Age-Related Mercury Contamination and Relationship with Luteinizing Hormone in a Long-Lived Antarctic Bird
International audience Seabirds, as long-lived top predators, accumulate contaminants such as mercury (Hg), an established endocrine disruptor. In long lived species hormonal secretion varies with age; therefore, Hg-induced endocrine disruption may be exacerbated in some age classes. Here we investi...
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ftunivrochelle:oai:HAL:hal-01079318v1 2024-02-11T09:55:48+01:00 Age-Related Mercury Contamination and Relationship with Luteinizing Hormone in a Long-Lived Antarctic Bird Tartu, Sabrina Bustamante, Paco Goutte, Aurélie Cherel, Yves Weimerskirch, Henri Bustnes, Jan Owe Chastel, Olivier Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Norwegian Institute for Nature Research (NINA) 2014 https://hal.science/hal-01079318 https://hal.science/hal-01079318/document https://hal.science/hal-01079318/file/Tartu%20et%20al%202014%20PlosOne.pdf https://doi.org/10.1371/journal.pone.0103642.t004 en eng HAL CCSD Public Library of Science info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0103642.t004 info:eu-repo/semantics/altIdentifier/pmid/25072936 hal-01079318 https://hal.science/hal-01079318 https://hal.science/hal-01079318/document https://hal.science/hal-01079318/file/Tartu%20et%20al%202014%20PlosOne.pdf doi:10.1371/journal.pone.0103642.t004 PUBMED: 25072936 info:eu-repo/semantics/OpenAccess ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.science/hal-01079318 PLoS ONE, 2014, 9 (7), pp.e103642. ⟨10.1371/journal.pone.0103642.t004⟩ age mercury Pagodroma nivea sex-related segregation Antarctica Luteinizing hormone stable isotopes [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology info:eu-repo/semantics/article Journal articles 2014 ftunivrochelle https://doi.org/10.1371/journal.pone.0103642.t004 2024-01-23T23:35:57Z International audience Seabirds, as long-lived top predators, accumulate contaminants such as mercury (Hg), an established endocrine disruptor. In long lived species hormonal secretion varies with age; therefore, Hg-induced endocrine disruption may be exacerbated in some age classes. Here we investigated relationships between blood total Hg and luteinizing hormone (LH, a key pituitary hormone for the onset of breeding), in pre-laying known-age (11-45 years old) snow petrels (Pagodroma nivea) from Adélie Land, Antarctica. We predicted that 1) blood Hg would increase with advancing age as a consequence of bio-accumulation; and that 2) increasing blood Hg would be related to decreased concentrations of LH in the most Hg-contaminated individuals. Hg concentrations were higher in females than in males (p<0.001), and contrary to our prediction, decreased with advancing age in males (p=0.009) and tended to do so in females (p=0.06). The analysis of stable isotopes (δ13C and δ15N) suggested that this unexpected pattern could originate from age and sex-related variations in trophic niche, and hence Hg exposure. Regarding LH, our prediction was only supported in young birds (≤ 23 years) where baseline LH was inversely correlated with Hg concentrations (p=0.04). Hg burden did not predict baseline LH or GnRH-induced LH in birds that were more than 23 years old. These results show that age and contaminants may interfere with major endocrine mechanisms and, together with other recent studies, support the view that Hg could be connected to LH secretion and could then impair the fitness of long-lived birds. Article in Journal/Newspaper Antarc* Antarctic Antarctica Snow Petrels HAL - Université de La Rochelle Antarctic Nivea ENVELOPE(-45.479,-45.479,-60.580,-60.580) |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
age mercury Pagodroma nivea sex-related segregation Antarctica Luteinizing hormone stable isotopes [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
spellingShingle |
age mercury Pagodroma nivea sex-related segregation Antarctica Luteinizing hormone stable isotopes [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology Tartu, Sabrina Bustamante, Paco Goutte, Aurélie Cherel, Yves Weimerskirch, Henri Bustnes, Jan Owe Chastel, Olivier Age-Related Mercury Contamination and Relationship with Luteinizing Hormone in a Long-Lived Antarctic Bird |
topic_facet |
age mercury Pagodroma nivea sex-related segregation Antarctica Luteinizing hormone stable isotopes [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
description |
International audience Seabirds, as long-lived top predators, accumulate contaminants such as mercury (Hg), an established endocrine disruptor. In long lived species hormonal secretion varies with age; therefore, Hg-induced endocrine disruption may be exacerbated in some age classes. Here we investigated relationships between blood total Hg and luteinizing hormone (LH, a key pituitary hormone for the onset of breeding), in pre-laying known-age (11-45 years old) snow petrels (Pagodroma nivea) from Adélie Land, Antarctica. We predicted that 1) blood Hg would increase with advancing age as a consequence of bio-accumulation; and that 2) increasing blood Hg would be related to decreased concentrations of LH in the most Hg-contaminated individuals. Hg concentrations were higher in females than in males (p<0.001), and contrary to our prediction, decreased with advancing age in males (p=0.009) and tended to do so in females (p=0.06). The analysis of stable isotopes (δ13C and δ15N) suggested that this unexpected pattern could originate from age and sex-related variations in trophic niche, and hence Hg exposure. Regarding LH, our prediction was only supported in young birds (≤ 23 years) where baseline LH was inversely correlated with Hg concentrations (p=0.04). Hg burden did not predict baseline LH or GnRH-induced LH in birds that were more than 23 years old. These results show that age and contaminants may interfere with major endocrine mechanisms and, together with other recent studies, support the view that Hg could be connected to LH secretion and could then impair the fitness of long-lived birds. |
author2 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Norwegian Institute for Nature Research (NINA) |
format |
Article in Journal/Newspaper |
author |
Tartu, Sabrina Bustamante, Paco Goutte, Aurélie Cherel, Yves Weimerskirch, Henri Bustnes, Jan Owe Chastel, Olivier |
author_facet |
Tartu, Sabrina Bustamante, Paco Goutte, Aurélie Cherel, Yves Weimerskirch, Henri Bustnes, Jan Owe Chastel, Olivier |
author_sort |
Tartu, Sabrina |
title |
Age-Related Mercury Contamination and Relationship with Luteinizing Hormone in a Long-Lived Antarctic Bird |
title_short |
Age-Related Mercury Contamination and Relationship with Luteinizing Hormone in a Long-Lived Antarctic Bird |
title_full |
Age-Related Mercury Contamination and Relationship with Luteinizing Hormone in a Long-Lived Antarctic Bird |
title_fullStr |
Age-Related Mercury Contamination and Relationship with Luteinizing Hormone in a Long-Lived Antarctic Bird |
title_full_unstemmed |
Age-Related Mercury Contamination and Relationship with Luteinizing Hormone in a Long-Lived Antarctic Bird |
title_sort |
age-related mercury contamination and relationship with luteinizing hormone in a long-lived antarctic bird |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-01079318 https://hal.science/hal-01079318/document https://hal.science/hal-01079318/file/Tartu%20et%20al%202014%20PlosOne.pdf https://doi.org/10.1371/journal.pone.0103642.t004 |
long_lat |
ENVELOPE(-45.479,-45.479,-60.580,-60.580) |
geographic |
Antarctic Nivea |
geographic_facet |
Antarctic Nivea |
genre |
Antarc* Antarctic Antarctica Snow Petrels |
genre_facet |
Antarc* Antarctic Antarctica Snow Petrels |
op_source |
ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.science/hal-01079318 PLoS ONE, 2014, 9 (7), pp.e103642. ⟨10.1371/journal.pone.0103642.t004⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0103642.t004 info:eu-repo/semantics/altIdentifier/pmid/25072936 hal-01079318 https://hal.science/hal-01079318 https://hal.science/hal-01079318/document https://hal.science/hal-01079318/file/Tartu%20et%20al%202014%20PlosOne.pdf doi:10.1371/journal.pone.0103642.t004 PUBMED: 25072936 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0103642.t004 |
_version_ |
1790598878294179840 |