Food availability dictates the timing of parturition in insectivorous mouse-eared bats

Détails

ID Serval
serval:BIB_252A20228D52
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Food availability dictates the timing of parturition in insectivorous mouse-eared bats
Périodique
Oikos
Auteur(s)
Arlettaz R., Christe P., Lugon A., Perrin N., Vogel P.
ISSN
0030-1299
Statut éditorial
Publié
Date de publication
2001
Peer-reviewed
Oui
Volume
95
Numéro
1
Pages
105-111
Langue
anglais
Notes
IZEAID737C67C4F414_
Résumé
Which of these two confounding factors, weather or food availability - that largely correlate and interact - controls the timing of parturition in insectivorous bats? To answer this question. we took advantage of a predator-prey system that offers a unique opportunity to perform natural experiments. The phenology of reproduction of two sibling bat species that inhabit the same colonial roosts, but exploit different feeding niches. was investigated. Myotis myotis feeds mainly on carabid beetles, a food source available from the end of hibernation onwards, whereas bush crickets, the main prey of M. blythii, are not available early in the season due to their successive instars; cockchafers are actually the sole possible alternative prey for M. blythii at that time of the year, but they occur every third year only, independently of local weather conditions. By comparing the species responses to the presence/absence of cockchafers, we could test the hypothesis that food availability, rather than climate. influences the timing of bat parturition. Our data show that Nt. blythii gave birth, on average. 10 d later than M. myotis in years without cockchafers, whilst parturition (1) was synchronous during cockchafer years, and (2) did not show much among-year time variation in M. myotis. This suggests that food availability is the chief factor regulating the timing of parturition in mouse-eared bats.
Mots-clé
SPECIES MYOTIS-MYOTIS, GREATER HORSESHOE BATS, BROWN BATS, POPULATION-CHANGES, SUPPLEMENTAL FOOD, BLYTHII, PREGNANCY, LACTATION, VESPERTILIONIDAE, REPRODUCTION
Web of science
Création de la notice
24/01/2008 20:14
Dernière modification de la notice
20/08/2019 14:03
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