Diet consistency but large-scale isotopic variations in a deep-sea shark: The case of the velvet belly lantern shark, Etmopterus spinax, in the northeastern Atlantic region and Mediterranean Sea
International audience Deep-sea elasmobranchs are commonly reported as bycatch of deep-sea fisheries and their subsequent loss has been highlighted as a long-running concern to the ecosystem ecological functioning. To understand the possible consequences of their removal, information on basic ecolog...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Main Authors: | , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
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Subjects: | |
Online Access: | https://hal.univ-brest.fr/hal-03602389 https://doi.org/10.1016/j.dsr.2022.103708 |
id |
ftunivnantes:oai:HAL:hal-03602389v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Benthopelagic predator Food webs Mesopredator Stable isotopes Stomach content Trophic ecology [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition [SDV]Life Sciences [q-bio] [SDE]Environmental Sciences |
spellingShingle |
Benthopelagic predator Food webs Mesopredator Stable isotopes Stomach content Trophic ecology [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition [SDV]Life Sciences [q-bio] [SDE]Environmental Sciences Besnard, Lucien Duchatelet, Laurent Bird, Christopher Le Croizier, Gaël Michel, Loïc Pinte, Nicolas Lepoint, Gilles Schaal, Gauthier Vieira, Rui Gonçalves, Jorge M.S. Martin, Ulrich Mallefet, Jérôme Diet consistency but large-scale isotopic variations in a deep-sea shark: The case of the velvet belly lantern shark, Etmopterus spinax, in the northeastern Atlantic region and Mediterranean Sea |
topic_facet |
Benthopelagic predator Food webs Mesopredator Stable isotopes Stomach content Trophic ecology [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition [SDV]Life Sciences [q-bio] [SDE]Environmental Sciences |
description |
International audience Deep-sea elasmobranchs are commonly reported as bycatch of deep-sea fisheries and their subsequent loss has been highlighted as a long-running concern to the ecosystem ecological functioning. To understand the possible consequences of their removal, information on basic ecological traits, such as diet and foraging strategies, is needed. Such aspects have been widely studied through stomach content analysis but the lack of long-term dietary information requires other tools to be used such as stable isotopes. This study examines nitrogen and carbon isotope compositions of the velvet belly lantern shark, Etmopterus spinax, one of the most impacted shark species in northeastern Atlantic fisheries as a result of accidental catches. E. spinax was sampled at four different locations, characterized by contrasting oceanographic and ecological conditions: the western Mediterranean Sea (near the Balearic Islands), the southern Iberian upwelling system, Rockall Trough and southwestern Norwegian fjords. Stomach content analysis revealed similar prey species among sites, with a diet dominated by Euphausiacea (mostly Meganyctiphanes norvegica) and an ontogenetic shift towards small teleost fishes, cephalopods or other crustaceans. Despite these similarities, muscle stable isotope compositions differed across sampled locations. Rather than clear dietary differences, the contrasted isotopic values are likely to reflect differences in environmental settings and biogeochemical processes affecting nutrient dynamics at the base of the food webs. |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Centre for Environment, Fisheries and Aquaculture Science Lowestoft (CEFAS) Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) Biologie et Ecologie des Ecosystèmes Marins Profonds (BEEP) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) |
format |
Article in Journal/Newspaper |
author |
Besnard, Lucien Duchatelet, Laurent Bird, Christopher Le Croizier, Gaël Michel, Loïc Pinte, Nicolas Lepoint, Gilles Schaal, Gauthier Vieira, Rui Gonçalves, Jorge M.S. Martin, Ulrich Mallefet, Jérôme |
author_facet |
Besnard, Lucien Duchatelet, Laurent Bird, Christopher Le Croizier, Gaël Michel, Loïc Pinte, Nicolas Lepoint, Gilles Schaal, Gauthier Vieira, Rui Gonçalves, Jorge M.S. Martin, Ulrich Mallefet, Jérôme |
author_sort |
Besnard, Lucien |
title |
Diet consistency but large-scale isotopic variations in a deep-sea shark: The case of the velvet belly lantern shark, Etmopterus spinax, in the northeastern Atlantic region and Mediterranean Sea |
title_short |
Diet consistency but large-scale isotopic variations in a deep-sea shark: The case of the velvet belly lantern shark, Etmopterus spinax, in the northeastern Atlantic region and Mediterranean Sea |
title_full |
Diet consistency but large-scale isotopic variations in a deep-sea shark: The case of the velvet belly lantern shark, Etmopterus spinax, in the northeastern Atlantic region and Mediterranean Sea |
title_fullStr |
Diet consistency but large-scale isotopic variations in a deep-sea shark: The case of the velvet belly lantern shark, Etmopterus spinax, in the northeastern Atlantic region and Mediterranean Sea |
title_full_unstemmed |
Diet consistency but large-scale isotopic variations in a deep-sea shark: The case of the velvet belly lantern shark, Etmopterus spinax, in the northeastern Atlantic region and Mediterranean Sea |
title_sort |
diet consistency but large-scale isotopic variations in a deep-sea shark: the case of the velvet belly lantern shark, etmopterus spinax, in the northeastern atlantic region and mediterranean sea |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.univ-brest.fr/hal-03602389 https://doi.org/10.1016/j.dsr.2022.103708 |
long_lat |
ENVELOPE(-15.036,-15.036,53.825,53.825) |
geographic |
Rockall Trough |
geographic_facet |
Rockall Trough |
genre |
Meganyctiphanes norvegica |
genre_facet |
Meganyctiphanes norvegica |
op_source |
ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers https://hal.univ-brest.fr/hal-03602389 Deep Sea Research Part I: Oceanographic Research Papers, 2022, 182, pp.103708. ⟨10.1016/j.dsr.2022.103708⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2022.103708 hal-03602389 https://hal.univ-brest.fr/hal-03602389 doi:10.1016/j.dsr.2022.103708 |
op_doi |
https://doi.org/10.1016/j.dsr.2022.103708 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
182 |
container_start_page |
103708 |
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1766067369051947008 |
spelling |
ftunivnantes:oai:HAL:hal-03602389v1 2023-05-15T17:10:43+02:00 Diet consistency but large-scale isotopic variations in a deep-sea shark: The case of the velvet belly lantern shark, Etmopterus spinax, in the northeastern Atlantic region and Mediterranean Sea Besnard, Lucien Duchatelet, Laurent Bird, Christopher Le Croizier, Gaël Michel, Loïc Pinte, Nicolas Lepoint, Gilles Schaal, Gauthier Vieira, Rui Gonçalves, Jorge M.S. Martin, Ulrich Mallefet, Jérôme Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Centre for Environment, Fisheries and Aquaculture Science Lowestoft (CEFAS) Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) Biologie et Ecologie des Ecosystèmes Marins Profonds (BEEP) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) 2022-04 https://hal.univ-brest.fr/hal-03602389 https://doi.org/10.1016/j.dsr.2022.103708 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2022.103708 hal-03602389 https://hal.univ-brest.fr/hal-03602389 doi:10.1016/j.dsr.2022.103708 ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers https://hal.univ-brest.fr/hal-03602389 Deep Sea Research Part I: Oceanographic Research Papers, 2022, 182, pp.103708. ⟨10.1016/j.dsr.2022.103708⟩ Benthopelagic predator Food webs Mesopredator Stable isotopes Stomach content Trophic ecology [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition [SDV]Life Sciences [q-bio] [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.1016/j.dsr.2022.103708 2023-02-22T02:11:46Z International audience Deep-sea elasmobranchs are commonly reported as bycatch of deep-sea fisheries and their subsequent loss has been highlighted as a long-running concern to the ecosystem ecological functioning. To understand the possible consequences of their removal, information on basic ecological traits, such as diet and foraging strategies, is needed. Such aspects have been widely studied through stomach content analysis but the lack of long-term dietary information requires other tools to be used such as stable isotopes. This study examines nitrogen and carbon isotope compositions of the velvet belly lantern shark, Etmopterus spinax, one of the most impacted shark species in northeastern Atlantic fisheries as a result of accidental catches. E. spinax was sampled at four different locations, characterized by contrasting oceanographic and ecological conditions: the western Mediterranean Sea (near the Balearic Islands), the southern Iberian upwelling system, Rockall Trough and southwestern Norwegian fjords. Stomach content analysis revealed similar prey species among sites, with a diet dominated by Euphausiacea (mostly Meganyctiphanes norvegica) and an ontogenetic shift towards small teleost fishes, cephalopods or other crustaceans. Despite these similarities, muscle stable isotope compositions differed across sampled locations. Rather than clear dietary differences, the contrasted isotopic values are likely to reflect differences in environmental settings and biogeochemical processes affecting nutrient dynamics at the base of the food webs. Article in Journal/Newspaper Meganyctiphanes norvegica Université de Nantes: HAL-UNIV-NANTES Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) Deep Sea Research Part I: Oceanographic Research Papers 182 103708 |