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NUITFRANCE - Bibliothèque - Fiche bibliographique
Bibliothèque
Cette rubrique recense :
- de la documentation sur les différents thèmes de la nuit (vie nocturne, pollution lumineuse, pollution sonore, ...).
- les données informatiques relatives à l'éclairage public digitalisées et mises à dispositions en open data par certaines communes,
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Quelques tags associés : [ DOCUMENTATION, PUBLICATIONS, LITTÉRATURE, CONNAISSANCES, LITTÉRATURE GRISE, ARTICLES DE PRESSE, ARTICLES SCIENTIFIQUES, TEXTES JURIDIQUES, PLANS ET PROGRAMMES, JURISPRUDENCE, DÉCRETS, THÈSES ]
► Fiche bibliographique
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Document " Effects of light and prey availability on nocturnal, lunar and seasonal activity of tropical nightjars "
Type de document : |
Articles de revue scientifique |
Thème du document : |
Nuit menacée - Lumière artificielle - Rapports proies/prédateurs |
Groupe biologique : |
Oiseaux hors rapaces nocturnes |
Auteur(s) : |
JETZ W.
STEFFEN J.
LINSENMAIR E.
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Date de publication : |
Décembre 2003 |
Langue : |
English/Anglais |
Nom du périodique : |
Oikos |
Précisions : |
Volume 103. Numéro 3. Pages 627–639 |
Lien contenu/source : |
http://onlinelibrary.wiley.com/doi/10.1034/j.1600-... |
DOI : |
10.1034/j.1600-0706.2003.12856.x |
Citation courte : |
Jetz et al. (2003) |
Citation complète (format NuitFrance) : |
JETZ W., STEFFEN J. & LINSENMAIR E. (2003). Effects of light and prey availability on nocturnal, lunar and seasonal activity of tropical nightjars. Oikos. Volume 103. Numéro 3. Pages 627–639. |
Résumé du document : |
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Nightjars and their allies represent the only major group of visually hunting aerial insectivores with a crepuscular and/or nocturnal lifestyle. Our purpose was to examine how both light regime and prey abundance in the tropics, where periods of twilight are extremely short, but nightjar diversity is high, affect activity across different temporal scales. We studied two nightjar species in West African bush savannah, standard-winged nightjars Macrodipteryx longipennis Shaw and long-tailed nightjars Caprimulgus climacurus Vieillot. We measured biomass of potential prey available using a vehicle mounted trap and found that it was highest at dusk and significantly lower at dawn and during the night. Based on direct observations, both nightjars exhibit the most intense foraging behaviour at dusk, less intense foraging at dawn and least at night, as predicted by both prey abundance and conditions for visual prey detection. Nocturnal foraging was positively correlated with lunar light levels and ceased below about 0.03 mW.m-2. Over the course of a lunar cycle, nocturnal light availability varied markedly, while prey abundance remained constant at dusk and at night was slightly higher at full moon. Both species increased twilight foraging activity during new moon periods, compensating for the shorter nocturnal foraging window at that time. Seasonally, the pattern of nocturnal light availability was similar throughout the year, while prey availability peaked shortly after onset of the wet season and then slowly decreased over the following four months. The courtship and breeding phenology of both species was timed to coincide with the peak in aerial insect abundance, suggesting that prey availability rather than direct abiotic factors act as constraints, at least at the seasonal level. Our findings illustrate the peculiar constraints on visually orienting aerial nocturnal insectivores in general and tropical nightjars in particular and highlight the resulting nocturnal, lunar and seasonal allocation of activities.
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Saisie sur NuitFrance par : |
Rosor |
Saisie sur NuitFrance en : |
Octobre 2014 |
Identifiant NuitFrance : |
NF-BIBLI-49 |
Permalien de la fiche NuitFrance : |
http://www.nuitfrance.fr/?page=donneesdoc&partie=fiche-bibliographique&id_doc=49 |
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