Soria Marc auteur aut IRD Heithaus M. R. auteur aut IRD Blaison A. auteur aut IRD Crochelet Estelle auteur aut IRD Forget Fabien auteur aut IRD Chabanet Pascale auteur aut IRD text journalArticle eng A sudden increase in the rates of shark attacks on humans at Reunion Island has been blamed by some on the implementation of a marine protected area (MPA) along the island's west coast, where attacks, primarily by bull sharks Carcharhinus leucas, were concentrated. We used passive acoustic telemetry to investigate the spatial distribution of bull sharks (N = 36) by quantifying their residency and their frequentation of the MPA and compared it to outside of the MPA. Over the study duration of 17 mo, 18 sharks were detected in the acoustic receiver array, most of which were detected more frequently outside the MPA (N = 148; mean +/- SD = 41.5 +/- 56.4 visits mo(-1) and 17.6 +/- 30.5 h mo(-1)) than inside the MPA (N = 218; 21.4 +/- 28.1 visits mo(-1) and 7.2 +/- 15.2 h mo(-1)). However, we found individual variation in the sharks' use of the MPA. Thirteen sharks spent more time outside the MPA than inside, while 5 sharks (all females) spent significantly more time inside the MPA. These results suggest that the spatial distribution of bull sharks is not primarily centered in the MPA along the west coast of Reunion Island, although we identified specific locations where bull shark encounter probabilities are relatively high during particular times of the year. Such higher-risk areas could be targeted as part of the risk management strategy for changes in human uses in order to reduce the risks of negative shark-human interactions observed during the past decade. specialized Bull shark Marine protected area Human-shark conflict Acoustic telemetry REUNION 034 036 630 101-113 2019 0171-8630 https://www.documentation.ird.fr/hor/PAR00020655 10.3354/meps13139 0171-8630 https://www.documentation.ird.fr/hor/PAR00020655 IRD - Base Horizon / Pleins textes 2020-05-19 2025-02-24 PAR00020655 fre