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DYNAMICS OF EVOLUTION AND RESISTANCE TO STARVATION OF TRIATOMA VITTICEPS (STAL 1859) (REDUVIIDAE: TRIATOMINAE), SUBMITTED TO TWO DIFFERENT REGIMENS OF FOOD DEPRIVATION
Ciclo de vida
Resistência na fome
Longevidade de triatomina
Brasil
Life cycle
Resistance in starvation
Triatomine longevity
Brazil
Afiliación
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Medicina Tropical. Laboratório de Doenças Parasitárias.Núcleo de Interação Trypanosoma cruzi-Vetores da Doença de Chagas. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Medicina Tropical. Laboratório de Doenças Parasitárias.Núcleo de Interação Trypanosoma cruzi-Vetores da Doença de Chagas. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Medicina Tropical. Laboratório de Doenças Parasitárias.Núcleo de Interação Trypanosoma cruzi-Vetores da Doença de Chagas. Rio de Janeiro, RJ, Brasil.
Resumen en ingles
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.
Palabras clave en portugues
Triatoma vitticepsCiclo de vida
Resistência na fome
Longevidade de triatomina
Brasil
Palabras clave en ingles
Triatoma vitticepsLife cycle
Resistance in starvation
Triatomine longevity
Brazil
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