The role of territory choice mate choice and arrival date on breeding success in the Savi's warbler (Locustella luscinioides)

Détails

ID Serval
serval:BIB_64CC331BE507
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
The role of territory choice mate choice and arrival date on breeding success in the Savi's warbler (Locustella luscinioides)
Périodique
Journal of Avian Biology
Auteur⸱e⸱s
Aebischer A., Perrin N., Krieg M., Studer J. M., Meyer D.
ISSN
0908-8857
Statut éditorial
Publié
Date de publication
1996
Peer-reviewed
Oui
Volume
27
Numéro
2
Pages
143-152
Langue
anglais
Notes
ID979C6C040A3D_
http://www.jstor.org/stable/3677143
Résumé
We investigated how territory quality, settlement date and morphometry affected several components of yearly breeding success of a Swiss population of Savi's Warblers Locustella luscinioides. Territories occupied by males differed from unoccupied sites of similar size and location by having higher and denser reeds, a more extensive straw litter, and a thicker cover of dead sedge leaves. Territories with these characteristics were the ones first chosen by males upon spring arrival. These males, however, did not differ in morphometry from those that arrived later. Availability of suitable nesting sites; rather than food availability, appears to be an important choice criterion for territories. Early arriving males had higher breeding success than late males because of a higher mating success and more successful clutches. The positive correlation between male breeding success and territory quality was thus mediated through their common dependence on occupancy date. Female breeding success decreased with the date of first-clutch laying, mainly because late-nesting females fledged fewer broods. Breeding success in either sex did not correlate with morphometry. Our results provide clear support for territory choice by males, but not for mate or territory choice by females, and show the crucial role played by individual settlement date on many aspects of the breeding cycle of both sexes. We propose a lottery model of mate choice. arriving females obtain the best available territories even without choosing mates or territories; since males occupy territories sequentially and in order of decreasing quality, the few unpaired males available at any moment also occupy the best available territories.
Mots-clé
RED-WINGED BLACKBIRD, TIT PARUS-MAJOR, FEMALE CHOICE, ACROCEPHALUS-ARUNDINACEUS, SEXUAL SELECTION, SONG REPERTOIRES, WILLOW WARBLER, POLYGYNY, QUALITY
Web of science
Création de la notice
24/01/2008 18:54
Dernière modification de la notice
20/08/2019 15:21
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