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Auteur Bonnin, L.; Robbins, W.D.; Boussarie, G.; Kiszka, J.J.; Dagorn, L.; Mouillot, D.; Vigliola, L.
Titre Repeated long-range migrations of adult males in a common Indo-Pacific reef shark Type Article scientifique
Année 2019 Publication Revue Abrégée Coral Reefs
Volume Numéro Pages
Mots-Clés carcharhinus-amblyrhynchos; carcharias; fidelity; Male-biased dispersal; Migration; movements; New Caledonia; patterns; philopatry; population; Reef shark; residency; site; Telemetry; white sharks
Résumé The grey reef shark, Carcharhinus amblyrhynchos, is one of the most abundant coral reef sharks throughout the Indo-Pacific. However, this species has been critically impacted across its range, with well-documented population declines of > 90% attributed to human activities. A key knowledge gap in the successful implementation of grey reef shark conservation plans is the understanding of large-scale movement patterns, along with the associated biological and ecological drivers. To address this shortfall, we acoustically monitored 147 adult and juvenile grey reef sharks of all sexes for more than 2 yr across the New Caledonian archipelago, West Pacific. Here, we document multiple adult males undertaking return journeys of up to nearly 700 km in consecutive years. This constitutes the first evidence of repeated long-range migrations for this species. Although only a limited number of adult males were definitively tracked undertaking migrations, similar timing in changes in the detection patterns of a further 13 animals, mostly adult males, suggests this behavior may be more common than previously thought. The paucity of evidence for juvenile migrations and timing of adult movements suggest that mating is the motivation behind these migrations. Our results have important implications for management, given the potential of mature individuals to recurrently travel outside managed or protected areas. Future management of this species clearly needs to consider the importance of large-scale migratory behaviors when developing management plans.
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Langue English Langue du Résumé Titre Original
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ISSN 0722-4028 ISBN Médium
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Notes WOS:000496832900001 Approuvé pas de
Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2670
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Auteur Govinden, R.; Jauhary, R.; Filmalter, J.; Forget, F.; Soria, M.; Adam, S.; Dagorn, L.
Titre Movement Behaviour of Skipjack (Katsuwonus Pelamis) and Yellowfin (Thunnus Albacares) Tuna at Anchored Fish Aggregating Devices (FADs) in the Maldives, Investigated by Acoustic Telemetry Type Article scientifique
Année 2012 Publication Revue Abrégée Aquatic Living Resources
Volume FirstView Numéro Pages
Mots-Clés Behaviour; Fish Aggregating Devices; Indian Ocean; Passive acoustic telemetry; skipjack tuna; Yellowfin tuna
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Numéro d'Appel LL @ pixluser @ collection 193
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Auteur Gutowsky, S.E.; Tremblay, Y.; Kappes, M.A.; Flint, E.N.; Klavitter, J.; Laniawe, L.; Costa, D.P.; Naughton, M.B.; Romano, M.D.; Shaffer, S.A.
Titre Divergent post-breeding distribution and habitat associations of fledgling and adult black-footed Albatrosses Phoebastria nigripes in the North Pacific Type Article scientifique
Année 2014 Publication Revue Abrégée Ibis
Volume 156 Numéro 1 Pages 60-72
Mots-Clés dispersal; geolocators; habitat use; Juvenile; Procellariiform; satellite telemetry; seabird
Résumé Past tracking studies of marine animals have primarily targeted adults, biasing our understanding of at-sea habitat use toward older life stages. Anthropogenic threats persist throughout the at-sea ranges of all life stages and it is therefore of interest to population ecologists and managers alike to understand spatiotemporal distributions and possible niche differentiation between age-classes. In albatrosses, particularly little is known about the juvenile life stage when fledglings depart the colonies and venture to sea with no prior experience or parental guidance. We compared the dispersal of 22 fledgling Black-footed Albatross Phoebastria nigripes between 2006 and 2008 using satellite telemetry and 16 adults between 2008 and 2009 using geolocaters from Midway Atoll National Wildlife Refuge, Northwest Hawaiian Islands. Following tag deployment, all fledglings spent several days within the calm atoll waters, then travelled northward until reaching 750-900km from the colony. At this point, fledgling distributions approached the productive North Pacific Transition Zone (NPTZ). Rather than reaching the high chlorophyll a densities on the leading edge of this zone, however, fledglings remained in areas of low productivity in the subtropical gyre. In contrast, adult albatrosses from the same breeding colony did not utilize the NPTZ at this time of year but rather ranged throughout the highly productive northern periphery of the Pacific Ocean Basin among the shelf regions off Japan and the Aleutian Islands. The dichotomy in habitat use between fledglings and adults from Midway Atoll results in complete spatial segregation between age-classes and suggests ontogenetic niche separation in this species. This research fills a large knowledge gap in at-sea habitat use during a little known yet critical life stage of albatrosses, and contributes to a more comprehensive understanding of differential mortality pressure between age-classes and overall conservation status for the vulnerable Black-footed Albatross.
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ISSN 0019-1019 ISBN Médium
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Numéro d'Appel LL @ pixluser @ collection 329
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Auteur Oppel, S.; Bolton, M.; Carneiro, A.P.B.; Dias, M.P.; Green, J.A.; Masello, J.F.; Phillips, R.A.; Owen, E.; Quillfeldt, P.; Beard, A.; Bertrand, S.; Blackburn, J.; Boersma, P.D.; Borges, A.; Broderick, A.C.; Catry, P.; Cleasby, I.; Clingham, E.; Creuwels, J.; Crofts, S.; Cuthbert, R.J.; Dallmeijer, H.; Davies, D.; Davies, R.; Dilley, B.J.; Dinis, H.A.; Dossa, J.; Dunn, M.J.; Efe, M.A.; Fayet, A.L.; Figueiredo, L.; Frederico, A.P.; Gjerdrum, C.; Godley, B.J.; Granadeiro, J.P.; Guilford, T.; Hamer, K.C.; Hazin, C.; Hedd, A.; Henry, L.; Hernández-Montero, M.; Hinke, J.; Kokubun, N.; Leat, E.; Tranquilla, L.M.F.; Metzger, B.; Militão, T.; Montrond, G.; Mullié, W.; Padget, O.; Pearmain, E.J.; Pollet, I.L.; Pütz, K.; Quintana, F.; Ratcliffe, N.; Ronconi, R.A.; Ryan, P.G.; Saldanha, S.; Shoji, A.; Sim, J.; Small, C.; Soanes, L.; Takahashi, A.; Trathan, P.; Trivelpiece, W.; Veen, J.; Wakefield, E.; Weber, N.; Weber, S.; Zango, L.; Daunt, F.; Ito, M.; Harris, M.P.; Newell, M.A.; Wanless, S.; González-Solís, J.; Croxall, J.
Titre Spatial scales of marine conservation management for breeding seabirds Type Article scientifique
Année 2018 Publication Revue Abrégée Marine Policy
Volume 98 Numéro Pages 37-46
Mots-Clés Foraging range; Marine protected area; Spatial aggregation; Telemetry; Tracking; Value of information
Résumé Knowing the spatial scales at which effective management can be implemented is fundamental for conservation planning. This is especially important for mobile species, which can be exposed to threats across large areas, but the space use requirements of different species can vary to an extent that might render some management approaches inefficient. Here the space use patterns of seabirds were examined to provide guidance on whether conservation management approaches should be tailored for taxonomic groups with different movement characteristics. Seabird tracking data were synthesised from 5419 adult breeding individuals of 52 species in ten families that were collected in the Atlantic Ocean basin between 1998 and 2017. Two key aspects of spatial distribution were quantified, namely how far seabirds ranged from their colony, and to what extent individuals from the same colony used the same areas at sea. There was evidence for substantial differences in patterns of space-use among the ten studied seabird families, indicating that several alternative conservation management approaches are needed. Several species exhibited large foraging ranges and little aggregation at sea, indicating that area-based conservation solutions would have to be extremely large to adequately protect such species. The results highlight that short-ranging and aggregating species such as cormorants, auks, some penguins, and gulls would benefit from conservation approaches at relatively small spatial scales during their breeding season. However, improved regulation of fisheries, bycatch, pollution and other threats over large spatial scales will be needed for wide-ranging and dispersed species such as albatrosses, petrels, storm petrels and frigatebirds.
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ISSN 0308-597x ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2454
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Auteur Péron, C.; Gremillet, D.; Prudor, A.; Pettex, E.; Saraux, C.; Soriano-Redondo, A.; Authier, M.; Fort, J.
Titre Importance of coastal Marine Protected Areas for the conservation of pelagic seabirds: The case of Vulnerable yelkouan shearwaters in the Mediterranean Sea Type Article scientifique
Année 2013 Publication Revue Abrégée Biological Conservation
Volume 168 Numéro Pages 210-221
Mots-Clés Aerial surveys; At-sea observations; Biotelemetry; Conservation biogeography; Spatial planning; Stable isotope analysis
Résumé Marine Protected Areas (MPAs) are being established across all marine regions but their validity for the conservation of highly mobile marine vertebrates has been questioned. We tested the hypothesis that French coastal MPAs primarily designed for coastal and benthic biota are also beneficial for the conservation of a pelagic seabird, the Vulnerable yelkouan shearwater (Puffinus yelkouan), an endemic species to the Mediterranean Sea. We used a vast spectrum of electronic devices (GPS, temperature-depth-recorders, satellite transmitters and geolocators) and stable isotopic analyses to study the year-round movements and the trophic status of yelkouan shearwaters from the Hyères archipelago (France). In addition we conducted large-scale ship and aircrafts observation surveys to investigate spatio-temporal density patterns of shearwaters (genus Puffinus) in the western Mediterranean Sea. This extensive investigation permitted the first comprehensive study of the at-sea ecology of yelkouan shearwaters showing strikingly coastal habits, partial migration, unsuspected diving capabilities (max dive depth of 30 m), and a broad diet ranging from zooplankton to small pelagic fish. Importantly, 31% of yelkouan shearwaters GPS positions associated with foraging, 38% of diving positions, and 27% of resting positions were within the three French MPAs during the breeding season. These high scores confirmed by year-round distribution derived from GLS, PTTs, at-sea and aerial observations, validated our hypothesis of the major importance of coastal MPAs for the conservation of yelkouan shearwater. Our case-study is therefore a major contribution to research efforts aiming at linking the spatial ecology of highly mobile marine vertebrates with effective conservation of marine biodiversity.
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ISSN 0006-3207 ISBN Médium
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Notes The following values have no corresponding Zotero field:<br/>Author Address: CEFE-CNRS, UMR5175, 1919 route de Mende, 34293 Montpellier, France<br/>Author Address: University of Cape Town, FitzPatrick Institute, DST-NRF Centre of Excellence , Rondebosch 7701, South Africa<br/>Author Address: Université de La Rochelle,CNRS,Observatoire PELAGIS, Systèmes d’Observation pour la Conservation des Mammifères et des Oiseaux Marins, UMS 3462, Pôle Analytique, 5 allées de l’Océan, 17000 La Rochelle, France<br/>Author Address: IFREMER, (Institut Français de Recherche pour l’Exploitation de la Mer) UMR 212 EME, Sète, France<br/>Author Address: Aarhus University, Department of Bioscience, Frederiksborgvej 399, 4000 Roskilde, Denmark<br/>PB – Elsevier<br/> Approuvé pas de
Numéro d'Appel LL @ pixluser @ collection 285
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