Noireau François auteur aut IRD Gutierrez T. auteur aut IRD Flores R. auteur aut IRD Brenière Simone Frédérique auteur aut IRD Bosseno Marie-France auteur aut IRD Wisnivesky-Colli C. auteur aut IRD text journalArticle eng text/pdf reformatted digital access Triatoma guasayana and two putative cryptic species pertaining to T. sordida complex (named groups 1 and 2) occur in sympatry in the Bolivian Chaco. Using multilocus enzyme electrophoresis and subsequent genetic analysis, our work assesses their population distribution and dispersal capacity in domestic, peridomestic, and silvatic environments. Our collections by light trap in the silvatic environment indicated a predominance of T. guasayana and T. sordida group 2 and a lesser abundance of T. sordida group 1 (less than or equal to 10% of the total of captures). Their similar distribution in two silvatic areas 80 km apart supports the hypothesis of their homogeneous dispersal through the Bolivian Chaco. The distribution of T. guasayana and T. sordida groups 1 and 2 was similar between silvatic environment and peridomestic ecotopes where 25% of positive places were occupied by two or three species. Bromeliads were confirmed as favorable shelter for T. guasayana but were free of T. sordida. T. sordida group 1 and to a lesser extent T. guasayana would be more invasive vectors for houses than T. sordida group 2. The spatial partition in the three species sampled in two distant sites suggested a reduced dispersive capacity. (Résumé d'auteur) specialized INSECTE NUISIBLE VECTEUR STRUCTURE DE POPULATION DISTRIBUTION SPATIALE GENETIQUE DE POPULATION ANALYSE GENETIQUE ELECTROPHORESE ISOENZYME ZONE FORESTIERE BOLIVIE 052GLOTRY01 94 4 451-457 1999 0074-0276 https://www.documentation.ird.fr/hor/fdi:010018672 0074-0276 [F B010018672] https://www.documentation.ird.fr/hor/fdi:010018672 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/b_fdi_49-50/010018672.pdf IRD - Base Horizon / Pleins textes 1999-08-18 2020-08-03 fdi:010018672 fre