Inter-specific and ontogenic differences in δ13C and δ15N values and Hg and Cd concentrations in cephalopods
International audience Chemical tracers (e.g. stable isotopes or trace metals) are increasingly used to study trophic ecology and feeding habits of marine organisms and various factors can affect their values. The aim of the present study was to provide information on ontogenic effects on stable car...
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Online Access: | https://hal.archives-ouvertes.fr/hal-00613955 https://doi.org/10.3354/meps09159 |
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ftunivrochelle:oai:HAL:hal-00613955v1 2023-05-15T17:38:36+02:00 Inter-specific and ontogenic differences in δ13C and δ15N values and Hg and Cd concentrations in cephalopods Chouvelon, Tiphaine Spitz, J. Cherel, Yves Caurant, Florence Sirmel, R. Mèndez-Fernandez, P. Bustamante, Paco LIttoral ENvironnement et Sociétés - UMR 7266 (LIENSs) Institut national des sciences de l'Univers (INSU - CNRS)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) 2011 https://hal.archives-ouvertes.fr/hal-00613955 https://doi.org/10.3354/meps09159 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps09159 hal-00613955 https://hal.archives-ouvertes.fr/hal-00613955 doi:10.3354/meps09159 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.archives-ouvertes.fr/hal-00613955 Marine Ecology Progress Series, Inter Research, 2011, 433, pp.107-120. ⟨10.3354/meps09159⟩ Stable isotopes Metals Trace elements Ontogenesis Prey Ecological tracer Northeastern Atlantic [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2011 ftunivrochelle https://doi.org/10.3354/meps09159 2022-08-09T22:33:37Z International audience Chemical tracers (e.g. stable isotopes or trace metals) are increasingly used to study trophic ecology and feeding habits of marine organisms and various factors can affect their values. The aim of the present study was to provide information on ontogenic effects on stable carbon and nitrogen values (δ13C and δ15N) and on cadmium (Cd) and mercury (Hg) concentrations in 5 cephalopod species from the Bay of Biscay (North-East Atlantic Ocean). To this end, individuals belonging to 3 species showing the widest range of sizes were analysed for muscle δ13C and δ15N values and muscle Hg, and digestive gland Cd concentrations. Results showed that stable isotope ratios allowed discrimination of specific feeding strategies during ontogenesis. Segregation between 5 cephalopod species in terms of trophic ecology was also evidenced (different isotopic niches). In contrast, Hg concentrations varied over the same order of magnitude in these 5 cephalopod species, despite higher levels in the benthic octopus Eledone cirrhosa. Consistently, Hg concentrations followed the same ontogenic pattern and increased with increasing body size/age of cephalopods. Finally, Cd concentrations varied over 3 orders of magnitude among the 5 species. Despite possible effects of physiology in terms of metal bioaccumulation, Cd concentrations were likely to reflect specific feeding preferences or feeding zones and ontogenic variability within a single species. Thus, ontogenic effects have to be taken into account when stable isotope ratios of carbon and nitrogen or trace metals are used as ecological tracers; the best recommendation being to focus on a given class age. Article in Journal/Newspaper North East Atlantic HAL - Université de La Rochelle Marine Ecology Progress Series 433 107 120 |
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Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
Stable isotopes Metals Trace elements Ontogenesis Prey Ecological tracer Northeastern Atlantic [SDE]Environmental Sciences |
spellingShingle |
Stable isotopes Metals Trace elements Ontogenesis Prey Ecological tracer Northeastern Atlantic [SDE]Environmental Sciences Chouvelon, Tiphaine Spitz, J. Cherel, Yves Caurant, Florence Sirmel, R. Mèndez-Fernandez, P. Bustamante, Paco Inter-specific and ontogenic differences in δ13C and δ15N values and Hg and Cd concentrations in cephalopods |
topic_facet |
Stable isotopes Metals Trace elements Ontogenesis Prey Ecological tracer Northeastern Atlantic [SDE]Environmental Sciences |
description |
International audience Chemical tracers (e.g. stable isotopes or trace metals) are increasingly used to study trophic ecology and feeding habits of marine organisms and various factors can affect their values. The aim of the present study was to provide information on ontogenic effects on stable carbon and nitrogen values (δ13C and δ15N) and on cadmium (Cd) and mercury (Hg) concentrations in 5 cephalopod species from the Bay of Biscay (North-East Atlantic Ocean). To this end, individuals belonging to 3 species showing the widest range of sizes were analysed for muscle δ13C and δ15N values and muscle Hg, and digestive gland Cd concentrations. Results showed that stable isotope ratios allowed discrimination of specific feeding strategies during ontogenesis. Segregation between 5 cephalopod species in terms of trophic ecology was also evidenced (different isotopic niches). In contrast, Hg concentrations varied over the same order of magnitude in these 5 cephalopod species, despite higher levels in the benthic octopus Eledone cirrhosa. Consistently, Hg concentrations followed the same ontogenic pattern and increased with increasing body size/age of cephalopods. Finally, Cd concentrations varied over 3 orders of magnitude among the 5 species. Despite possible effects of physiology in terms of metal bioaccumulation, Cd concentrations were likely to reflect specific feeding preferences or feeding zones and ontogenic variability within a single species. Thus, ontogenic effects have to be taken into account when stable isotope ratios of carbon and nitrogen or trace metals are used as ecological tracers; the best recommendation being to focus on a given class age. |
author2 |
LIttoral ENvironnement et Sociétés - UMR 7266 (LIENSs) Institut national des sciences de l'Univers (INSU - CNRS)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Chouvelon, Tiphaine Spitz, J. Cherel, Yves Caurant, Florence Sirmel, R. Mèndez-Fernandez, P. Bustamante, Paco |
author_facet |
Chouvelon, Tiphaine Spitz, J. Cherel, Yves Caurant, Florence Sirmel, R. Mèndez-Fernandez, P. Bustamante, Paco |
author_sort |
Chouvelon, Tiphaine |
title |
Inter-specific and ontogenic differences in δ13C and δ15N values and Hg and Cd concentrations in cephalopods |
title_short |
Inter-specific and ontogenic differences in δ13C and δ15N values and Hg and Cd concentrations in cephalopods |
title_full |
Inter-specific and ontogenic differences in δ13C and δ15N values and Hg and Cd concentrations in cephalopods |
title_fullStr |
Inter-specific and ontogenic differences in δ13C and δ15N values and Hg and Cd concentrations in cephalopods |
title_full_unstemmed |
Inter-specific and ontogenic differences in δ13C and δ15N values and Hg and Cd concentrations in cephalopods |
title_sort |
inter-specific and ontogenic differences in δ13c and δ15n values and hg and cd concentrations in cephalopods |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.archives-ouvertes.fr/hal-00613955 https://doi.org/10.3354/meps09159 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.archives-ouvertes.fr/hal-00613955 Marine Ecology Progress Series, Inter Research, 2011, 433, pp.107-120. ⟨10.3354/meps09159⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps09159 hal-00613955 https://hal.archives-ouvertes.fr/hal-00613955 doi:10.3354/meps09159 |
op_doi |
https://doi.org/10.3354/meps09159 |
container_title |
Marine Ecology Progress Series |
container_volume |
433 |
container_start_page |
107 |
op_container_end_page |
120 |
_version_ |
1766139121436196864 |