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Titolo:
Locomotor activity of the fiddler crab, Uca subcylindrica (Stimpson), under artificial illumination
Autore:
Thurman, CL; Broghammer, AM;
Indirizzi:
Univ No Iowa, Dept Biol, Cedar Falls, IA 50614 USA Univ No Iowa Cedar Falls IA USA 50614 ept Biol, Cedar Falls, IA 50614 USA
Titolo Testata:
BIOLOGICAL RHYTHM RESEARCH
fascicolo: 1, volume: 32, anno: 2001,
pagine: 85 - 99
SICI:
0929-1016(200102)32:1<85:LAOTFC>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
TIDAL RHYTHMS; SOUTH TEXAS; CRUSTACEANS; CYCLES;
Keywords:
fiddler crabs; Uca subcylindrica; locomotor rhythm; circadian;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Thurman, CL Univ No Iowa, Dept Biol, Cedar Falls, IA 50614 USA Univ No Iowa Cedar Falls IA USA 50614 dar Falls, IA 50614 USA
Citazione:
C.L. Thurman e A.M. Broghammer, "Locomotor activity of the fiddler crab, Uca subcylindrica (Stimpson), under artificial illumination", BIOL RH RES, 32(1), 2001, pp. 85-99

Abstract

Specimens of the fiddler crab Uca subcylindrica (Stimpson) were captured in south Texas (USA) for locomotor rhythm studies. Actographic data were analyzed using Tau(TM) sofware. Under constant illumination (LL) and darkness (DD), the semiterrestrial crabs express a circadian rhythm of locomotion. When exposed to illumination/darkness cycles (LD12:12 or LD14:10), their bouts of activity are entrained to the photoperiod. In LD, activity is generally bimodal with an initial burst about 0.5 h after illumination. A second burst of activity begins 1 to 2 h before the end of illumination. When transferred from LD to LL, a locomotor rhythm with an average period of 24.6 +/-1.0 h (n = 19) is expressed in 89 percent of the crabs. On the other hand,when placed in DD after LD (n = 8), the crabs are either arrythmic or weakly rhythmic (period = 23.8 +/- 0.2 h; n = 2). If the onset of illumination is advanced by 6 h, a period of loss than 24.0 h is detected in the actogram. If the onset of illumination is delayed by 6 h, a locomotor rhythm with a period greater than 24.0 h appears. The locomotor behavior of this species of fiddler crab, Uca subcylindrica, is not related to the tidal rhythmicities seen in other members of the genus Uca. Rather, it has strong circadian components.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 14:24:51