Different lines of evidence used to delimit species in ticks: A study of the South American populations of Amblyomma parvum (Acari: Ixodidae)

Authors
Nava, Santiago; Gerardi, Monize; Szabó, Matías P. J.; Mastropaolo, Mariano; Martins, Thiago F.; Labruna, Marcelo B.; Beati, Lorenza; Estrada Peña, Agustín; Guglielmone, Alberto Alejandro
Publication Year
2016
Language
English
Format
article
Status
Published version
Description
The goal of this work was to combine different lines of evidence besides that of molecular markers to delimit species in ticks when the molecular data are not totally congruent. Two groups (Argentina, Brazil) of South American populations of Amblyomma parvum were compared to test whether the splitting of these two lineages suggested by genetic analyses is complete. Comparative studies of reproductive compatibility, morphological analyses of fixed characters, and comparison of population distributions in spatially defined ecological niches were performed.The morphological comparisons of both discrete and morphometric characters showed no differences among A. parvum ticks from Argentina and Brazil. The intercrosses and backcrosses showed evidence of pre- and post-zygotic compatibility between the two groups. No significant differences in environmental traits were found which would justify the separation of the records of A. parvum in distinct groups. Although the gene flow between the two groups of populations is limited, the absence of reproductive barriers, the lack of significant morphological differences, and the absence of significant differences in the niche preferences indicate that populations of A. parvum from Argentina and Brazil should be treated as a single species. The speciation conjectures suggested by some analyses of mitochondrial DNA sequences were not supported when different lines of evidences were compared.
Fil: Nava, Santiago. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina
Fil: Gerardi, Monize. Universidade Federal de Uberlandia; Brasil
Fil: Szabó, Matías P. J.. Universidade Federal de Uberlandia; Brasil
Fil: Mastropaolo, Mariano. Universidad Nacional del Litoral. Facultad de Ciencias Veterinarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Martins, Thiago F.. Universidade de Sao Paulo; Brasil
Fil: Labruna, Marcelo B.. Universidade de Sao Paulo; Brasil
Fil: Beati, Lorenza. Georgia Southern University; Estados Unidos
Fil: Estrada Peña, Agustín. Universidad de Zaragoza; España
Fil: Guglielmone, Alberto Alejandro. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina
Subject
AMBLYOMMA PARVUM
IXODIDAE
SOUTH AMERICA
SPECIES DELIMITATION
Otras Ciencias Veterinarias
Ciencias Veterinarias
CIENCIAS AGRÍCOLAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/69056