Phreatichthys andruzzii

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Phreatichthys andruzzii is a Höhlenfischart from the carp family (Cyprinidae ). It is the only species of the genus of Phreatichthys, and comes exclusively in cave waters under the oasis Bud - Bud ( type locality ) and in the radius of 30 km in central Somalia ago

Phreatichthys andruzzii is just over 6 inches long, is scaleless and blind.

It is the first discovered animal, which does not align its internal biological clock according to the sunlight. It lives after an unusually long " day " rhythm whose period can be up to 47 hours. This rhythm is insensitive to stimulation by light. Studies, however, that other external stimuli (eg, regular food supply ) could bring these fish to adjust their rhythm.

Swell

  • Cavallari, N.; Frigato, E.; Vallone, D.; Cheerful, N.; Lopez- Olmeda, JF, et al.: A Blind Circadian Clock in cavefish Reveals did opsin Mediate Peripheral Clock Photo Reception. In: PLoS Biology. 9, No. 9, 2011, doi: . 10.1371/journal.pbio.1001142.
  • Phreatichthys andruzzii on Fishbase.org (English)
  • Getahun, A.: Phreatichthys andruzzii (English) In: [ IUCN Red List of Threatened Species ] 2011 Red List of Threatened Species Version 2011.2. IUCN. , 2010. Accessed on 28 December 2011.
  • University of Ferrara: Orologi biologici in un pesce cieco. Le Scienze Web. Accessed on September 8, 2011.
  • Carp fish
  • Cyprinidae
Digital Object Identifier
648547
de