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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/8012

Title: Dynamics of Evolution and Resistance to Starvation of Triatoma vitticeps   (Stal 1859) (Reduviidae: Triatominae), Submitted to Two Different Regimens of Food Deprivation
Authors: Moreira, Carlos José de Carvalho
Spata, Maria Celeste Dias
Keywords: Triatoma vitticeps   - life cycle - resistance in starvation - triatomine longevity - Brazil
Issue Date: 31-Dec-2002
Publisher: Fundação Oswaldo Cruz, Fiocruz
Citation: Memórias do Instituto Oswaldo Cruz (ISSN: 1678-8060) Vol 97 Num 7
Abstract: The resistance to starvation of Triatoma vitticeps   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.
URI: http://hdl.handle.net/1807/8012
Other Identifiers: http://www.bioline.org.br/abstract?id=oc02232
Rights: Copyright 2002 - Instituto Oswaldo Cruz - Fiocruz
Appears in Collections:Bioline International Legacy Collection

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