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FEMALE ODOURS PROMOTE THE ACTIVATION OF SHELTERED KISSING BUG RHODNIUS PROLIXUS MALES AND MODULATE THEIR ORIENTATION
locomotor activity
metasternal glands
sex pheromone
shelter
Afiliación
Fundação Oswaldo Cruz. Instituto Rene Rachou. Laboratorio de Triatomíneos e Epidemiologia da Doenca de Chagas Belo Horizonte, MG, Brasil / Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Laboratorio de Fisiología de Insectos. Buenos Aires, Argentina
Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Laboratorio de Fisiología de Insectos. Buenos Aires, Argentina
Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Laboratorio de Fisiología de Insectos. Buenos Aires, Argentina
Fundação Oswaldo Cruz. Instituto Rene Rachou. Laboratorio de Triatomíneos e Epidemiologia da Doenca de Chagas Belo Horizonte, MG, Brasil
Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Laboratorio de Fisiología de Insectos. Buenos Aires, Argentina
Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Laboratorio de Fisiología de Insectos. Buenos Aires, Argentina
Fundação Oswaldo Cruz. Instituto Rene Rachou. Laboratorio de Triatomíneos e Epidemiologia da Doenca de Chagas Belo Horizonte, MG, Brasil
Resumen en ingles
The existence of a pheromone emitted during copulation has been reported for Rhodnius prolixus (Hemiptera: Reduviidae) Stål. Adults possess one pair of metasternal glands (MGs) from which female R. prolixus release volatiles mainly at night. We investigated whether these volatiles emitted by adult R. prolixus can modulate sexual-related behaviours of opposite and/or same sex individuals. We first used a shelter bioassay to test if adult activity patterns can be affected by chemical signals emitted by opposite sex conspecifics. We observed that males left the shelter more frequently in the presence of females, showing higher activity and an increase of intrasexual copulation attempts. Females showed no shelter-related activation in the presence of male odours. Second, we used a locomotion compensator device to investigate whether females or males show oriented responses to odours emitted by adults. We found that males oriented towards air currents carrying female odours but females did not orient towards odours emitted by adults. Finally, we observed that males oriented towards the female MG compounds. Thus, a volatile chemical signal emitted by females from their MGs promoted the activation of sheltered males and modulated orientation to air currents.
Palabras clave en ingles
Chemical signalslocomotor activity
metasternal glands
sex pheromone
shelter
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