Biology of three species of North American Triatominae (Hemiptera: Reduviidae: Triatominae) fed on rabbits

Memórias do Instituto Oswaldo Cruz

José Alejandro Martínez-ibarra²  Ricardo Alejandre-aguilar¹  Edgar Paredes-gonzález¹  Miguel Alejandro Martínez-silva²  Miriam Solorio-cibrián²  Benjamín Nogueda-torres¹  Francisco Trujillo-contreras²  Mónica Novelo-lópez² 

[1] ,Universidad de Guadalajara Centro Universitario del Sur Jalisco,México

关键词: North America;    Triatominae;    biology;    laboratory conditions;   

DOI  :  10.1590/S0074-02762007000800006

来源: SciELO

【 摘 要 】

Aspects related to hatching, lifetime, number of blood meals for molting, mortality, feeding time, and postfeeding defecation delay were evaluated and compared in each instar of three North American Triatominae: Triatoma gerstaeckeri, Triatoma lecticularia and Triatoma protracta, all of them fed on rabbits. No significant differences (p > 0.05) were found among the three species regarding mean hatching rate, which was close to 20 days. Egg-to-adult development times were significantly shorter (p < 0.05) for T. lecticularia. Number of blood meals for molting to next instar ranged from one to five for T. protracta, and from one to six for T. gerstaeckeri and T. lecticularia. Mortality rates were higher in younger nymphs of T. lecticularia and T. protracta, while rates in T. gerstaeckeri were higher in fifth-instar nymphs. Mean feeding time was longest in T. gerstaeckeri, followed by T. lecticularia. More than twice the number of T. gerstaeckeri nymphs completed the development process, if compared to the nymphs from the other two species. Defecation delay was less than 10 min for T. lecticularia, T. protracta and the youngest nymphs of T. gerstaeckeri. Results point out that these three species may be important potential vectors of Trypanosoma cruzi for human populations, in areas of Mexico where these species are currently present.

【 授权许可】

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