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Large-scale movements and site fidelity of bull sharks (Carcharhinus leucas) at Reunion Island (Indian ocean)

Abstract : Two bull sharks ( Carcharhinus leucas ) were tagged in coastal waters off Reunion Island in the tropical Indian Ocean and where tracked for 174 and 139 days using both popup satellite archival tags (pSAT) and acoustic tags. Both sharks spent a majority of their time inshore (58.1% and 89.9% in the male and the female respectively). The female performed short excursions. The male alternated residence time along the coast with wide ranging movements and performed one extensive open-ocean excursion near a seamount situated at more than 200 km from the island. The differences in the residency and home range of both sharks probably reflect different patterns of foraging and mating behaviors in the male and the female. These results underline the importance of developing risk-mitigation management taking into account the movements of sharks, and of double tagging in telemetry studies that attempt to measure the degree of fidelity of a species.
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Preprints, Working Papers, ...
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https://hal.univ-reunion.fr/hal-03048389
Contributor : Estelle Crochelet <>
Submitted on : Wednesday, December 9, 2020 - 12:22:01 PM
Last modification on : Tuesday, March 30, 2021 - 12:26:18 PM

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Marc Soria, Yann Tremblay, Antonin Blaison, Fabien Forget, Estelle Crochelet, et al.. Large-scale movements and site fidelity of bull sharks (Carcharhinus leucas) at Reunion Island (Indian ocean). 2020. ⟨hal-03048389⟩

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