Chronobiological basis of thermopreference in the haematophagous bug Triatoma infestans

The chronobiological basis of the daily dynamics of thermopreference was tested in adults of Triatoma infestans, continuously registering the preferred temperature of insects released over a temperature gradient for 13 days. We found that the thermopreference in T. infestans is a dynamic process tha...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Minoli, S.A., Lazzari, C.R.
Formato: JOUR
Materias:
Behaviour
Chagas disease
Rhythms
Temperature
Triatominae
behavior
diurnal activity
temperature
Hemiptera
Hexapoda
Reduviidae
Triatoma
Triatoma infestans
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00221910_v49_n10_p927_Minoli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00221910_v49_n10_p927_Minoli
record_format dspace
spelling todo:paper_00221910_v49_n10_p927_Minoli2023-10-03T14:28:13Z Chronobiological basis of thermopreference in the haematophagous bug Triatoma infestans Minoli, S.A. Lazzari, C.R. Behaviour Chagas disease Rhythms Temperature Triatominae behavior diurnal activity temperature Hemiptera Hexapoda Reduviidae Triatoma Triatoma infestans Triatominae The chronobiological basis of the daily dynamics of thermopreference was tested in adults of Triatoma infestans, continuously registering the preferred temperature of insects released over a temperature gradient for 13 days. We found that the thermopreference in T. infestans is a dynamic process that depends on the time of the day and the post-feeding time. When submitted to a 12:12 h light/darkness cycle (L/D), the preferred temperature reached the highest and the lowest values at the end of the light and dark phases, respectively. This daily rhythm persisted under constant conditions of illumination (D/D and L/L), suggesting the existence of an internal oscillator controlling this behaviour. Statistical analysis revealed that the thermopreference of insects kept under L/D exhibited a ca. 24 h periodicity, while insects kept in D/D and L/L showed free-running periods of τ (D/D) = 23.35 and τ(L/L) = 27.35 h, respectively. The persistence of a cyclic pattern of thermopreference under constant conditions, and free-running periods, close to, but different from 24 h, demonstrate the existence of an endogenous control of the thermopreference in this species. The biological relevance of these results is discussed in the light of the hypothesis that both the length of time elapsed since feeding and the time of the day modify thermopreference in these bugs. The gradual decline in preferred temperature following feeding may be associated with energy conservation during starvation. The rhythmic modulation of thermopreference may be associated with the daily rhythm of locomotion activity shown by these bugs. © 2003 Elsevier Ltd. All rights reserved. Fil:Minoli, S.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lazzari, C.R. 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_00221910_v49_n10_p927_Minoli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Behaviour
Chagas disease
Rhythms
Temperature
Triatominae
behavior
diurnal activity
temperature
Hemiptera
Hexapoda
Reduviidae
Triatoma
Triatoma infestans
Triatominae
spellingShingle Behaviour
Chagas disease
Rhythms
Temperature
Triatominae
behavior
diurnal activity
temperature
Hemiptera
Hexapoda
Reduviidae
Triatoma
Triatoma infestans
Triatominae
Minoli, S.A.
Lazzari, C.R.
Chronobiological basis of thermopreference in the haematophagous bug Triatoma infestans
topic_facet Behaviour
Chagas disease
Rhythms
Temperature
Triatominae
behavior
diurnal activity
temperature
Hemiptera
Hexapoda
Reduviidae
Triatoma
Triatoma infestans
Triatominae
description The chronobiological basis of the daily dynamics of thermopreference was tested in adults of Triatoma infestans, continuously registering the preferred temperature of insects released over a temperature gradient for 13 days. We found that the thermopreference in T. infestans is a dynamic process that depends on the time of the day and the post-feeding time. When submitted to a 12:12 h light/darkness cycle (L/D), the preferred temperature reached the highest and the lowest values at the end of the light and dark phases, respectively. This daily rhythm persisted under constant conditions of illumination (D/D and L/L), suggesting the existence of an internal oscillator controlling this behaviour. Statistical analysis revealed that the thermopreference of insects kept under L/D exhibited a ca. 24 h periodicity, while insects kept in D/D and L/L showed free-running periods of τ (D/D) = 23.35 and τ(L/L) = 27.35 h, respectively. The persistence of a cyclic pattern of thermopreference under constant conditions, and free-running periods, close to, but different from 24 h, demonstrate the existence of an endogenous control of the thermopreference in this species. The biological relevance of these results is discussed in the light of the hypothesis that both the length of time elapsed since feeding and the time of the day modify thermopreference in these bugs. The gradual decline in preferred temperature following feeding may be associated with energy conservation during starvation. The rhythmic modulation of thermopreference may be associated with the daily rhythm of locomotion activity shown by these bugs. © 2003 Elsevier Ltd. All rights reserved.
format JOUR
author Minoli, S.A.
Lazzari, C.R.
author_facet Minoli, S.A.
Lazzari, C.R.
author_sort Minoli, S.A.
title Chronobiological basis of thermopreference in the haematophagous bug Triatoma infestans
title_short Chronobiological basis of thermopreference in the haematophagous bug Triatoma infestans
title_full Chronobiological basis of thermopreference in the haematophagous bug Triatoma infestans
title_fullStr Chronobiological basis of thermopreference in the haematophagous bug Triatoma infestans
title_full_unstemmed Chronobiological basis of thermopreference in the haematophagous bug Triatoma infestans
title_sort chronobiological basis of thermopreference in the haematophagous bug triatoma infestans
url http://hdl.handle.net/20.500.12110/paper_00221910_v49_n10_p927_Minoli
work_keys_str_mv AT minolisa chronobiologicalbasisofthermopreferenceinthehaematophagousbugtriatomainfestans
AT lazzaricr chronobiologicalbasisofthermopreferenceinthehaematophagousbugtriatomainfestans
_version_ 1782025063992655872

Ejemplares similares