Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus

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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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Autor principal: Roces, F.
Formato: JOUR
Materias:
Ant
Camponotus
Circadian rhythm
Temperature
Thermal sensitivity
Camponotus mus
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03407594_v177_n5_p637_Roces
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03407594_v177_n5_p637_Roces
record_format dspace
spelling todo:paper_03407594_v177_n5_p637_Roces2023-10-03T15:25:53Z Variable thermal sensitivity as output of a circadian clock controlling the bimodal rhythm of temperature choice in the ant Camponotus mus Roces, F. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, F.
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.
format JOUR
author Roces, F.
author_facet Roces, F.
author_sort Roces, F.
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
url http://hdl.handle.net/20.500.12110/paper_03407594_v177_n5_p637_Roces
work_keys_str_mv AT rocesf variablethermalsensitivityasoutputofacircadianclockcontrollingthebimodalrhythmoftemperaturechoiceintheantcamponotusmus
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