Abstract

ESPINOZA, Jorge et al. Reproductive biology of two populations of Triatoma infestans (Hemiptera: Reduviidae) under laboratory conditions. Gac Med Bol [online]. 2011, vol.34, n.2, pp.66-70. ISSN 1012-2966.

Objectives: in the present study, we documented the reproductive biology of two populations of T. infestans, from the mesothermic Andean Valleys (20 de Octubre) and the Chaco Serrano (Mataral) in laboratory conditions. Methods: there was used 15 pairs of T. infestans populations (Mataral and 20 de Octubre). The control population was colonies of T. infestans from laboratory. The insects were fed on chickens for 45 minutes and kept in a climate chamber at 28 ± 3 ° C, 60 ± 5%. The following parameters and rates were calculated: Fecundity, Fertility, oviposition index (IO), fertility index (FI). Results: it was observed that the T. infestans strain from 20 de Octubre locality, presented the greatest number of eggs per day, with a daily fecundity average rate of (1.95 ± 1.5), a fertility of 95.6% (IO) averaged 0.43 (IF) average of 0.9. Statistical analysis shown that the 20 de octubre locality, presented significant values between variables of number of eggs and the weight of triatomines with a ratio of R2 = 0.77 and a significant Pearson correlation. Conclusions: under laboratory conditions two different populations of T. infestans coming from different regions of Bolivia, shown different patterns of fecundity and fertility, these data are of valuable importance to be considered by vector control programs, since showed that the life cycle of the same vector species may vary according to geographical area, therefore, is very important to continue with studies that describe and help to understand the biology of the main vector species in Bolivia.

Keywords : triatoma infestans; fecundity; fertility; Chagas disease.

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