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Auteur (up) Eckbo, N.; Le Bohec, C.; Planas-Bielsa, V.; Warner, N.A.; Schull, Q.; Herzke, D.; Zahn, S.; Haarr, A.; Gabrielsen, G.W.; Borga, K. doi  openurl
  Titre Individual variability in contaminants and physiological status in a resident Arctic seabird species Type Article scientifique
  Année 2019 Publication Revue Abrégée Environ. Pollut.  
  Volume 249 Numéro Pages 191-199  
  Mots-Clés Black guillemot; black guillemots; eggs; mercury; organochlorines; Oxidative stress; persistent organic pollutants; Polar regions; Pollutants; Seabirds; stable-isotopes; stress; telomere length; Telomeres; temporal trends; trophic relationships  
  Résumé While migratory seabirds dominate ecotoxicological studies within the Arctic, there is limited knowledge about exposure and potential effects from circulating legacy and emerging contaminants in species who reside in the high-Arctic all year round. Here, we focus on the case of the Mandt's Black guillemot (Cepphus grylle mandril) breeding at Kongsfjorden, Svalbard (79.00 degrees N, 11.66 degrees E) and investigate exposure to legacy and emerging contaminants in relation to individual physiological status, i.e. body condition, oxidative stress and relative telomere length. Despite its benthic-inshore foraging strategy, the Black guillemot displayed overall similar contaminant concentrations in blood during incubation (Sigma PCB11(15.7 ng/g w.w.) > Sigma PFAS(5) (9.9 ng/g w.w.)> Sigma Pesticides(9) (6.7 ng/g w.w.) > Sigma PBDE4 (2.7 ng/g w.w.), and Hg (0.3 mu g/g d.w.) compared to an Arctic migratory seabird in which several contaminant-related stress responses have been observed. Black guillemots in poorer condition tended to display higher levels of contaminants, higher levels of reactive oxygen metabolites, lower plasmatic antioxidant capacity, and shorter telomere lengths; however the low sample size restrict any strong conclusions. Nevertheless, our data suggests that nonlinear relationships with a threshold may exist between accumulated contaminant concentrations and physiological status of the birds. These findings were used to build a hypothesis to be applied in future modelling for describing how chronic exposure to contaminants may be linked to telomere dynamics. (C) 2019 Published by Elsevier Ltd.  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 0269-7491 ISBN Médium  
  Région Expédition Conférence  
  Notes WOS:000471081300021 Approuvé pas de  
  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2607  
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