Naturwissenschaften

, Volume 91, Issue 12, pp 585–588 | Cite as

Retinal cryptochrome in a migratory passerine bird: a possible transducer for the avian magnetic compass

  • Andrea Möller
  • Sven Sagasser
  • Wolfgang Wiltschko
  • Bernd Schierwater
Short Communication

Abstract

The currently discussed model of magnetoreception in birds proposes that the direction of the magnetic field is perceived by radical-pair processes in specialized photoreceptors, with cryptochromes suggested as potential candidate molecules mediating magnetic compass information. Behavioral studies have shown that magnetic compass orientation takes place in the eye and requires light from the blue-green part of the spectrum. Cryptochromes are known to absorb in the same spectral range. Because of this we searched for cryptochrome (CRY) in the retina of European robins, Erithacus rubecula, passerine birds that migrate at night. Here, we report three individually expressed cryptochromes, eCRY1a, eCRY1b, and eCRY2. While eCRY1a and eCRY2 are similar to the cryptochromes found in the retina of the domestic chicken, eCRY1b has a unique carboxy (C)-terminal. In light of the ‘radical-pair’ model, our findings support a potential role of cryptochromes as transducers for the perception of magnetic compass information in birds.

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Andrea Möller
    • 1
  • Sven Sagasser
    • 2
  • Wolfgang Wiltschko
    • 1
  • Bernd Schierwater
    • 2
  1. 1.Zoologisches Institut, Fachbereich Biologie und InformatikJ.W. Goethe UniversitätFrankfurt am MainGermany
  2. 2.Institut für Tierökologie und ZellbiologieTierärztliche Hochschule HannoverHannoverGermany

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