La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Age-dependent changes in biometrics indicate senescence in the European Blackbird Turdus merula (2018)
Auteurs :	Piotr Piliczewski, Auteur ; Łukasz Jankowiak, Auteur ; Dariusz Wysocki, Auteur
Type de document :	Article
Dans :	Bird Study (65(2) June, 2018)
Article en page(s) :	219-224
Résumé :	Capsule: A 19-year study of European Blackbirds Turdus merula confirms that senescence is associated with a decrease in condition measured by wing length but bills become progressively longer with age.Aims: To explore the correlations between biometrics of Blackbirds and age, to identify possible links with senescence.Methods: During the 19 years of the study, 801 birds of known age were measured: 431 males and 370 females, aged from 2 to 10 years. Among these 91 males and 50 females were retrapped at least one moult later. For each bird, there were at least one set of measurements when fully grown.Results: Wing length increased until the sixth year of life after which it started to decrease. An increase in bill length throughout the lifetime was found in both sexes.Conclusion: Changes in wing length correspond with an earlier study of this population suggesting the onset of senescence after the fifth to sixth calendar year of life.
En ligne :	https://doi.org/10.1080/00063657.2018.1451821

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