Meny

Javascript verkar inte påslaget? - Vissa delar av Lunds universitets webbplats fungerar inte optimalt utan javascript, kontrollera din webbläsares inställningar.
Du är här

Nocturnal colour vision in geckos

Författare:
Publiceringsår: 2004
Språk: Engelska
Sidor: S485-S487
Publikation/Tidskrift/Serie: Proceedings of the Royal Society B: Biological Sciences. Biology Letters
Volym: 271
Nummer: Suppl. 6
Dokumenttyp: Artikel
Förlag: Royal Society

Sammanfattning

Nocturnal animals are said to sacrifice colour vision in favour of increased absolute sensitivity. This is true for most vertebrates that possess a dual retina with a single type of rod for colour-blind night vision and multiple types of cone for diurnal colour vision. However, among the nocturnal vertebrates, geckos are unusual because they have no rods but three cone types. Here, we show that geckos use their cones for colour vision in dim light. Two specimens of the nocturnal helmet gecko Tarentola (formerly Geckonia) chazaliae were able to discriminate blue from grey patterns by colour alone. Experiments were performed at 0.002 cd m(-2), a light intensity similar to dim moonlight. We conclude that nocturnal geckos can use cone-based colour vision at very dim light levels when humans rely on colour-blind rod vision.

Disputation

Nyckelord

  • Biology and Life Sciences
  • nocturnal vision
  • colour vision
  • gecko
  • cones

Övriga

Published
Yes
  • Lund Vision Group
  • ISSN: 0962-8452

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen