Triatoma vitticeps check for this species in other resources - life cycle - resistance in starvation - triatomine longevity - Brazil"/>
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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 97, No. 7, 2002, pp. 1049-1055
Bioline Code: oc02232
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 97, No. 7, 2002, pp. 1049-1055

 en Dynamics of Evolution and Resistance to Starvation of Triatoma vitticeps check for this species in other resources (Stal 1859) (Reduviidae: Triatominae), Submitted to Two Different Regimens of Food Deprivation
Carlos José de Carvalho Moreira & Maria Celeste Dias Spata

Abstract

The resistance to starvation of Triatoma vitticeps check for this species in other resources has been analyzed comparatively, according to different regimens of food deprivation under laboratory conditions. One cohort, composed of 100 specimens of each evolutionary nymphal stage, was submitted to continuous fasting until death; the second group, arranged in the same way, was fed once on chicken. Through this work, it was possible not only to compare the results obtained from the first group with other authors' results but, also, to analyze the dynamics of evolution, molting, longevity and the increase in insect longevity, in the second group. The average values recorded for survival time revealed statistical differences between the two groups. Among the important results detected, there is one that deserves to be emphasized: the incredible increase in longevity among insects that received only one feed – an average increase in survival time that reached 2.95 to 3.30 times in nymphs of 3rd and 4th stages, respectively. One 5th stage nymph survived for up to 350 days and the females may triplicate their survival rate, what represents an important epidemiological factor. The knowledge about this type of biological characteristic of T. vitticeps may contribute to prevent the domiciliation of this species, what seems to be incipient in some municipal districts, in Brazil.

Keywords
Triatoma vitticeps check for this species in other resources - life cycle - resistance in starvation - triatomine longevity - Brazil

 
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