La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Eggshell blue-green colouration fades immediately after oviposition: a cautionary note about measuring natural egg colours
Auteurs :	Juan Moreno, Auteur ; Elisa Lobato, Auteur ; Judith Morales, Auteur
Type de document :	Article
Dans :	Ornis Fennica (88(1) 2011)
Article en page(s) :	51-56
Langues:	Anglais
Résumé :	The colour fading in eggs of the Pied Flycatcher was studied in Spain. Egg colour for >400 eggs was estimated at the moment of oviposition, at the onset of incubation, and at the end of incubation. Results, obtained using a spectrophotometer, showed that egg colours tended to fade significantly during the study period. For unhatched eggs over longer time periods of 6 and 23 months after incubation, the blue-green colouration faded further still. These figures suggest that studies on egg colouration should account for temporal changes in egg colouration.

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