Perinatal variation and covariation of oxidative status and telomere length in yellow-legged gull chicks.

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Etat: Public
Version: Final published version
Licence: CC BY-NC 4.0
ID Serval
serval:BIB_21517C5BE65F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Perinatal variation and covariation of oxidative status and telomere length in yellow-legged gull chicks.
Périodique
Current zoology
Auteur(s)
Parolini M., Possenti C.D., Romano A., Caprioli M., Rubolini D., Saino N.
ISSN
1674-5507 (Print)
ISSN-L
1674-5507
Statut éditorial
Publié
Date de publication
10/2019
Peer-reviewed
Oui
Volume
65
Numéro
5
Pages
509-516
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
The perinatal period is critical to survival and performance of many organisms. In birds, rapid postnatal growth and sudden exposure to aerial oxygen around hatching markedly affect the chick redox status, with potentially negative consequences on physiology mediated by oxidative stress. In addition, telomere length (TL) undergoes reduction during birds' early life, partly depending on oxidative status. However, relatively few studies have focused specifically on the changes in oxidative status and TL that occur immediately after hatching. In this study of the yellow-legged gull Larus michahellis, we found that chicks undergo a marked increase in plasma total antioxidant capacity and a marked decrease in the concentration of pro-oxidant molecules during the first days after hatching. In addition, TL in erythrocytes decreased by 1 standard deviation over the 4 days post-hatching. Body mass and tarsus length covaried with total antioxidant capacity and concentration of pro-oxidants in a complex way, that partly depended on sex and laying order, suggesting that oxidative status can affect growth. Moreover, TL positively covaried with the concentration of pro-oxidant molecules, possibly because retention of high concentrations of pro-oxidant molecules results from mechanisms of prevention of their negative effects, including reduction in TL. Thus, this study shows that chicks undergo marked variation in oxidative status, which predicts growth and subsequent TL, prompting for more studies of the perinatal changes in the critical post-hatching stages.
Mots-clé
early-life period, oxidative status, telomeres, yellow-legged gull
Pubmed
Web of science
Open Access
Oui
Création de la notice
26/08/2020 9:23
Dernière modification de la notice
15/01/2021 7:08
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