Behavior of triatomines (Hemiptera: Reduviidae) vectors of Chagas' disease: III. Influence of the number of matings on the fecundity and fertility of Panstrongylus megistus (Burm. 1835) in the laboratory

Abstract

A study of the effect of mating in the fecundity and fertility of females of P. megistus fed on pigeon blood every 14 days, was carried out in the laboratory. Two groups were constituted: I - females which mated only once; II - females which stayed always with the males. Only 56.7% of group I females laid fertile eggs, while as much as 90% of group II females laid fertile eggs. The duration of the fertile oviposition was greater in the females which stayed always with the males. Some females of this group were able to mate up to seven times throughout their life-span. This fact render useless sterile males in the control of these insects.

Efeitos de níveis de privação alimentar sobre a oogênese de Panstrongylus megistus

“…efeito sobre a atividade reprodutiva do macho, porém a deficiência de importantes fatores nutricionais do sangue pode influenciar na produção de ovos pelas fêmeas. Esse citado autor afirma que o número de Notes and Information Notas e Informações 3 Após esses períodos, todos os grupos foram alimentados a cada 15 dias. O grupo de controle foi formado por 15 casais alimentados no quinto dia após a ecdise imaginal e, depois, a cada 15 dias; todos os grupos receberam alimentação em pombo.…”

Influence of blood meal and mating in reproduction patterns of Triatoma brasiliensis females (Hemiptera: Reduviidae) under laboratory conditions

“…Our study also made an unexpected observation regarding mating in fed females. From the first studies of the triatomine reproduction, it has been stated that only one mating is enough for the triatomine female to maintain fertile eggs for her entire life-span (Neiva 1910, Lima et al 1987a, Pires et al 2004). However, we observed a much higher fertility rate and fecundity in multiple mated fed females compared to single mated fed females.…”

Triatomine Raubwanzen als Überträger der Chagas-Krankheit : Verbreitung und Vektor-Pathogen-Interaktion

“…Diese überdauern als Spermatozoen in der Spermatheca des Weibchens bis zu dessen Lebensende. Daher ist eine erneute Kopulation nicht nötig, Weibchen paaren sich jedoch trotzdem meist mehrmals mit verschiedenen Männchen (Lima et al 1987;Jurberg und Galvão 2006). Nach 10 bis 30 Tagen legt das Weibchen bis zu Die geschlüpften Nymphen ähneln bis auf das Fehlen der Flügel, der Ocelli und der Genitalien in ihrem Erscheinungsbild den adulten Tieren, sind jedoch deutlich kleiner.…”