Trophic niches of sympatric tropical tuna in the Western Indian Ocean inferred by stable isotopes and neutral fatty acids
International audience This study examined the trophic ecology of three sympatric tropical tuna species (bigeye BET, skipjack SKJ, and yellowfin YFT) sampled in the Western Indian Ocean throughout 2013. Specifically we explored inter-specific resource partitioning and ontogenetic variability using n...
Published in: | Progress in Oceanography |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2016
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Subjects: | |
Online Access: | https://hal.science/hal-01661214 https://hal.science/hal-01661214/document https://hal.science/hal-01661214/file/Sardenne-PIO-2016-manuscript-Toxalim-Toulouse_2.pdf https://doi.org/10.1016/j.pocean.2016.06.001 |
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ftunivnantes:oai:HAL:hal-01661214v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
thunnus-albacares food-web foraging ecology top predators monoene fats salmon salmo-salar yellowfin tuna mozambique channel pacific-ocean diet [SDE]Environmental Sciences |
spellingShingle |
thunnus-albacares food-web foraging ecology top predators monoene fats salmon salmo-salar yellowfin tuna mozambique channel pacific-ocean diet [SDE]Environmental Sciences Sardenne, Fany Bodin, Nathalie Chassot, Emmanuel Amiel, Aurélien Fouché, Edwin Degroote, Maxime Hollanda, Stephanie Pethybridge, Heidi Lebreton, Benoit Guillou, Gaël Ménard, Frédéric Trophic niches of sympatric tropical tuna in the Western Indian Ocean inferred by stable isotopes and neutral fatty acids |
topic_facet |
thunnus-albacares food-web foraging ecology top predators monoene fats salmon salmo-salar yellowfin tuna mozambique channel pacific-ocean diet [SDE]Environmental Sciences |
description |
International audience This study examined the trophic ecology of three sympatric tropical tuna species (bigeye BET, skipjack SKJ, and yellowfin YFT) sampled in the Western Indian Ocean throughout 2013. Specifically we explored inter-specific resource partitioning and ontogenetic variability using neutral fatty acids and stable isotope analysis of liver and muscle from small (<100 cm fork length, FL) and large (>100 cm FL) tuna collected in mixed schools at the surface by purse-seine. Both biochemical tracers were used to calculate trophic niche indices that collectively revealed high potential for resource overlap, especially among small tuna. Resource overlap appeared strongest between BET and YFT, with SKJ tissues having high carbon isotope (delta C-13) values (-17 +/- 0.3 parts per thousand), lower nitrogen isotope (delta N-15) values (11.4 +/- 0.6 parts per thousand), and higher relative proportion of poly-unsaturated fatty acids (PUFA) than the two other species, indicating a different diet. Size was found to be a strong predictor for most biochemical tracers in the three species with delta C-13, delta N-15 and total lipid content in the liver. In the larger species (YFT and BET), proportions of mono-unsaturated fatty acids typically increased with size, while quantities of PUFA decreased. In addition to ontogenetic variability, trophic markers were shown to vary between sampling area and season: higher lipid reserves and delta N-15 values, and lower delta C-13 values occurred during monsoon periods around Seychelles than in the Mozambique Channel (parted from about 1500 km). Our multi-tracer approach reveals the magnitude of potential competitive interactions in mixed tropical tuna schools at both small and large sizes and demonstrates that ontogenetic niche differentiation acts as a major factor of coexistence in tropical tuna |
author2 |
MARine Biodiversity Exploitation and Conservation (UMR MARBEC) 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) ToxAlim (ToxAlim) Institut National de la Recherche Agronomique (INRA)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Vétérinaire de Toulouse (ENVT) Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées-Ecole d'Ingénieurs de Purpan (INPT - EI Purpan) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées Prévention et promotion de la cancérogénèse par les aliments (ToxAlim-PPCA) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Recherche Agronomique (INRA)-Université Toulouse III - Paul Sabatier (UT3) Seychelles Fishing Authority (SFA) (SFA) Université des Seychelles CISRO Oceans and Atmosphere Flagship LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Sardenne, Fany Bodin, Nathalie Chassot, Emmanuel Amiel, Aurélien Fouché, Edwin Degroote, Maxime Hollanda, Stephanie Pethybridge, Heidi Lebreton, Benoit Guillou, Gaël Ménard, Frédéric |
author_facet |
Sardenne, Fany Bodin, Nathalie Chassot, Emmanuel Amiel, Aurélien Fouché, Edwin Degroote, Maxime Hollanda, Stephanie Pethybridge, Heidi Lebreton, Benoit Guillou, Gaël Ménard, Frédéric |
author_sort |
Sardenne, Fany |
title |
Trophic niches of sympatric tropical tuna in the Western Indian Ocean inferred by stable isotopes and neutral fatty acids |
title_short |
Trophic niches of sympatric tropical tuna in the Western Indian Ocean inferred by stable isotopes and neutral fatty acids |
title_full |
Trophic niches of sympatric tropical tuna in the Western Indian Ocean inferred by stable isotopes and neutral fatty acids |
title_fullStr |
Trophic niches of sympatric tropical tuna in the Western Indian Ocean inferred by stable isotopes and neutral fatty acids |
title_full_unstemmed |
Trophic niches of sympatric tropical tuna in the Western Indian Ocean inferred by stable isotopes and neutral fatty acids |
title_sort |
trophic niches of sympatric tropical tuna in the western indian ocean inferred by stable isotopes and neutral fatty acids |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-01661214 https://hal.science/hal-01661214/document https://hal.science/hal-01661214/file/Sardenne-PIO-2016-manuscript-Toxalim-Toulouse_2.pdf https://doi.org/10.1016/j.pocean.2016.06.001 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_source |
ISSN: 0079-6611 Progress in Oceanography https://hal.science/hal-01661214 Progress in Oceanography, 2016, 146, pp.75 - 88. ⟨10.1016/j.pocean.2016.06.001⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2016.06.001 hal-01661214 https://hal.science/hal-01661214 https://hal.science/hal-01661214/document https://hal.science/hal-01661214/file/Sardenne-PIO-2016-manuscript-Toxalim-Toulouse_2.pdf doi:10.1016/j.pocean.2016.06.001 IRD: fdi:010067550 PRODINRA: 375225 WOS: 000382341800005 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.pocean.2016.06.001 |
container_title |
Progress in Oceanography |
container_volume |
146 |
container_start_page |
75 |
op_container_end_page |
88 |
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1766182724588011520 |
spelling |
ftunivnantes:oai:HAL:hal-01661214v1 2023-05-15T18:10:00+02:00 Trophic niches of sympatric tropical tuna in the Western Indian Ocean inferred by stable isotopes and neutral fatty acids Sardenne, Fany Bodin, Nathalie Chassot, Emmanuel Amiel, Aurélien Fouché, Edwin Degroote, Maxime Hollanda, Stephanie Pethybridge, Heidi Lebreton, Benoit Guillou, Gaël Ménard, Frédéric MARine Biodiversity Exploitation and Conservation (UMR MARBEC) 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) ToxAlim (ToxAlim) Institut National de la Recherche Agronomique (INRA)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Vétérinaire de Toulouse (ENVT) Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées-Ecole d'Ingénieurs de Purpan (INPT - EI Purpan) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées Prévention et promotion de la cancérogénèse par les aliments (ToxAlim-PPCA) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Recherche Agronomique (INRA)-Université Toulouse III - Paul Sabatier (UT3) Seychelles Fishing Authority (SFA) (SFA) Université des Seychelles CISRO Oceans and Atmosphere Flagship LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) 2016-08 https://hal.science/hal-01661214 https://hal.science/hal-01661214/document https://hal.science/hal-01661214/file/Sardenne-PIO-2016-manuscript-Toxalim-Toulouse_2.pdf https://doi.org/10.1016/j.pocean.2016.06.001 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2016.06.001 hal-01661214 https://hal.science/hal-01661214 https://hal.science/hal-01661214/document https://hal.science/hal-01661214/file/Sardenne-PIO-2016-manuscript-Toxalim-Toulouse_2.pdf doi:10.1016/j.pocean.2016.06.001 IRD: fdi:010067550 PRODINRA: 375225 WOS: 000382341800005 http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess CC-BY-NC-ND ISSN: 0079-6611 Progress in Oceanography https://hal.science/hal-01661214 Progress in Oceanography, 2016, 146, pp.75 - 88. ⟨10.1016/j.pocean.2016.06.001⟩ thunnus-albacares food-web foraging ecology top predators monoene fats salmon salmo-salar yellowfin tuna mozambique channel pacific-ocean diet [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2016 ftunivnantes https://doi.org/10.1016/j.pocean.2016.06.001 2023-03-08T04:32:22Z International audience This study examined the trophic ecology of three sympatric tropical tuna species (bigeye BET, skipjack SKJ, and yellowfin YFT) sampled in the Western Indian Ocean throughout 2013. Specifically we explored inter-specific resource partitioning and ontogenetic variability using neutral fatty acids and stable isotope analysis of liver and muscle from small (<100 cm fork length, FL) and large (>100 cm FL) tuna collected in mixed schools at the surface by purse-seine. Both biochemical tracers were used to calculate trophic niche indices that collectively revealed high potential for resource overlap, especially among small tuna. Resource overlap appeared strongest between BET and YFT, with SKJ tissues having high carbon isotope (delta C-13) values (-17 +/- 0.3 parts per thousand), lower nitrogen isotope (delta N-15) values (11.4 +/- 0.6 parts per thousand), and higher relative proportion of poly-unsaturated fatty acids (PUFA) than the two other species, indicating a different diet. Size was found to be a strong predictor for most biochemical tracers in the three species with delta C-13, delta N-15 and total lipid content in the liver. In the larger species (YFT and BET), proportions of mono-unsaturated fatty acids typically increased with size, while quantities of PUFA decreased. In addition to ontogenetic variability, trophic markers were shown to vary between sampling area and season: higher lipid reserves and delta N-15 values, and lower delta C-13 values occurred during monsoon periods around Seychelles than in the Mozambique Channel (parted from about 1500 km). Our multi-tracer approach reveals the magnitude of potential competitive interactions in mixed tropical tuna schools at both small and large sizes and demonstrates that ontogenetic niche differentiation acts as a major factor of coexistence in tropical tuna Article in Journal/Newspaper Salmo salar Université de Nantes: HAL-UNIV-NANTES Indian Pacific Progress in Oceanography 146 75 88 |