Trophic ecology of European sardine Sardina pilchardus and European anchovy Engraulis encrasicolus in the Bay of Biscay (north-east Atlantic) inferred from δ13C and δ15N values of fish and identified mesozooplanktonic organisms
International audience European sardine (Sardina pilchardus) and European anchovy (Engraulis encrasicolus) are two species of economical and ecological significance in the Bay of Biscay (north-east Atlantic). However, the trophic ecology of both species is still poorly known in the area, and more ge...
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ftunivnantes:oai:HAL:hal-00903728v2 2023-05-15T17:38:25+02:00 Trophic ecology of European sardine Sardina pilchardus and European anchovy Engraulis encrasicolus in the Bay of Biscay (north-east Atlantic) inferred from δ13C and δ15N values of fish and identified mesozooplanktonic organisms Chouvelon, Tiphaine Chappuis, Alexis Bustamante, Paco Lefebvre, Sébastien Mornet, Françoise Guillou, Gaël Violamer, Laurie Dupuy, Christine LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Laboratoire Ressources Halieutiques (LRH) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) 2014-01-06 https://hal.science/hal-00903728 https://hal.science/hal-00903728v2/document https://hal.science/hal-00903728v2/file/Chouvelon_et_al_2014_JSR.pdf en eng HAL CCSD Elsevier hal-00903728 https://hal.science/hal-00903728 https://hal.science/hal-00903728v2/document https://hal.science/hal-00903728v2/file/Chouvelon_et_al_2014_JSR.pdf info:eu-repo/semantics/OpenAccess ISSN: 1385-1101 EISSN: 1873-1414 Journal of Sea Research (JSR) https://hal.science/hal-00903728 Journal of Sea Research (JSR), 2014, 85, pp.277-291 plankton preservation plankton delipidation pelagic fish trophic interactions spatial variability isotopic mixing model [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology info:eu-repo/semantics/article Journal articles 2014 ftunivnantes 2023-03-08T07:43:38Z International audience European sardine (Sardina pilchardus) and European anchovy (Engraulis encrasicolus) are two species of economical and ecological significance in the Bay of Biscay (north-east Atlantic). However, the trophic ecology of both species is still poorly known in the area, and more generally, few studies have considered the potential trophic overlap between sardines and anchovies worldwide. This study aims to highlight the trophic links between the mesozooplankton and adults of these two pelagic fish in the Bay of Biscay, through carbon and nitrogen stable isotopes analysis (SIA). Mesozooplankton and individuals of sardines and anchovies were collected during one season (spring 2010), over spatially contrasted stations within the study area. First, the potential effect of preservation (ethanol vs. freezing) and of delipidation (by cyclohexane) on mesozooplankton δ13C and δ15N values was assessed. Results demonstrated the necessity to correct for the preservation effect and for lipid contents in mesozooplankton for further analyses of sardines' and anchovies' diet through SIA. Next, this study highlighted the interest of working on identified mesozooplanktonic organisms instead of undetermined assemblages when unravelling food sources of planktivorous fish using stable isotopes. The inter-specific variability of isotope values within a planktonic assemblage was effectively high, probably depending on the various feeding behaviours that can occur among mesozooplankton species. Intra-specific variability was also significant and related to the spatial variations of baseline signatures in the area. To investigate the foraging areas and potential diet overlap of S. pilchardus and E. encrasicolus, mixing models (SIAR) were applied. Both fish species appeared to feed mainly in the neritic waters of the Bay of Biscay in spring and to select mainly small- to medium-sized copepods (e.g. Acartia sp., Temora sp.). However, E. encrasicolus showed a greater trophic plasticity by foraging more offshore and on ... Article in Journal/Newspaper North East Atlantic Copepods Université de Nantes: HAL-UNIV-NANTES |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
plankton preservation plankton delipidation pelagic fish trophic interactions spatial variability isotopic mixing model [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
spellingShingle |
plankton preservation plankton delipidation pelagic fish trophic interactions spatial variability isotopic mixing model [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology Chouvelon, Tiphaine Chappuis, Alexis Bustamante, Paco Lefebvre, Sébastien Mornet, Françoise Guillou, Gaël Violamer, Laurie Dupuy, Christine Trophic ecology of European sardine Sardina pilchardus and European anchovy Engraulis encrasicolus in the Bay of Biscay (north-east Atlantic) inferred from δ13C and δ15N values of fish and identified mesozooplanktonic organisms |
topic_facet |
plankton preservation plankton delipidation pelagic fish trophic interactions spatial variability isotopic mixing model [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
description |
International audience European sardine (Sardina pilchardus) and European anchovy (Engraulis encrasicolus) are two species of economical and ecological significance in the Bay of Biscay (north-east Atlantic). However, the trophic ecology of both species is still poorly known in the area, and more generally, few studies have considered the potential trophic overlap between sardines and anchovies worldwide. This study aims to highlight the trophic links between the mesozooplankton and adults of these two pelagic fish in the Bay of Biscay, through carbon and nitrogen stable isotopes analysis (SIA). Mesozooplankton and individuals of sardines and anchovies were collected during one season (spring 2010), over spatially contrasted stations within the study area. First, the potential effect of preservation (ethanol vs. freezing) and of delipidation (by cyclohexane) on mesozooplankton δ13C and δ15N values was assessed. Results demonstrated the necessity to correct for the preservation effect and for lipid contents in mesozooplankton for further analyses of sardines' and anchovies' diet through SIA. Next, this study highlighted the interest of working on identified mesozooplanktonic organisms instead of undetermined assemblages when unravelling food sources of planktivorous fish using stable isotopes. The inter-specific variability of isotope values within a planktonic assemblage was effectively high, probably depending on the various feeding behaviours that can occur among mesozooplankton species. Intra-specific variability was also significant and related to the spatial variations of baseline signatures in the area. To investigate the foraging areas and potential diet overlap of S. pilchardus and E. encrasicolus, mixing models (SIAR) were applied. Both fish species appeared to feed mainly in the neritic waters of the Bay of Biscay in spring and to select mainly small- to medium-sized copepods (e.g. Acartia sp., Temora sp.). However, E. encrasicolus showed a greater trophic plasticity by foraging more offshore and on ... |
author2 |
LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Laboratoire Ressources Halieutiques (LRH) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
format |
Article in Journal/Newspaper |
author |
Chouvelon, Tiphaine Chappuis, Alexis Bustamante, Paco Lefebvre, Sébastien Mornet, Françoise Guillou, Gaël Violamer, Laurie Dupuy, Christine |
author_facet |
Chouvelon, Tiphaine Chappuis, Alexis Bustamante, Paco Lefebvre, Sébastien Mornet, Françoise Guillou, Gaël Violamer, Laurie Dupuy, Christine |
author_sort |
Chouvelon, Tiphaine |
title |
Trophic ecology of European sardine Sardina pilchardus and European anchovy Engraulis encrasicolus in the Bay of Biscay (north-east Atlantic) inferred from δ13C and δ15N values of fish and identified mesozooplanktonic organisms |
title_short |
Trophic ecology of European sardine Sardina pilchardus and European anchovy Engraulis encrasicolus in the Bay of Biscay (north-east Atlantic) inferred from δ13C and δ15N values of fish and identified mesozooplanktonic organisms |
title_full |
Trophic ecology of European sardine Sardina pilchardus and European anchovy Engraulis encrasicolus in the Bay of Biscay (north-east Atlantic) inferred from δ13C and δ15N values of fish and identified mesozooplanktonic organisms |
title_fullStr |
Trophic ecology of European sardine Sardina pilchardus and European anchovy Engraulis encrasicolus in the Bay of Biscay (north-east Atlantic) inferred from δ13C and δ15N values of fish and identified mesozooplanktonic organisms |
title_full_unstemmed |
Trophic ecology of European sardine Sardina pilchardus and European anchovy Engraulis encrasicolus in the Bay of Biscay (north-east Atlantic) inferred from δ13C and δ15N values of fish and identified mesozooplanktonic organisms |
title_sort |
trophic ecology of european sardine sardina pilchardus and european anchovy engraulis encrasicolus in the bay of biscay (north-east atlantic) inferred from δ13c and δ15n values of fish and identified mesozooplanktonic organisms |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-00903728 https://hal.science/hal-00903728v2/document https://hal.science/hal-00903728v2/file/Chouvelon_et_al_2014_JSR.pdf |
genre |
North East Atlantic Copepods |
genre_facet |
North East Atlantic Copepods |
op_source |
ISSN: 1385-1101 EISSN: 1873-1414 Journal of Sea Research (JSR) https://hal.science/hal-00903728 Journal of Sea Research (JSR), 2014, 85, pp.277-291 |
op_relation |
hal-00903728 https://hal.science/hal-00903728 https://hal.science/hal-00903728v2/document https://hal.science/hal-00903728v2/file/Chouvelon_et_al_2014_JSR.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766138845361864704 |