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Migratory Eurasian blackbirds have longer telomere length but similar mitochondrial density than resident conspecifics

Telomeres are regarded as key markers of cellular ageing and physiological state. Oxidative stress, which can accelerate telomere shortening, is thought to increase during energetically demanding processes such as bird migration. However, their study in the context of migratory behaviour is limited....

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Autori principali: Salmón, Pablo (Autore) , Ellermann, Sophie (Autore) , Wellbrock, Natalie (Autore) , Frias Soler, Roberto Carlos (Autore) , Bairlein, Franz (Autore) , Liedvogel, Miriam (Autore)
Natura: Article (Journal)
Lingua:inglese
Pubblicazione: January 2026
In: Journal of avian biology
Year: 2026, Volume: 2026, Fascicolo: 1, Pages: 1-6
ISSN:1600-048X
DOI:10.1002/jav.03547
Accesso online:Verlag, kostenfrei, Volltext: https://doi.org/10.1002/jav.03547
Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/jav.03547
Testo
Note sull'autore:Pablo Salmón, Sophie Ellermann, Natalie Wellbrock, Roberto Carlos Frias-Soler, Franz Bairlein and Miriam Liedvogel
Descrizione
Riassunto:Telomeres are regarded as key markers of cellular ageing and physiological state. Oxidative stress, which can accelerate telomere shortening, is thought to increase during energetically demanding processes such as bird migration. However, their study in the context of migratory behaviour is limited. Here we compared telomere length (TL) and mitochondrial DNA copy number (mitoDNAcn) between migratory and resident Eurasian blackbirds on the island of Helgoland, a migratory stopover site. Contrary to expectations, we found migrants had longer TLs despite similar mitochondrial densities. These findings reinforce the idea that migratory individuals may possess specific physiological adaptations, such as enhanced antioxidant defences, that help preserve telomere integrity. Overall, our results underscore the complex interactions between migratory behaviour and cellular maintenance and point to the need for broader comparative studies across species and migratory strategies.
Descrizione del documento:Zuerst veröffentlicht: 29. Januar 2026
Gesehen am 08.06.2026
Descrizione fisica:Online Resource
ISSN:1600-048X
DOI:10.1002/jav.03547

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