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NUITFRANCE - Bibliothèque - Fiche bibliographique
Bibliothèque
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Document " Assessment of predation risk via illumination level: facultative central place foraging in the cricetid rodent Phyllotis darwini "
Type de document : |
Articles de revue scientifique |
Thème du document : |
Nuit menacée - Lumière artificielle - Rapports proies/prédateurs |
Groupe biologique : |
Mammifères hors humains et chauves-souris |
Auteur(s) : |
VASQUEZ R.A.
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Date de publication : |
Mars 1994 |
Langue : |
English/Anglais |
Nom du périodique : |
Behavioral Ecology and Sociobiology |
Précisions : |
Volume 34. Numéro 5. Pages 375-381 |
Lien contenu/source : |
https://link.springer.com/article/10.1007/BF001970... |
DOI : |
10.1007/BF00197008 |
Mots-clefs : |
Central place foraging
Environmental illumination
Foraging behavior
Predation risk
Trade-off
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Citation courte : |
Vasquez (1994) |
Citation complète (format NuitFrance) : |
VASQUEZ R.A. (1994). Assessment of predation risk via illumination level: facultative central place foraging in the cricetid rodent Phyllotis darwini. Behavioral Ecology and Sociobiology. Volume 34. Numéro 5. Pages 375-381. |
Résumé du document : |
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It is well known that the risk of predation affects prey decision making. However, few studies have been concerned with the cues used by prey to assess this risk. Prey animals may use indirect environmental cues to assess predation hazard since direct evaluation may be dangerous. I studied the assessment of predation risk, manipulated via environmental illumination level, and the trade-off between foraging and predation hazard avoidance in the nocturnal rodent Phyllotis darwini (Rodentia: Cricetidae). In experimental arenas I simulated dark and full moon nights (which in nature correlate with low and high predation risk, respectively) and measured the immediate responses of animals to flyovers of a raptor model. Second, varying illumination only, I evaluated patch use, food consumption, central place foraging, and nocturnal variation of body weight. During flyover experiments, animals showed significantly more evasive reactions under full moon illumination than in moonless conditions. In the patch use experiments, rodents significantly increased their giving-up density and decreased their total food consumption under moonlight. On dark nights, rodents normally fed in the food patch, but when illumination was high they became central place foragers in large proportion. Moreover, the body weight of individuals decreased proportionately more during bright nights. These results strongly suggest that P. darwini uses the level of environmental illumination as a cue to the risk of being preyed upon and may sacrifice part of its energy return to avoid risky situations.
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Saisie sur NuitFrance par : |
Rosor |
Saisie sur NuitFrance en : |
Octobre 2017 |
Identifiant NuitFrance : |
NF-BIBLI-1657 |
Permalien de la fiche NuitFrance : |
http://www.nuitfrance.fr/?page=donneesdoc&partie=fiche-bibliographique&id_doc=1657 |
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