Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus
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 pr...
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1995
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paper:paper_03407594_v177_n5_p637_Roces2023-06-08T15:34:12Z Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus Roces, Flavio Ant Camponotus Circadian rhythm Temperature Thermal sensitivity Camponotus mus 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. Fil:Roces, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1995 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v177_n5_p637_Roces http://hdl.handle.net/20.500.12110/paper_03407594_v177_n5_p637_Roces |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Ant Camponotus Circadian rhythm Temperature Thermal sensitivity Camponotus mus |
| spellingShingle |
Ant Camponotus Circadian rhythm Temperature Thermal sensitivity Camponotus mus Roces, Flavio Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus |
| topic_facet |
Ant Camponotus Circadian rhythm Temperature Thermal sensitivity Camponotus mus |
| description |
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. |
| author |
Roces, Flavio |
| author_facet |
Roces, Flavio |
| author_sort |
Roces, Flavio |
| title |
Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus |
| title_short |
Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus |
| title_full |
Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus |
| title_fullStr |
Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus |
| title_full_unstemmed |
Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus |
| title_sort |
variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant camponotus mus |
| publishDate |
1995 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v177_n5_p637_Roces http://hdl.handle.net/20.500.12110/paper_03407594_v177_n5_p637_Roces |
| work_keys_str_mv |
AT rocesflavio variablethermalsensitivityasoutputofacircadianclockcontrollingthebimodalrhythmoftemperaturechoiceintheantcamponotusmus |
| _version_ |
1768543470521155584 |