Polychlorinated biphenyl exposure and corticosterone levels in seven polar seabird species
2015
Tartu, Sabrina | Angelier, Frédéric | Bustnes, J.O. | Moe, B. | Hanssen, S.A. | Herzke, D. | Gabrielsen, G.W. | Verboven, N. | Verreault, J. | Labadie, P. | Budzinski, H. | Wingfield, J.C. | 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) | Division of Arctic Ecology (NINA) ; Norwegian Institute for Nature Research (NINA) | Norwegian Institute for Nature Research (NINA) | Norwegian Institute for Air Research (NILU) | Norwegian Polar Institute | Division of Cell Sciences ; Faculty of Veterinary Medicine | Centre de Recherche en Toxicologie de l'environnement (TOXEN) ; Département des Sciences Biologiques [Montréal] ; Université du Québec à Montréal = University of Québec in Montréal (UQAM)-Université du Québec à Montréal = University of Québec in Montréal (UQAM) | Environnements et Paléoenvironnements OCéaniques (EPOC) ; Observatoire aquitain des sciences de l'univers (OASU) ; Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) | Department of Neurobiology, Physiology, and Behavior ; University of California (UC)
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Show more [+] Less [-]English. The role of polychlorinated biphenyls (PCBs) on exposure-related endocrine effects has been poorlyinvestigated in wild birds. This is the case for stress hormones including corticosterone (CORT). Somestudies have suggested that environmental exposure to PCBs and altered CORT secretion might beassociated. Here we investigated the relationships between blood PCB concentrations and circulatingCORT levels in seven free-ranging polar seabird species occupying different trophic positions, and hencecovering a wide range of PCB exposure. Blood P7PCB concentrations (range: 61e115,632 ng/g lw) werepositively associated to baseline or stress-induced CORT levels in three species and negatively associatedto stress-induced CORT levels in one species. Global analysis suggests that in males, baseline CORT levelsgenerally increase with increasing blood P7PCB concentrations, whereas stress-induced CORT levelsdecrease when reaching high blood P7PCB concentrations. This study suggests that the nature of thePCB-CORT relationships may depend on the level of PCB exposure.
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