| Titre : | Nestling provisioning by male and female Yellow-breasted Chats: no relationships between morphology and parental care |
| Auteurs : | S. W. Cooper, Auteur ; G. Ritchison, Auteur |
| Type de document : | Article |
| Dans : | Journal of Field Ornithology (76(3) SUM 2005) |
| Article en page(s) : | 298-302 |
| Langues: | Anglais |
| Résumé : | In birds, males and females may benefit by choosing mates based on morphological characteristics correlated with their ability to provide parental care. Our objective was to examine possible relationships between morphological characteristics and the provisioning behavior of male and female Yellow-breasted Chats (Icteria virens). No differences were found in the provisioning behavior of male and female Yellow-breasted Chats. Adult chats provisioned nestlings at higher rates and delivered more biomass at first nests than during later nesting attempts. This indicates that, later in the breeding season, nestling chats may require less energy, perhaps because warmer temperatures lower thermoregulatory costs. No correlations, either positive or negative, between chat morphological characteristics (mass, eye stripe length, tail length, wing chord, tarsus length, and plumage color) and provisioning behavior were noted. Thus, these results do not provide support for either the honest advertisement hypothesis (that predicts a positive relationship between quality and parental care) or the differential allocation hypothesis (that predicts a negative relationship). If mare choice among chats is based on future parental care, the absence of such correlations Suggests that characteristics other than those examined in this study may be used by chats. Alternatively, chats may not base mate choice decisions on future parental care, but rather on other features such as territory quality. |
Bibliothèque Tour du Valat
Se connecter
La Tour du Valat
Institut de recherche pour la conservation des zones humides méditerranéennes- Les publications récentes de la Tour du Valat
- Catalogue en ligne du centre de ressources
- A la une
-
Sélections
- Les écrits de Luc Hoffmann, fondateur de la Tour du Valat
- Des références récentes sur les zones humides méditerranéennes
- Quelques exemples d'impact du changement climatique sur les zones humides
- Quelques références bibliographiques sur la grippe aviaire
- Les recherches de la Tour du Valat sur le saturnisme
- De récentes publications sur la Camargue
- Le fonds Camargue de la bibliothèque
- Coordination géographique
- Nous contacter
Infos pratiques
Heures d'ouverture et contact
Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...
Liens utiles
- 1 - Le site Internet de la Fondation Tour du Valat
- 2 - La base documentaire du Pôle-relais lagunes méditerranéennes
- 3 - Le site Internet consacré aux Oiseaux d'eau en région Méditerranée
- 4 - Le site Internet ObsNature Camargue -Crau-Alpilles - recueil de données d'observations naturalistes
- 5 - Le site Internet de MedWet, l’initiative pour les zones humides méditerranéennes
