Du är här

Vision in the dimmest habitats on Earth

Författare:
Publiceringsår: 2004
Språk: Engelska
Sidor: 765-789
Publikation/Tidskrift/Serie: Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology
Volym: 190
Nummer: 10
Dokumenttyp: Artikel
Förlag: Springer Berlin / Heidelberg

Sammanfattning

A very large proportion of the world's animal species are active in dim light, either under the cover of night or in the depths of the sea. The worlds they see can be dim and extended, with light reaching the eyes from all directions at once, or they can be composed of bright point sources, like the multitudes of stars seen in a clear night sky or the rare sparks of bioluminescence that are visible in the deep sea. The eye designs of nocturnal and deep-sea animals have evolved in response to these two very different types of habitats, being optimised for maximum sensitivity to extended scenes, or to point sources, or to both. After describing the many visual adaptations that have evolved across the animal kingdom for maximising sensitivity to extended and point-source scenes, I then use case studies from the recent literature to show how these adaptations have endowed nocturnal animals with excellent vision. Nocturnal animals can see colour and negotiate dimly illuminated obstacles during flight. They can also navigate using learned terrestrial landmarks, the constellations of stars or the dim pattern of polarised light formed around the moon. The conclusion from these studies is clear: nocturnal habitats are just as rich in visual details as diurnal habitats are, and nocturnal animals have evolved visual systems capable of exploiting them. The same is certainly true of deep-sea animals, as future research will no doubt reveal.

Disputation

Nyckelord

  • Biology and Life Sciences
  • compound eye
  • camera eye
  • nocturnal vision
  • deep-sea vision
  • visual
  • ecology

Övriga

Published
Yes
  • Lund Vision Group
  • ISSN: 0340-7594

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