Head geometric morphometrics of two Chagas disease vectors from Venezuela  

作　　者：Ana Maria Oropeza Carlos Arturo Perri Fernanndez Jonathan Liria Ana Soto-Vivas 

机构地区：[1]Escuela de Bioanalisis, Facultad de Cieneias de la Salud, Universidad de Carabobo, Venezuela [2]Universidad Regional Amazonica IKIAM, km 7 via Muyuna, Ecuador [3]Centro de Esmdios en Zoologla Aplicada, Facultad Experimental de Ciencias y Tecnologla, Universidad de Carabobo, Venezuela [4]Centro de Estudios de Enfermedades Endkmicas y Salud Ambiental,Institeto de Alto Estudios "Dr. Arnoldo Gabladon ", Venezuela [5]Carrera de Cs. Biologicas y Ambientales, Facultad de Ciencias Biologicas, Universidad Central del Ecuador, Ecuador

出　　处：《Zoological Systematics》2017年第1期65-70,共6页动物分类学报（英文版）

基　　金：supported by the Servicio Autónomo Instituto de Altos Estudios en Salud Pública “Dr:Arnoldo Gabaldon” (IAES) Aragua,Venezuela

摘　　要：Triatominae species are considered the main vectors of Chagas disease or American Trypanosomiasis. In Venezuela, the principal vectors are Rhodnius prolixus （Stal, 1959） and Triatoma maculata （Erichson, 1848）, which are belonged to the tribe Rhodniini and Triatomini, respectively. The head conformation and size development of these species can reflect ontogenetic changes which contribute with the vectors biology studies, as well to support of instars determination. The goal of the paper is to the application of geometric morphometric techniques for describing head conformation and size of instars of these species. We photographed 140 heads in R. prolixus： First instar （I： 16）, second instar （II： 17）, third instar （III： 18）, fourth instar （IV： 21）, fifth instar （V： 21）, adult female （F： 26） and adult males （M： 21）; in T. maculata heads of 136 specimens were photographed,I： 20, II： 17, III： 26, IV： 15, V： 19, F： 20 and M： 19. Landmark coordinate （x, y） configurations were registered and aligned by Generalized Procrustes Analysis. Covariance Analyses were implemented with proportions of re-classified groups and MANOVA. Statistical analyses of variance found not significant differences in head isometric size （Kruskal-Wallis） among IV and V instars in both species. The a posteriori re-classification was almost perfect in R. prolixus （82%） and T. maculata （86%）; the main head differences occurs in antenniferous tubercles, postocular and preocular. Our study using quantitative tools for describing the shape differences contributes to explain the morphology variability and development of Chagas disease vectors.Triatominae species are considered the main vectors of Chagas disease or American Trypanosomiasis. In Venezuela, the principal vectors are Rhodnius prolixus （Stal, 1959） and Triatoma maculata （Erichson, 1848）, which are belonged to the tribe Rhodniini and Triatomini, respectively. The head conformation and size development of these species can reflect ontogenetic changes which contribute with the vectors biology studies, as well to support of instars determination. The goal of the paper is to the application of geometric morphometric techniques for describing head conformation and size of instars of these species. We photographed 140 heads in R. prolixus： First instar （I： 16）, second instar （II： 17）, third instar （III： 18）, fourth instar （IV： 21）, fifth instar （V： 21）, adult female （F： 26） and adult males （M： 21）; in T. maculata heads of 136 specimens were photographed,I： 20, II： 17, III： 26, IV： 15, V： 19, F： 20 and M： 19. Landmark coordinate （x, y） configurations were registered and aligned by Generalized Procrustes Analysis. Covariance Analyses were implemented with proportions of re-classified groups and MANOVA. Statistical analyses of variance found not significant differences in head isometric size （Kruskal-Wallis） among IV and V instars in both species. The a posteriori re-classification was almost perfect in R. prolixus （82%） and T. maculata （86%）; the main head differences occurs in antenniferous tubercles, postocular and preocular. Our study using quantitative tools for describing the shape differences contributes to explain the morphology variability and development of Chagas disease vectors.

关 键 词：INSTARS Rhodniini Triatomini CONFORMATION centroid size. 

分 类 号：Q[生物学]