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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 102, No. 8, 2007, pp. 925-930
Bioline Code: oc07167
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 102, No. 8, 2007, pp. 925-930

 en Biology of three species of North American Triatominae (Hemiptera: Reduviidae: Triatominae) fed on rabbits
Martínez-Ibarra, José Alejandro; Alejandre-Aguilar, Ricardo; Paredes-González, Edgar; Martínez-Silva, Miguel Alejandro; Solorio-Cibrián, Miriam; Nogueda-Torres, Benjamín; Trujillo-Contreras, Francisco & Novelo-López, Mónica

Abstract

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 check for this species in other resources , Triatoma lecticularia check for this species in other resources and Triatoma protracta check for this species in other resources , 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 check for this species in other resources for human populations, in areas of Mexico where these species are currently present.

Keywords
North America - Triatominae -biology - laboratory conditions

 
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