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Keywords = Carcharhinus amblyrhinchos

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12 pages, 3472 KB  
Article
Observations on an Aggregation of Grey Reef Sharks (Carcharhinus amblyrhynchos) in the Mozambique Channel Off the Coast of Nosy Be (Madagascar) and Tools for Photo-Identification—A New Aggregation Nursery Site?
by Primo Micarelli, Marco Pireddu, Damiano Persia, Marco Sanna, Consuelo Vicariotto, Antonio Pacifico, Pietro Storelli, Makenna Mahrer, Emanuele Venanzi and Francesca Romana Reinero
Biology 2024, 13(9), 661; https://doi.org/10.3390/biology13090661 - 26 Aug 2024
Cited by 4 | Viewed by 3388
Abstract
Following preliminary underwater observations of about 1000 h carried out monthly between 2012 and 2023 (except the years 2021 and 2022), 23 specimens of grey reef sharks were spotted and photo-identified off the coast of Nosy Be in Madagascar, on an emerging reef [...] Read more.
Following preliminary underwater observations of about 1000 h carried out monthly between 2012 and 2023 (except the years 2021 and 2022), 23 specimens of grey reef sharks were spotted and photo-identified off the coast of Nosy Be in Madagascar, on an emerging reef called “Mokarran” at a depth between 15 and 30 m. Over 10 years of observations, eight specimens were re-sighted, identified with a non-invasive photo-identification technique of part of the first dorsal and the caudal fin, and one specimen was re-identified after 1982 days from the first sighting, i.e., after more than 5 years. In addition, six specimens of probably pregnant females were also identified in the same area. The population was entirely made up of females. The aggregation area could represent a new nursery site which, if confirmed after further investigations, will require greater protection. Full article
(This article belongs to the Section Conservation Biology and Biodiversity)
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