Sex- and age-specific migratory strategies of blue whales in the northeast Pacific Ocean oleh Christina Blevins, Geraldine Busquets-Vass, Geraldine Busquets-Vass, Mario A. Pardo, Diane Gendron, Jeff K. Jacobsen, Francisco Gómez-Díaz, Héctor Pérez-Puig, Christian Daniel Ortega-Ortiz, Gisela Heckel, Jorge Urbán R, Lorena Viloria-Gómora, Seth D. Newsome