Desenvolvimento de Rhodnius pictipes Stal, 1872 alimentado atraves de membrana de silicone e em camundongos (Hemiptera, Reduviidae, Triatominae) / Development of Rhodnius pictipes Stal, 1872 fed on mice and through a silicone membrane (Hemiptera, Reduviidae, Triatominae)
Rocha, Dayse da Silva; Fonseca, Adivaldo Henrique da; Costa, Francisco Ademar; Jurberg, Jose; Galvao, Cleber.
Mem. Inst. Oswaldo Cruz
; 92(4): 553-8, July-Aug. 1997. tab
Artigo
em Português
| LILACS | ID: lil-193165
Rhodnius pictipes (Hemiptera, Reduviidae) from Serra Norte, State of Para, Brazil, aclimatizes 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 goups. 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 per cent for artificially fed and 16 per cent 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.
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