Notwithstanding a large individual variability, there were pronounced differences in movements and space use across the species' life history. Blue sharks belonging to different life stages (nā=ā34) were tracked for periods up to 952 days during which they moved extensively (up to an estimated 28.139 km), occupying large parts of the oceanic basin. This study presents the results of a long-term electronic tagging experiment to investigate the migratory patterns of blue shark, to elucidate how these patterns change across its life history and to assess the existence of a nursery area in the central North Atlantic. These spatial patterns remain poorly understood, particularly for oceanic species such as blue shark ( Prionace glauca), despite its importance for the management and conservation of this highly migratory species. Spatial structuring and segregation by sex and size is considered to be an intrinsic attribute of shark populations.
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