Artículo
Abstract:
Along a thermal gradient and under a LD 12:12 h cycle, nurse workers of the ant Camponotus mus select for the brood two different temperatures daily: 30.8°C at the middle of the light period (circadian phase = 90°), and 27.5°C 8 h later, during the dark period (CP = 210°). Brood-carrying activity proved to be self-sustained, running its two daily bursts free with a similar period of 23.5 h, under both LL and DD. The LD alternation acted as a strong Zeitgeber. A phase-delay of the LD 12:12 h cycle reset the overt rhythm at once, being both daily events locked-on to the delayed light: dark transition. However, changes in expression, non-occurrence, or even splitting of the two daily brood-carrying events during resetting depended on the phase of the delayed DL transition. By comparing the occurrence of activity with predictions based on a threshold curve of thermal sensitivity, results indicated that an immediate resetting of the involved pacemaker actually takes place. Nurse workers do not directly control the total time spent by the brood at the selected temperature. Instead, the endogenously-driven thermal sensitivity triggers their thermal-searching behavior at two critical times of the day, when environmental temperature is expected to reach its maximum and minimum. © 1995 Springer-Verlag.
Registro:
| Documento: | Artículo |
| Título: | Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus |
| Autor: | Roces, F. |
| Filiación: | Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, 1428, Argentina |
| Palabras clave: | Ant; Camponotus; Circadian rhythm; Temperature; Thermal sensitivity; Camponotus mus |
| Año: | 1995 |
| Volumen: | 177 |
| Número: | 5 |
| Página de inicio: | 637 |
| Página de fin: | 643 |
| DOI: | http://dx.doi.org/10.1007/BF00207192 |
| Título revista: | Journal of Comparative Physiology A |
| Título revista abreviado: | J Comp Physiol A |
| ISSN: | 03407594 |
| CODEN: | JCPAD |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v177_n5_p637_Roces |
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Citas:
---------- APA ----------
(1995) . Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus. Journal of Comparative Physiology A, 177(5), 637-643.http://dx.doi.org/10.1007/BF00207192
---------- CHICAGO ----------
Roces, F. "Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus" . Journal of Comparative Physiology A 177, no. 5 (1995) : 637-643.http://dx.doi.org/10.1007/BF00207192
---------- MLA ----------
Roces, F. "Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus" . Journal of Comparative Physiology A, vol. 177, no. 5, 1995, pp. 637-643.http://dx.doi.org/10.1007/BF00207192
---------- VANCOUVER ----------
Roces, F. Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus. J Comp Physiol A. 1995;177(5):637-643.http://dx.doi.org/10.1007/BF00207192
