Artículos de revistas
Comparative study on free-running locomotor activity circadian rhythms in Brazilian subterranean fishes with different degrees of specialization to the hypogean life (Teleostei: Siluriformes; Characiformes)
Fecha
2009Registro en:
BIOLOGICAL RHYTHM RESEARCH, v.40, n.6, p.477-489, 2009
0929-1016
10.1080/09291010902731205
Autor
TRAJANO, E.
CARVALHO, M. R.
DUARTE, L.
MENNA-BARRETO, L.
Institución
Resumen
In this paper we report findings on the presence of circadian rhythms in six species of cave-dwelling fishes from Brazil. Locomotor activity of islolated individuals was automatically recorded for 10 consecutive days under constant darkness. The species tested show varied degrees of specialization to subterranean life and we found varying degrees of the circadian components of locomotor activity as measured by the periodogram algorhythm of Lomb-Scargle. Both the presence and robustness of the circadian components seem to vary according to the degree of specialization to subterranean life, the more specialized, the less circadian rhythmicity was detected.