Schachter-Broide J., Gurtler R. E., Kitron U., Dujardin Jean-Pierre. (2009). Temporal variations of wing size and shape of Triatoma infestans (Hemiptera : Reduviidae) populations from Northwestern Argentina using geometric morphometry. Journal of Medical Entomology, 46 (5), p. 994-1000. ISSN 0022-2585.
Titre du document
Temporal variations of wing size and shape of Triatoma infestans (Hemiptera : Reduviidae) populations from Northwestern Argentina using geometric morphometry
Schachter-Broide J., Gurtler R. E., Kitron U., Dujardin Jean-Pierre
Source
Journal of Medical Entomology, 2009,
46 (5), p. 994-1000 ISSN 0022-2585
Wing geometric morphometry of Triatoma infestans (Klug) (Hemiptera: Reduviidae) populations in northwestern Argentina showed that individual collection sites represent the discrete unit where metric differentiation took place. Here we Studied temporal variations in wing size and shape of T. infestans Populations from defined capture sites on three occasions between 2000 and 2003. Bugs collected front domiciles and/or storerooms had significantly larger right-wing centroid size than bugs collected at goat and/or pig corrals by the end of summer 2000 for both sexes. Conversely, male bugs collected front domiciles and/or storerooms had significantly smaller centroid size than bugs collected from pig corrals in spring 2002. The inversion in wing centroid size between seasons was consistent between sexes. Wing shape analysis from the south-central extreme of the Study village showed divergence between collection dates for both sexes. Wing shape divergence was highly significant between male bugs collected by the end of summer 2000 and those collected in spring 2002 and by the end of summer 2003. For females, wing shape divergence was marginally significant between the end Of Summer 2000 and spring 2002, and significant between spring 2002 and the end of summer 2003. Unlike season-related variations in wing centroid size, shape differentiation wits related to the time period elapsed between sample collections and Suggested genetic influences acting on shape. Simultaneous consideration of wing size and shape provided complementary information on the direction and timing of bug dispersal. Morphological studies may allow determining the degree of relatedness of different bug populations and to associate morphological heterogeneity with temporal patterns of reinfestation.
