Recent expansion of marine protected areas matches with home range of grey reef sharks - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2021

Recent expansion of marine protected areas matches with home range of grey reef sharks

Résumé

Dramatic declines in reef shark populations have been documented worldwide in response to human activities. Marine Protected Areas (MPAs) offer a useful mechanism to protect these species and their roles in coral reef ecosystems. The effectiveness of MPAs notably relies on compliance together with sufficient size to encompass animal home range. Here, we measured home range of 147 grey reef sharks, Carcharhinus amblyrhynchos, using acoustic telemetry in New Caledonia. The distribution of home range was then compared to local MPA sizes. We report a home range of 12 km(2) of reef for the species with strong differences between adult males (21 km(2)), adult females (4.4 km(2)) and juveniles (6.2 km(2) for males, 2.7 km(2) for females). Whereas local historic MPA size seemed adequate to protect reef shark home range in general, these were clearly too small when considering adult males only, which is consistent with the reported failure of MPAs to protect sharks in New Caledonia. Fortunately, the recent implementation of several orders of magnitude larger MPAs in New Caledonia and abroad show that recent Indo-Pacific MPAs are now sufficiently large to protect the home ranges of this species, including males, across its geographical range. However, protection efforts are concentrated in a few regions and cannot provide adequate protection at a global scale.
Fichier principal
Vignette du fichier
s41598-021-93426-y.pdf (2.35 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03411088 , version 1 (17-11-2021)

Licence

Identifiants

Citer

Lucas Bonnin, David Mouillot, Germain Boussarie, William D. Robbins, Jeremy J. Kiszka, et al.. Recent expansion of marine protected areas matches with home range of grey reef sharks. Scientific Reports, 2021, 11 (1), pp.14221. ⟨10.1038/s41598-021-93426-y⟩. ⟨hal-03411088⟩
52 Consultations
23 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More