Geometric morphometric analysis of Colombian Anopheles albimanus (Diptera: Culicidae) reveals significant effect of environmental factors on wing traits and presence of a metapopulation

Giovan F. Gómez, Edna J. Márquez, Lina A. Gutiérrez, Jan E. Conn, Margarita M. Correa

Research output: Contribution to journalArticle in an indexed scientific journalpeer-review

60 Scopus citations

Abstract

Anopheles albimanus is a major malaria mosquito vector in Colombia. In the present study, wing variability (size and shape) in An. albimanus populations from Colombian Maracaibo and Chocó bio-geographical eco-regions and the relationship of these phenotypic traits with environmental factors were evaluated. Microsatellite and morphometric data facilitated a comparison of the genetic and phenetic structure of this species. Wing size was influenced by elevation and relative humidity, whereas wing shape was affected by these two variables and also by rainfall, latitude, temperature and eco-region. Significant differences in mean shape between populations and eco-regions were detected, but they were smaller than those at the intra-population level. Correct assignment based on wing shape was low at the population level (<58%) and only slightly higher (>70%) at the eco-regional level, supporting the low population structure inferred from microsatellite data. Wing size was similar among populations with no significant differences between eco-regions. Population relationships in the genetic tree did not agree with those from the morphometric data; however, both datasets consistently reinforced a panmictic population of An. albimanus. Overall, site-specific population differentiation is not strongly supported by wing traits or genotypic data. We hypothesize that the metapopulation structure of An. albimanus throughout these Colombian eco-regions is favoring plasticity in wing traits, a relevant characteristic of species living under variable environmental conditions and colonizing new habitats.

Original languageEnglish
Pages (from-to)75-85
Number of pages11
JournalActa Tropica
Volume135
Issue number1
DOIs
StatePublished - Jul 2014
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by Comité para el Desarrollo de la Investigación-CODI , Grant No. 8700-689 to MMC and Estrategia para la Sostenibilidad de Grupos 2013–2014, Universidad de Antioquia Grant No. E01719 . GFG received financial support for his doctoral studies from Departamento Administrativo de Ciencia, Tecnología e Innovación-COLCIENCIAS, Colombia , Concovatoria 511, 2010. We thank Nelson Naranjo at Laboratorio de Microbiologia Molecular-UdeA for microsatellite genotyping, Sara Bickersmith and William Lainhart at the Wadsworth Center's Griffin Laboratory for reading and critical comments on earlier versions of the manuscript. We are grateful to three anonymous reviewers that made valuable comments on the manuscript.

Keywords

  • Anopheles albimanus
  • Environment
  • Geometric morphometrics
  • Microevolution
  • Microsatellites
  • Phenotype

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