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<title lang=en>Using unmanned aerial vehicles (UAVs) toinvestigate shark and ray densities in a shallowcoral lagoon</title>
<creator>Kiszka, Jeremy J.</creator>
<creator>Mourier, Johann</creator>
<creator>Gastrich, Kirk</creator>
<creator>Heithaus, Michael R.</creator>
<contributor>Department of Biological Sciences [Miami] ; Florida International University (FIU)</contributor>
<contributor>Laboratoire d'Excellence CORAIL (LabEX CORAIL) ; Institut de Recherche pour le Développement (IRD) - Université des Antilles et de la Guyane (UAG) - École des hautes études en sciences sociales (EHESS) - École pratique des hautes études (EPHE) - Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) - Université de la Réunion (UR) - Université de la Polynésie Française (UPF) - Université de Nouvelle Calédonie - Institut d'écologie et environnement</contributor>
<contributor>Centre de recherches insulaires et observatoire de l'environnement (CRIOBE) ; Université de Perpignan Via Domitia (UPVD) - École pratique des hautes études (EPHE) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0171-8630</source>
<source>EISSN: 1616-1599</source>
<source>Marine Ecology Progress Series</source>
<publisher>Oldendorf/Luhe </publisher>
<identifier>hal-01416757</identifier>
<identifier>https://hal-univ-perp.archives-ouvertes.fr/hal-01416757</identifier>
<source>https://hal-univ-perp.archives-ouvertes.fr/hal-01416757</source>
<source>Marine Ecology Progress Series, Oldendorf/Luhe 2016, 560, pp.237-242. 〈10.3354/meps11945〉</source>
<identifier>DOI : 10.3354/meps11945</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.3354/meps11945</relation>
<language>en</language>
<subject lang=en>Elasmobranchs</subject>
<subject lang=en> Distribution</subject>
<subject lang=en> Abundance</subject>
<subject lang=en> Aerial surveys</subject>
<subject lang=en> Unmanned aerial drones</subject>
<subject>[SHS.ENVIR] Humanities and Social Sciences/Environmental studies</subject>
<subject>[SDE.IE] Environmental Sciences/Environmental Engineering</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Unmanned aerial vehicles (UAVs) are being increasingly used in studies of marinefauna. Here, we tested the use of a UAV (DJI Phantom II®) to assess fine-scale variation in densitiesof 2 elasmobranchs (blacktip reef sharks Carcharhinus melanopterus and pink whiprays Himanturafai) on reef systems off Moorea (French Polynesia). We flew parallel transects designed to samplereef habitats (fringing, channel and sandflat habitats) across 2 survey blocks. Block 1 included ashark and ray provisioning site with potentially higher elasmobranch densities, whereas Block 2most likely had lower densities with no provisioning activities. Across 10 survey days in July 2014,we flew 3 transects (400 m) within each survey block (n = 60 total transect passes). As expected,densities (animals ha−1) were significantly higher in Block 1 than in Block 2, particularly where provisioningactivities occur. Differences between habitats surveyed were also found. Our study providesthe first direct estimates of shark and ray densities in coral-reef ecosystems and demonstratesthat UAVs can produce important fishery-independent data for elasmobranchs, particularly inshallow-water habitats.</description>
<date>2016-11-24</date>
</dc>
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