Estudo do ciclo evolutivo do Rhodnius nasutus stal, 1859, em laboratório

Abstract

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Population Biology of Rhodnius domesticus Neiva & Pinto, 1923 (Hemiptera: Reduviidae) under Laboratory Conditions

“…Mortality declined during the nymphal development stage, following a similar pattern to that observed in R. nasutus (Soares et al 1995) and R. pictipes (Rocha et al 1994). In the youngest nymphs, mortality appeared to be mainly due to an incapacity to feed, since dead bugs were generally without significant intestinal contents.…”

“…Under similar conditions, Jurberg and Rangel (1984) observed a mean development time of 358 days for R. pallescens. Soares et al (1995) veri- Eggs Pairs fied a mean development time of 209.4 days for R. nasutus fed weekly on chickens, and Rocha et al (1994) found a mean development time of 278 days for R. pictipes fed fortnightly on pigeons and maintained at 28°C and 80% rh. Egg hatching rates in Rhodnius species also vary.…”

“…Egg hatching rates in Rhodnius species also vary. They are generally above 80% (Szumlewicz 1975, Sherlock 1979 although lower average hatch rates of 53.3% and 64.9% have been recorded in established colonies of R. nasutus (Soares et al 1995) and R. pictipes (Rocha et al 1994) respectively. The 57% eclosion rate shown here may reflect the declining fertility of old females, since this variable was not controlled.…”

Bioactivity of the latex from Parahancornia amapa (Apocynaceae) on the development of Rhodnius nasutus (Hemiptera, Reduviidae, Triatominae) under laboratory conditions

“…The statistical program used to analyze the data was GraphPad InStat. The results were analyzed by ANOVA and the means were compared with the Tukey-Kramer test (Sokal & Rohlf 1979).…”

“…This species could be considered of secondary importance in the transmission of Trypanosoma cruzi Chagas, 1909(Alencar 1987. In studies conducted in Piauí, several authors have found that R. nasutus is a typical wild triatomine that colonizes natural ecotypes such as birds' nests and palm trees, mainly the babaçu (Orbignya marti) and carnaúba (Copernicia cerifera) and is less abundant in artificial ecotypes (Soares et al 1995). According to Lima & Sarquis (2007), the deforestation of carnaúba for raising cattle and agricultural development is diminishing the wild areas for this species, and thus this insect is being found in peri-urban environments.…”