La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Effects of experience and a visual aid on ptilochronology
Auteurs :	Laura M. Frasz, Auteur ; Jason D. Fischer, Auteur ; James R. Miller, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (155(1) JAN 2014)
Article en page(s) :	319-322
Langues:	Anglais
Résumé :	Ptilochronology, the study of feather growth bars, has been used to assess nutritional condition, yet the implementation of this technique can be challenging. This study investigated how a magnification aid and level of experience with the technique affected the variability and accuracy of ptilochronology measurements. The average width of growth bars was significantly narrower when made with a magnifying visor as opposed to the unaided eye, suggesting that future ptilochronology studies should incorporate magnification. Measurements were also influenced by the measurer's level of experience, suggesting that a learning curve must be taken into account when analyzing ptilochronology results.

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...