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Abstract:

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.

Registro:

Documento: Artículo
Título:Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae)
Autor:Minoli, S.A.; Baraballe, S.; Lorenzo Figueiras, A.N.
Filiación:Institut de Recherche Sur la Biologie de l'Insecte, Université François Rabelais, Tours, France
Departamento de Biodiversidad Y Biología Experimental, Facultad de Ciencias Exactas Y Naturales, Pabellón II, C1428EHA Buenos Aires, Argentina
Palabras clave:Aggregation behaviour; Daily rhythm; Triatomines; Heteroptera; Hexapoda; Reduviidae; Triatoma infestans
Año:2007
Volumen:102
Número:4
Página de inicio:449
Página de fin:454
DOI: http://dx.doi.org/10.1590/S0074-02762007005000033
Título revista:Memorias do Instituto Oswaldo Cruz
Título revista abreviado:Mem. Inst. Oswaldo Cruz
ISSN:00740276
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00740276_v102_n4_p449_Minoli

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Citas:

---------- APA ----------
Minoli, S.A., Baraballe, S. & Lorenzo Figueiras, A.N. (2007) . Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae). Memorias do Instituto Oswaldo Cruz, 102(4), 449-454.
http://dx.doi.org/10.1590/S0074-02762007005000033
---------- CHICAGO ----------
Minoli, S.A., Baraballe, S., Lorenzo Figueiras, A.N. "Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae)" . Memorias do Instituto Oswaldo Cruz 102, no. 4 (2007) : 449-454.
http://dx.doi.org/10.1590/S0074-02762007005000033
---------- MLA ----------
Minoli, S.A., Baraballe, S., Lorenzo Figueiras, A.N. "Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae)" . Memorias do Instituto Oswaldo Cruz, vol. 102, no. 4, 2007, pp. 449-454.
http://dx.doi.org/10.1590/S0074-02762007005000033
---------- VANCOUVER ----------
Minoli, S.A., Baraballe, S., Lorenzo Figueiras, A.N. Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae). Mem. Inst. Oswaldo Cruz. 2007;102(4):449-454.
http://dx.doi.org/10.1590/S0074-02762007005000033