Título
Movements of scalloped hammerhead sharks (Sphyrna lewini) at Cocos Island, Costa Rica and between oceanic islands in the Eastern Tropical Pacific
Autor
Elena Nalesso
Colaborador
Alex Hearn (Colaborador)
Oscar Sosa-Nishizaki (Colaborador)
Todd Steiner (Colaborador)
Alex Antoniou (Colaborador)
Andrew Reid (Colaborador)
Sandra Bessudo (Colaborador)
GERMAN SOLER (Colaborador)
Abbott Peter Klimley (Colaborador)
Frida Lara Lizardi (Colaborador)
James Ketchum (Colaborador)
Randall Arauz (Colaborador)
Nivel de Acceso
Acceso Abierto
Referencia de publicación
doi: https://doi.org/10.1371/journal.pone.0213741
Materias
article, Cocos Island, human, monitoring, nonhuman, resident, shark, South America, animal, Costa Rica, environmental protection, island (geological), movement (physiology), physiology, season, shark, Animals, Conservation of Natural Resources, Costa - (SCOPUS) CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) CIENCIAS DE LA TIERRA Y DEL ESPACIO - (CTI) OCEANOGRAFÍA - (CTI) OCEANOGRAFÍA - (CTI)
Resumen o descripción
Many species of sharks form aggregations around oceanic islands, yet their levels of residency and their site specificity around these islands may vary. In some cases, the waters around oceanic islands have been designated as marine protected areas, yet the conservation value for threatened shark species will depend greatly on how much time they spend within these protected waters. Eighty-four scalloped hammerhead sharks (Sphyrna lewini Griffith & Smith), were tagged with acoustic transmitters at Cocos Island between 2005–2013. The average residence index, expressed as a proportion of days present in our receiver array at the island over the entire monitoring period, was 0.52±0.31, implying that overall the sharks are strongly associated with the island. Residency was significantly greater at Alcyone, a shallow seamount located 3.6 km offshore from the main island, than at the other sites. Timing of presence at the receiver locations was mostly during daytime hours. Although only a single individual from Cocos was detected on a region-wide array, nine hammerheads tagged at Galapagos and Malpelo travelled to Cocos. The hammerheads tagged at Cocos were more resident than those visiting from elsewhere, suggesting that the Galapagos and Malpelo populations may use Cocos as a navigational waypoint or stopover during seasonal migrations to the coastal Central and South America. Our study demonstrates the importance of oceanic islands for this species, and shows that they may form a network of hotspots in the Eastern Tropical Pacific. © 2019 Nalesso et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Editor
Even Moland, Havforskningsinstituttet, Norway
Fecha de publicación
2019
Tipo de publicación
Artículo
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Fuente
PLoS ONE, Vol.14, No.3, Pags.
Idioma
Inglés
Sugerencia de citación
Nalesso E., Hearn A., Sosa-Nishizaki O., Steiner T., Antoniou A., Reid A. 2019. Movements of scalloped hammerhead sharks (Sphyrna lewini) at Cocos Island, Costa Rica and between oceanic islands in the Eastern Tropical Pacific. PLoS ONE 14(3): e0213741. https://doi.org/10.1371/journal.pone.0213741
Repositorio Orígen
Repositorio Institucional CICESE
Descargas
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