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Abstract:

Triatoma infestans is the main vector of the Chagas disease in Latin America. These nocturnal bugs spend most of the daylight hours aggregated with conspecifics inside crevices in roofs and walls. Around the entrances of the shelters T. infestans deposits faeces that contain chemical cues that attract conspecifics. In this work we investigated whether attraction to faeces can be modulated by experience in this insect species. First, we analyzed if the attraction of nymphs to faeces is innate or acquired through previous sensory experiences. Results show that after hatching, 1st instar nymphs are attracted to faeces even if they had never been in contact with them before, thus indicating that this attraction is innate. Second, we studied if attraction to faeces can be influenced by the presence of con-specifics. No differences were found in the attraction to faeces of nymphs released alone or in groups, suggesting that attraction to faeces is independent of the presence of other individuals. Third, we examined if the innate response to faeces of nymphs can be modulated by experience. After pre-exposing nymphs to faeces during 24 h, insects were no longer attracted to faeces. Finally, by pairing the presence of faeces with an aversive mechanical disturbance, nymphs switched from attraction to avoidance of faeces. These results show that although faeces attraction has a strong innate component, it can be modulated by experience. The learning and memory capacities of triatomines have been studied only recently, and our work is the first report on the effects of experience in the aggregation context. © 2016 Elsevier Ltd

Registro:

Documento: Artículo
Título:Experience-dependent modulation of the attraction to faeces in the kissing bug Triatoma infestans
Autor:Mengoni, S.L.; Lorenzo-Figueiras, A.N.; Minoli, S.A.
Filiación:DBBE Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, IBBEA, CONICET–UBA, Buenos Aires, 1428, Argentina
Palabras clave:Aggregation; Faeces; Learning; Plasticity; Triatoma infestans; aggregation behavior; attractant; Chagas disease; chemical cue; conspecific; developmental stage; disease vector; feces; innate behavior; insect; learning; phenotypic plasticity; Latin America; Hexapoda; Triatoma infestans; Triatominae; animal; association; chemistry; chemotaxis; feces; growth, development and aging; learning; memory; nymph; physiology; Triatoma; Animals; Chemotaxis; Cues; Feces; Learning; Memory; Nymph; Triatoma
Año:2017
Volumen:98
Página de inicio:23
Página de fin:28
DOI: http://dx.doi.org/10.1016/j.jinsphys.2016.10.018
Título revista:Journal of Insect Physiology
Título revista abreviado:J. Insect Physiol.
ISSN:00221910
CODEN:JIPHA
Registro:http://digital.bl.fcen.uba.ar/collection/paper/document/paper_00221910_v98_n_p23_Mengoni

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Citas:

---------- APA ----------
Mengoni, S.L., Lorenzo-Figueiras, A.N. & Minoli, S.A. (2017) . Experience-dependent modulation of the attraction to faeces in the kissing bug Triatoma infestans. Journal of Insect Physiology, 98, 23-28.
http://dx.doi.org/10.1016/j.jinsphys.2016.10.018
---------- CHICAGO ----------
Mengoni, S.L., Lorenzo-Figueiras, A.N., Minoli, S.A. "Experience-dependent modulation of the attraction to faeces in the kissing bug Triatoma infestans" . Journal of Insect Physiology 98 (2017) : 23-28.
http://dx.doi.org/10.1016/j.jinsphys.2016.10.018
---------- MLA ----------
Mengoni, S.L., Lorenzo-Figueiras, A.N., Minoli, S.A. "Experience-dependent modulation of the attraction to faeces in the kissing bug Triatoma infestans" . Journal of Insect Physiology, vol. 98, 2017, pp. 23-28.
http://dx.doi.org/10.1016/j.jinsphys.2016.10.018
---------- VANCOUVER ----------
Mengoni, S.L., Lorenzo-Figueiras, A.N., Minoli, S.A. Experience-dependent modulation of the attraction to faeces in the kissing bug Triatoma infestans. J. Insect Physiol. 2017;98:23-28.
http://dx.doi.org/10.1016/j.jinsphys.2016.10.018