“…Additionally, tope are considered highly migratory, and variable movement patterns of adult tope within their regional subpopulations have been described, including movements into and across oceanic waters 28 , 30 , 32 , partial migration of females between pupping and nursery grounds 31 , residency near known aggregation areas 31 , oceanic migrations between coastal areas 31 , 33 , large-scale seasonal latitudinal migrations 34 , 35 and along-coast migrations 36 . These movements of adult tope are often seasonal in nature and regularly related to their reproductive cycle 31 , 36 , or shifts in habitat conditions, such as the displacement of warm water masses 34 , 35 . With periods spent on the continental shelf and occasional excursions in deep-water, some evidence of crepuscular vertical migrations have been presented for tope in deep water areas 29 , 30 .…”