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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 " Vision in the nocturnal wandering spider Leucorchestris arenicola (Araneae: Sparassidae) "
Type de document : |
Articles de revue scientifique |
Thème du document : |
Nuit naturelle - Sens et orientation du vivant |
Groupe biologique : |
Invertébrés terrestres |
Auteur(s) : |
NORGAARD T. NILSSON D.E. HENSCHEL J.R. GARM A. WEHNER R.
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Date de publication : |
2008 |
Langue : |
English/Anglais |
Nom du périodique : |
Rue89 |
Précisions : |
Volume 211. Pages 816-823 |
Lien contenu/source : |
http://jeb.biologists.org/content/211/5/816 |
DOI : |
10.1242/jeb.010546 |
Mots-clefs : |
Electroretinogram Nocturnal navigation Spectral sensitivity Spider navigation Temporal summation Visual field
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Citation courte : |
Norgaard et al. (2008) |
Citation complète (format NuitFrance) : |
NORGAARD T., NILSSON D.E., HENSCHEL J.R., GARM A. & WEHNER R. (2008). Vision in the nocturnal wandering spider Leucorchestris arenicola (Araneae: Sparassidae). Rue89. Volume 211. Pages 816-823. |
Résumé du document : |
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At night the Namib Desert spider Leucorchestris arenicola performs long-distance homing across its sand dune habitat. By disabling all or pairs of the spiders' eight eyes we found that homing ability was severely reduced when vision was fully abolished. Vision, therefore, seems to play a key role in the nocturnal navigational performances of L. arenicola. After excluding two or three pairs of eyes, the spiders were found to be able to navigate successfully using only their lateral eyes or only their anterior median eyes. Measurement of the eyes' visual fields showed that the secondary eyes combined have a near full (panoramic) view of the surroundings. The visual fields of the principal eyes overlap almost completely with those of the anterior lateral eyes. Electroretinogram recordings indicate that each eye type contains a single photopigment with sensitivity peaking at ?525 nm in the posterior and anteriomedian eyes, and at ?540 nm in the anteriolateral eyes. Theoretical calculations of photon catches showed that the eyes are likely to employ a combination of spatial and temporal pooling in order to function at night. Under starlit conditions, the raw spatial and temporal resolution of the eyes is insufficient for detecting any visual information on structures in the landscape, and bright stars would be the only objects visible to the spiders. However, by summation in space and time, the spiders can rescue enough vision to detect coarse landscape structures. We show that L. arenicola spiders are likely to be using temporal summation to navigate at night.
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Saisie sur NuitFrance par : |
Rosor |
Saisie sur NuitFrance en : |
Mars 2016 |
Identifiant NuitFrance : |
NF-BIBLI-1458 |
Permalien de la fiche NuitFrance : |
http://www.nuitfrance.fr/?page=donneesdoc&partie=fiche-bibliographique&id_doc=1458 |
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