Keywords
fecundity
oviposition
biology
breeding laboratory
How to Cite
Abstract
The aim of this study was to evaluate the possibility of maintenance of fecundity and the
capability of oviposition in Reduviid bugs after decades of breeding under laboratory conditions. It was
observed the performance of eleven colonies of Triatoma infestans from the Laboratory of Triatomines of
Adolfo Lutz Institute. Insects were mated in different ratio of males and females. Two rhythms of alimentation
were used. In the first, triatomines were fed weekly, and in the second rhythm the meal were offered every
fifteen or twenty one days. During all the study teals were used as blood source, and temperature and
humidity were constant, at 27-28°C and 70-80%, respectivelly. The results confirm the importance of the
rhythm of alimentation for oviposition. Insects fed weekley showed the best rates of oviposition, it was
represented by number of eggs by female per day (efd), between 0.39 to 4.40 efd, being more frequent up
to 1.30 efd. Colonies that were fed every fifteen or twenty one days showed inexpressives rates of
oviposition, between 0.05 to 1.07 efd, being more frequent below to 0.30efd. It was concluded that after
decades of breeding under laboratory conditions it is possible to maintain the fecundity, into normal
patterns, in the T. infestans if the rhythm of alimentation of adults dont exceed seven days. Rhythm of
alimentation dont affected the survival rates of adults, but it was critical for the fecundity and oviposition.
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Copyright (c) 2001 Instituto Adolfo Lutz Journal
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