Micarelli Primo, Pireddu Marco, Persia Damiano, Sanna Marco, Vicariotto Consuelo, Pacifico Antonio, Storelli Pietro, Mahrer Makenna, Venanzi Emanuele, Reinero Francesca Romana
Sharks Studies Center-Scientific Institute, 58024 Massa Marittima, Italy.
Department of Physical Sciences, Earth and Environment, University of Siena, 53100 Siena, Italy.
Biology (Basel). 2024 Aug 26;13(9):661. doi: 10.3390/biology13090661.
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.
在2012年至2023年期间（2021年和2022年除外）每月进行约1000小时的初步水下观察后，在马达加斯加诺西贝海岸外一个名为“莫卡兰”的新兴礁石上，于15至30米深处发现并通过照片识别了23条灰礁鲨标本。经过10多年的观察，8个标本被重新 sighted（原文有误，可能是resighted），通过对第一背鳍和尾鳍部分采用非侵入性照片识别技术进行识别，并且有1个标本在首次 sighting（原文有误，可能是sighting）后1982天，即5年多后被重新识别。此外，在同一区域还识别出6条可能为怀孕雌鲨的标本。该种群完全由雌性组成。这个聚集区域可能代表一个新的育幼场所，如果经过进一步调查得到证实，将需要给予更大的保护。
