Otolith chemical fingerprints of skipjack tuna (Katsuwonus pelamis) in the Indian Ocean: First insights into stock structure delineation
| Autor: | Audrey M. Darnaude, Pratiwi Lestari, Campbell R. Davies, David L. Dettman, Jessica H. Farley, Naiara Rodríguez-Ezpeleta, Iraide Artetxe-Arrate, Igaratza Fraile, Naomi P. Clear, Craig Proctor, Anaïs Médieu, Iñigo Krug, Francis Marsac, Asep Priatna, Christophe Pécheyran, Mohamed Ahusan, Hilario Murua |
|---|---|
| Přispěvatelé: | AZTI - Tecnalia, MARine Biodiversity Exploitation and Conservation (UMR MARBEC), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut de Recherche pour le Développement (IRD), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Skipjack tuna Composite Particles Atmospheric Science Monsoons 01 natural sciences Otolith Analytical Chemistry Isotopes Oceans Medicine and Health Sciences Marine Fish Indian Ocean Skipjack Climatology Multidisciplinary δ13C biology Physics Stable Isotopes Eukaryota [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry Chemistry Oceanography medicine.anatomical_structure Osteichthyes Inner Ear Vertebrates Physical Sciences Medicine Anatomy Research Article Atoms δ18O Fish Biology Science Marine Biology Monsoon 010603 evolutionary biology Otolithic Membrane Bodies of water [CHIM.ANAL]Chemical Sciences/Analytical chemistry medicine Fish Physiology Animals Animal Physiology 14. Life underwater Particle Physics Tuna 010604 marine biology & hydrobiology Trace element Organisms Biology and Life Sciences biology.organism_classification Vertebrate Physiology Trace Elements Marine and aquatic sciences Earth sciences Fish [CHIM.POLY]Chemical Sciences/Polymers Ears Head Zoology |
| Zdroj: | PLoS ONE PLoS ONE, Public Library of Science, 2021, 16 (3), pp.e0249327. ⟨10.1371/journal.pone.0249327⟩ PLoS ONE, 2021, 16 (3), pp.e0249327. ⟨10.1371/journal.pone.0249327⟩ Plos One (1932-6203) (Public Library of Science (PLoS)), 2021-03, Vol. 16, N. 3, P. e0249327 (18p.) PLoS ONE, Vol 16, Iss 3, p e0249327 (2021) |
| ISSN: | 1932-6203 |
| Popis: | The chemical composition of otoliths (earbones) can provide valuable information about stock structure and connectivity patterns among marine fish. For that, chemical signatures must be sufficiently distinct to allow accurate classification of an unknown fish to their area of origin. Here we have examined the suitability of otolith microchemistry as a tool to better understand the spatial dynamics of skipjack tuna (Katsuwonus pelamis), a highly valuable commercial species for which uncertainties remain regarding its stock structure in the Indian Ocean. For this aim, we have compared the early life otolith chemical composition of young-of-the-year (13C, δ18O) signatures were used, from individuals captured in 2018 and 2019. Otolith Sr:Ca, Ba:Ca, Mg:Ca and δ18O significantly differed among fish from different nurseries, but, in general, the chemical signatures of the three nursery areas largely overlapped. Multivariate analyses of otolith chemical signatures revealed low geographic separation among Central and Eastern nurseries, achieving a maximum overall random forest cross validated classification success of 51%. Cohort effect on otolith trace element signatures was also detected, indicating that variations in chemical signatures associated with seasonal changes in oceanographic conditions must be well understood, particularly for species with several reproductive peaks throughout the year. Otolith microchemistry in conjunction with other techniques (e.g., genetics, particle tracking) should be further investigated to resolve skipjack stock structure, which will ultimately contribute to the sustainable management of this stock in the Indian Ocean. |
| Databáze: | OpenAIRE |
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