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Document " Thermal correlates of foraging-site selection by Chinese pit-vipers (Gloydius shedaoensis, Viperidae) "
Type de document : |
Articles de revue scientifique |
Thème du document : |
Nuit naturelle - Sens et orientation du vivant |
Groupe biologique : |
Reptiles |
Auteur(s) : |
SHINE R. SUN L.X. KEARNEY M. FITZGERALD M.
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Date de publication : |
Octobre 2002 |
Langue : |
English/Anglais |
Nom du périodique : |
Journal of Thermal Biology |
Précisions : |
Volume 27. Numéro 5. Pages 405-412 |
Lien contenu/source : |
http://www.sciencedirect.com/science/article/pii/S... |
DOI : |
10.1016/S0306-4565(02)00009-8 |
Mots-clefs : |
Ambush Ectothermy Infrared receptors Predation Prey detection Snake Thermoregulation
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Citation courte : |
Shine et al. (2002) |
Citation complète (format NuitFrance) : |
SHINE R., SUN L.X., KEARNEY M. & FITZGERALD M. (2002). Thermal correlates of foraging-site selection by Chinese pit-vipers (Gloydius shedaoensis, Viperidae). Journal of Thermal Biology. Volume 27. Numéro 5. Pages 405-412. |
Résumé du document : |
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1. Do thermal factors influence foraging-site selection by ectothermic predators? Snake species that obtain their prey from ambush must remain immobile for long periods, precluding overt behavioural thermoregulation; and some “ambush” snakes use thermal cues to detect endothermic prey. Plausibly, alternative ambush sites might differ either in equilibrial body temperatures available to snakes, or in the thermal “background” against which prey items must be detected.
2. We examined this topic with field data on pit-vipers (Gloydius shedaoensis) on a small island in northeastern China. Adult snakes feed only on migrating passerine birds. The snakes ambush birds both from arboreal perches (branches of small trees) and from the ground.
3. Arboreal versus terrestrial ambush sites differed both in operative temperatures and thermal “backgrounds” available to the snakes. Operative temperatures inside copper models were lower in trees than on the ground (because of wind), and snakes in arboreal ambush sites were cooler than those in terrestrial sites. Thermal backgrounds from arboreal perches were cooler (and thus, provided more contrast against prey items) than did backgrounds available from terrestrial ambush-sites.
4. Thermal factors thus modify the suitability of alternative ambush locations for these pit-vipers, but with a trade-off: a snake in a tree can “see” its prey more clearly, but may not be warm enough (and hence, able to strike fast enough) to capture it. Further work is required to determine whether or not snakes actually use such thermal differences as criteria for the selection of ambush sites.
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Saisie sur NuitFrance par : |
Rosor |
Saisie sur NuitFrance en : |
Octobre 2017 |
Identifiant NuitFrance : |
NF-BIBLI-1724 |
Permalien de la fiche NuitFrance : |
http://www.nuitfrance.fr/?page=donneesdoc&partie=fiche-bibliographique&id_doc=1724 |
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