calambokidis, J., Steiger, G.H., Curtice, C., Harrison, J., Ferguson, M.C., Becker, E., DeAngelis, M. and Van Parijs, S.M., 2015. 4. Biologically important areas for selected cetaceans within US waters-west coast region. Aquatic Mammals, 41(1), p.39.

Clarke, J.T., Ferguson, M.C., Curtice, C. and Harrison, J., 2015. 8. Biologically Important Areas for Cetaceans Within US Waters-Arctic Region. Aquatic Mammals, 41(1), p.94.

Ferguson, M.C., Curtice, C. and Harrison, J., 2015. 6. Biologically Important Areas for Cetaceans Within US Waters-Gulf of Alaska Region. Aquatic Mammals, 41(1), p.65.

Ferguson, M.C., Waite, J.M., Curtice, C., Clarke, J.T. and Harrison, J., 2015. 7. Biologically Important Areas for Cetaceans Within US Waters-Aleutian Islands and Bering Sea Region. Aquatic Mammals, 41(1), p.79.