IIBYT   23944
INSTITUTO DE INVESTIGACIONES BIOLOGICAS Y TECNOLOGICAS
Unidad Ejecutora - UE
artículos
Título:
Changes related to gender, geographic population and habitat in the antennal phenotype of Triatoma patagonica Del Ponte (Hemiptera: Reduviidae).
Autor/es:
RODRÍGUEZ CS, CROCCO L, ALTAMIRANO A Y CATALÁ S.
Revista:
ACTA TROPICA
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 125 p. 143 - 149
ISSN:
0001-706X
Resumen:
Triatomines undergo morphological changes as an adaptive response to
different habitats (wild, peridomestic, domestic, laboratory). The
characterization of the antennal phenotype provides information on
intraspecific variation caused by geographical origin and/or habitat.
Triatoma patagonica Del Ponte, 1929 is known to occur in peridomiciles
of rural areas in Argentina, where it also invades non-colonized
dwellings. Here we describe and compare the antennal phenotype of T.
patagonica in populations of different geographic origin, and explore
possible modifications induced by laboratory rearing with the aim of
investigating the range of phenotypic variation of the species for the
first time. Sixty antennas of adult males and females of T. patagonica
belonging to two peridomiciliary populations of different geographical
origin were analyzed. Four types of sensilla were observed in three
antennal segments, showing sexual dimorphism in the species. The
multivariate analysis separated the populations of similar habitat
(peridomicile) but different geographical origin, without showing
differences between the peridomiciliary and laboratory populations of
the same geographical origin. These results suggest phenotypicplasticity in T. patagonica, which would allow the species to adapt to a wide range of habitatswithout
having a close association with a given host and its environment. The
range of antennal phenotypic variation of T. patagonica would also be an
indicator of its current stage of adaptation to the human environment.