Avian eggshell pigments are not consistently correlated with colour measurements or egg constituents in two Turdus thrushes

0383765 - FGÚ 2013 RIV DK eng J - Článek v odborném periodiku
Cassey, P. - Mikšík, Ivan - Portugal, S. J. - Maurer, G. - Ewen, J.G. - Zarate, E. - Sewell, M.A. - Karadas, F. - Grim, T. - Hauber, M. E.
Avian eggshell pigments are not consistently correlated with colour measurements or egg constituents in two Turdus thrushes.
Journal of Avian Biology. Roč. 43, č. 6 (2012), s. 503-512. ISSN 0908-8857. E-ISSN 1600-048X
Institucionální podpora: RVO:67985823
Klíčová slova: eggshell * pigment * colour * thrush * blackbird
Kód oboru RIV: EG - Zoologie
Impakt faktor: 2.020, rok: 2012

We directly quantified eggshell pigment concentrations of blackbird Turdus merula and song thrush T. philomelos eggshells and tested how the two key pigments (protoporphyrin IX and biliverdin) co-varied with other eggshell traits and egg constituents.We found that protoporphyrin IX concentration was negatively associated with blue-green chroma in blackbirds but not in song thrush. The concentration of protoporphyrin IX was significantly greater in blackbirds and also showed different patterns of association with total yolk lipids and yolk carotenoid concentrations between these two species (significant species interaction terms). Our results reveal that it is not appropriate to simply assume in these two avian species that reflectance based eggshell colour measures are a suitable proxy for eggshell pigment concentrations or can be used as consistent predictors of maternal reproductive investment
Trvalý link: http://hdl.handle.net/11104/0213606