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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 92, No. 4, 1997, pp. 553-558
Bioline Code: oc97100
Full paper language: Portuguese
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 92, No. 4, 1997, pp. 553-558

 en Development of Rhodnius pictipes Stal, 1872 Fed on Mice and through a Silicone Membrane (Hemiptera, Reduviidae, Triatominae)
Dayse da Silva Rocha; Adivaldo Henrique da Fonseca; Francisco Ademar Costa; Jose Jurberg & Cleber Galvao

Abstract

Development of Rhodnius pictipes Stal, 1872 Fed on Mice and through a Silicone Membrane (Hemiptera, Reduviidae, Triatominae) - Rhodnius pictipes (Hemiptera, Reduviidae) from Serra Norte, State of Para, Brazil, aclimatized in an insectary at the Laboratorio Nacional e Internacional de Referencia em Taxonomia de Triatomineos, Departamento de Entomologia, Instituto Oswaldo Cruz, were fed through a silicone membrane. In order to know the viability and the efficiency of this membrane compared with insects fed on mice, the number of bloodmeals taken, period of development of the five nymphal instars, longevity of adults, average amount of blood intake in each meal and percent of mortality were observed. A total of 310 insects, were used, comprising 50 nymphs of each instar, as well as 30 male and 30 female adults. Insects fed artificially had reduced minimal and maximal periods of development than the group fed on mice. The largest relative increase of body weight was observed in the 2nd instar followed by the 1st, and the amount of blood ingested increased during the development, to the 5th instar for both groups. There were no significant differences between the groups fed artificially and in vivo according to Tukey's test for p>0.05. The percent of mortality in the 1st instar was 18% for artificially fed and 16% for the group fed on mice; these percentages decreased as insects developed until the 4th instar, without mortality, returning to increase in the 5th instar. R. pictipes was shown to be easily adaptable to artificial feeding, and could be considered as an important and viable experimental model.

 
 pt Desenvolvimento de Rhodnius pictipes Stal, 1872 alimentado atraves de membrana de silicone e em camundongos (Hemiptera, Reduviidae, Triatominae)
Dayse da Silva Rocha; Adivaldo Henrique da Fonseca; Francisco Ademar Costa; Jose Jurberg & Cleber Galvao

 
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