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LIFE CYCLE AND REPRODUCTIVE PATTERNS OF TRIATOMA RUBROFASCIATA (DE GEER, 1773) (HEMIPTERA: REDUVIIDAE), UNDER LABORATORY CONDITIONS
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Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia e Controle de Insetos Vetores. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Biologia. Laboratório de Educação Ambiental e em Saúde. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia e Controle de Insetos Vetores. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Biologia. Laboratório de Educação Ambiental e em Saúde. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia e Controle de Insetos Vetores. Rio de Janeiro, RJ, Brasil.
Abstract
The life cycle and reproductive patterns of Triatoma rubrofasciata were studied along with laboratory conditions for the establishment of a prolific colony. The insects were divided into four groups: two of them were maintained at room temperature (20.5 degrees C to 33 degrees C and 85% +/- 5% of relative humidity), the other two in a climatic chamber (CC) (temperature: 29 degrees C, humidity: 80% +/- 5%). The groups were fed weekly or fortnightly on Swiss mice. The females from the group kept in the CC and fed weekly had longer life span, as well as a higher number of eggs, fertile eggs and hatchings; the group kept in the CC and fed fortnightly had a shorter life span for the 1st, 2nd and 3rd instars and a lower mortality rate for all instars. It was concluded that a constant high temperature (CC at 29 degrees C) is the most suitable condition for the maintenance of a colony of T. rubrofasciata regardless of the interval between repasts.
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