Experimentally increased reproductive effort alters telomere length in the blue tit (Cyanistes caeruleus )
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منابع مشابه
The intensity threshold of colour vision in a passerine bird, the blue tit (Cyanistes caeruleus).
Many vertebrates use colour vision for vital behaviour but their visual performance in dim light is largely unknown. The light intensity threshold of colour vision is known only for humans, horses and two parrot species. Here, we first explore this threshold in a passerine bird, the blue tit (Cyanistes caeruleus). Using classic conditioning of colour cues to food rewards in three individuals, w...
متن کاملDo glucocorticoids predict fitness? Linking environmental conditions, corticosterone and reproductive success in the blue tit, Cyanistes caeruleus
Glucocorticoids, including corticosterone (CORT), have been suggested to provide a physiological link between ecological conditions and fitness. Specifically, CORT, which is elevated in response to harsh conditions, is predicted to be correlated with reduced fitness. Yet, empirical studies show that CORT can be non-significantly, positively and negatively linked with fitness. Divergent environm...
متن کاملPlumage yellowness predicts foraging ability in the blue tit Cyanistes caeruleus
Carotenoid-based coloration in adult birds has been often regarded as an honest signal of individual quality. However, few studies have demonstrated a link between carotenoid display and the quantity or quality of resources provided to the offspring. The present study investigated the expression of a carotenoid-based ornament, the breast plumage yellowness of the blue tit Cyanistes caeruleus, i...
متن کاملLow Cross-Sex Genetic Correlation in Carotenoid-Based Plumage Traits in the Blue Tit Nestlings (Cyanistes caeruleus)
In some bird species, both adult and juvenile individuals are often brightly coloured. It has been commonly assumed that identical plumage colouration present in both sexes results from strong intersexual genetic correlations in colour-related traits. Here, we aimed at testing this hypothesis in juvenile individuals and looked at genetic parameters describing carotenoid-based colouration of blu...
متن کاملAromatic plants in blue tit Cyanistes caeruleus nests: no negative effect on blood-sucking Protocalliphora blow fly larvae
A. Mennerat (correspondence), P. Perret and M. M. Lambrechts, Centre d’Ecologie Fonctionnelle et Evolutive, 1919 Route de Mende, Cedex 5, 34293 Montpellier, France. E-mail: [email protected]. S. P. Caro, Centre d’Ecologie Fonctionnelle et Evolutive and the Netherlands Institute of Ecology, P.O. Box 40, 6666 ZG Heteren, The Netherlands. P. Heeb, Laboratoire Evolution & Diversité Biolog...
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ژورنال
عنوان ژورنال: Journal of Evolutionary Biology
سال: 2014
ISSN: 1010-061X
DOI: 10.1111/jeb.12479