Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae)

Triatomine bugs show a temporal modulation of many activities. Here, we analyse the daily modulation of the aggregation behaviour of Triatoma infestans larvae and its chronobiological basis. In the laboratory, groups of six bugs were released over an experimental arena during six consecutive days, w...

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Autores principales: Minoli, Sebastián A., Lorenzo Figueiras, Alicia Nieves
Publicado: 2007
Materias:
Aggregation behaviour
Daily rhythm
Triatomines
Heteroptera
Hexapoda
Reduviidae
Triatoma infestans
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00740276_v102_n4_p449_Minoli
http://hdl.handle.net/20.500.12110/paper_00740276_v102_n4_p449_Minoli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00740276_v102_n4_p449_Minoli
record_format dspace
spelling paper:paper_00740276_v102_n4_p449_Minoli2023-06-08T15:06:47Z Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae) Minoli, Sebastián A. Lorenzo Figueiras, Alicia Nieves Aggregation behaviour Daily rhythm Triatomines Heteroptera Hexapoda Reduviidae Triatoma infestans Triatomine bugs show a temporal modulation of many activities. Here, we analyse the daily modulation of the aggregation behaviour of Triatoma infestans larvae and its chronobiological basis. In the laboratory, groups of six bugs were released over an experimental arena during six consecutive days, where their aggregation behaviour was quantified every hour. When submitted to a 12/12 h photoperiod (L/D), the larvae of T. infestans exhibited a cyclic pattern of aggregation with a 24 h period, evincing the existence of a daily rhythm of aggregation in this species. Bugs exhibited the maximum aggregation tendency at the end of the scotophase (7:00 h), moment in which they naturally search for refuges. The minimum aggregation (i.e. maximal dispersion) was observed during the last part of the photophase and beginning of the scotophase (15:00 to 1:00 h). This cyclic pattern disappeared when constant conditions of illumination (L/L) or darkness (D/D) were imposed to the bugs, suggesting the absence of an endogenous circadian control of this behaviour. Insects submitted to L/L and D/D photoperiods presented lower global levels of aggregation than those submitted to L/D conditions. The lack of an endogenous control and the relevance of light cycles as a synchronization signal are discussed as the temporal modulation of this behaviour might play an important role in the nocturnal habits of this species. Fil:Minoli, S.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lorenzo Figueiras, A.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00740276_v102_n4_p449_Minoli http://hdl.handle.net/20.500.12110/paper_00740276_v102_n4_p449_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 Aggregation behaviour
Daily rhythm
Triatomines
Heteroptera
Hexapoda
Reduviidae
Triatoma infestans
spellingShingle Aggregation behaviour
Daily rhythm
Triatomines
Heteroptera
Hexapoda
Reduviidae
Triatoma infestans
Minoli, Sebastián A.
Lorenzo Figueiras, Alicia Nieves
Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae)
topic_facet Aggregation behaviour
Daily rhythm
Triatomines
Heteroptera
Hexapoda
Reduviidae
Triatoma infestans
description Triatomine bugs show a temporal modulation of many activities. Here, we analyse the daily modulation of the aggregation behaviour of Triatoma infestans larvae and its chronobiological basis. In the laboratory, groups of six bugs were released over an experimental arena during six consecutive days, where their aggregation behaviour was quantified every hour. When submitted to a 12/12 h photoperiod (L/D), the larvae of T. infestans exhibited a cyclic pattern of aggregation with a 24 h period, evincing the existence of a daily rhythm of aggregation in this species. Bugs exhibited the maximum aggregation tendency at the end of the scotophase (7:00 h), moment in which they naturally search for refuges. The minimum aggregation (i.e. maximal dispersion) was observed during the last part of the photophase and beginning of the scotophase (15:00 to 1:00 h). This cyclic pattern disappeared when constant conditions of illumination (L/L) or darkness (D/D) were imposed to the bugs, suggesting the absence of an endogenous circadian control of this behaviour. Insects submitted to L/L and D/D photoperiods presented lower global levels of aggregation than those submitted to L/D conditions. The lack of an endogenous control and the relevance of light cycles as a synchronization signal are discussed as the temporal modulation of this behaviour might play an important role in the nocturnal habits of this species.
author Minoli, Sebastián A.
Lorenzo Figueiras, Alicia Nieves
author_facet Minoli, Sebastián A.
Lorenzo Figueiras, Alicia Nieves
author_sort Minoli, Sebastián A.
title Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae)
title_short Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae)
title_full Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae)
title_fullStr Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae)
title_full_unstemmed Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae)
title_sort daily rhythm of aggregation in the haematophagous bug triatoma infestans (heteroptera: reduviidae)
publishDate 2007
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00740276_v102_n4_p449_Minoli
http://hdl.handle.net/20.500.12110/paper_00740276_v102_n4_p449_Minoli
work_keys_str_mv AT minolisebastiana dailyrhythmofaggregationinthehaematophagousbugtriatomainfestansheteropterareduviidae
AT lorenzofigueirasalicianieves dailyrhythmofaggregationinthehaematophagousbugtriatomainfestansheteropterareduviidae
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