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Titolo:
The sensory basis of rheotaxis in the blind Mexican cave fish, Astyanax fasciatus
Autore:
Baker, CF; Montgomery, JC;
Indirizzi:
Univ Auckland, Sch Biol Sci, Expt Biol Res Grp, Auckland 1, New Zealand Univ Auckland Auckland New Zealand 1 ol Res Grp, Auckland 1, New Zealand
Titolo Testata:
JOURNAL OF COMPARATIVE PHYSIOLOGY A-SENSORY NEURAL AND BEHAVIORAL PHYSIOLOGY
fascicolo: 5, volume: 184, anno: 1999,
pagine: 519 - 527
SICI:
0340-7594(199905)184:5<519:TSBORI>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANTARCTIC NOTOTHENIOID FISH; ATLANTIC SALMON SMOLTS; FRESH-WATER FISH; LATERAL-LINE; SUPERFICIAL NEUROMASTS; SALAR L; TRACKING;
Keywords:
lateral line; rheotaxis; olfactory; cave fish;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Baker, CF Univ Auckland, Sch Biol Sci, Expt Biol Res Grp, Private Bag 92019, Auckland 1, New Zealand Univ Auckland Private Bag 92019 Auckland New Zealand 1 Zealand
Citazione:
C.F. Baker e J.C. Montgomery, "The sensory basis of rheotaxis in the blind Mexican cave fish, Astyanax fasciatus", J COMP PH A, 184(5), 1999, pp. 519-527

Abstract

The sensory basis of rheotaxis (orientation to currents) was investigated in the blind Mexican cave fish, Astyanax fasciatus. An unconditioned rheotactic response to uniform velocity flows was exhibited, with a threshold of less than 3 cm s(-1). Disabling the entire lateral line or the superficial neuromast receptor class increased the rheotactic threshold to greater than9 cm s(-1) A pharmacological block of the lateral line canal system alone had no effect. These results demonstrate that the superficial lateral line system controls rheotaxis at low current velocities. The effect of pairing an odor stimulant with the water current dropped the rheotactic threshold to less than 0.4 cm s(-1). This study provides a clear behavioral role for the superficial neuromasts where none previously existed, and also establishes a link between the mechanosensory lateral line and olfactory systems in the olfactory search behavior of the cave fish.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 22:30:58