Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/23899
Title: Geometric morphometrics and ecological niche modelling for delimitation of near-sibling triatomine species
Authors: Gonçalves, R. Gurgel
Ferreira, J. B. C.
Rosa, A. F.
Bar, M. E.
Galvão, Cleber
Affilliation: Universidade de Brasília. Faculdade de Medicina. Laboratório de Parasitologia Médica e Biologia de Vetores. Brasília, DF, Brasil.
Universidade de Brasília. Faculdade de Medicina. Laboratório de Parasitologia Médica e Biologia de Vetores. Brasília, DF, Brasil / Universidade Católica de Brasília. Curso de Ciências Biológicas. Laboratório de Zoologia. Brasília, DF, Brasil
Universidade Católica de Brasília. Curso de Ciências Biológicas. Laboratório de Zoologia. Brasília, DF, Brasil
Universidad ´ Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales. Laboratorio de Artropodos. Corrientes, Argenttina.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos. Rio de Janeiro, RJ. Brasil.
Abstract: Identifying morphologically similar triatomine species is key to Chagas' disease vector control and surveillance, but remains challenging when only qualitative phenotypic data are available. We investigated whether morphometric and ecological variation can provide additional criteria for species delimitation by combining geometric morphometrics and ecological niche modelling to characterize two near-sibling triatomine species, Triatoma sordida and Triatoma garciabesi (Reduviidae: Triatominae). We analysed size and shape variation in 231 wings and 123 heads from one T. garciabesi and three T. sordida populations. Predicted distribution maps (21 climatic variables, 324 vector occurrence points) were produced using the Maxent method. Multivariate analyses summarized morphological and ecological variation. Wings and heads of T. sordida were significantly larger and more elongated than those of T. garciabesi. Discriminant analyses separated the species, with a partial overlap between Argentinean populations. The predicted distribution of T. garciabesi included northwest Argentina (mainly arid Chaco), whereas that of T. sordida included northeast Argentina (humid Chaco) and the Brazilian Cerrado and Caatinga ecoregions. Clear ecological niche differences were observed, with T. garciabesi occupying colder and drier areas than T. sordida. Our results show how morphometric variation and niche divergence can be used to enhance operational criteria for the delimitation of phenotypically similar triatomine species.
Keywords: Triatoma garciabesi
Triatoma sordida
ecological niche divergence
shape
size
keywords: Forma
Triatoma
Tamanho
divergência de nicho ecológico
Issue Date: 2011
Publisher: Wiley
Citation: GONÇALVES, R. Gurgel; et al. Geometric morphometrics and ecological niche modelling for delimitation of near-sibling triatomine species. Medical and Veterinary Entomology, v.25, p.84–93, 2011.
DOI: 10.1111/j.1365-2915.2010.00920.x
ISSN: 0269-283X
Copyright: restricted access
Appears in Collections:IOC - Artigos de Periódicos

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