Morphometric analysis of Triatoma dimidiata populations (Reduviidae: Triatominae) from Mexico and Northern Guatemala
Mem. Inst. Oswaldo Cruz
; 100(5): 477-486, Aug. 2005. ilus
Article
in English
| LILACS
| ID: lil-409964
Responsible library:
BR1.1
ABSTRACT
Triatoma dimidiata is one of the major vectors of Chagas disease in Latin America. Its range includes Mexico, all countries of Central America, Colombia, and Ecuador. In light of recent genetic analysis suggesting that the possible origin of this species is the Yucatan peninsula, we have analyzed populations from the state of Yucatan, San Luis Potosi, and Veracruz in Mexico, and a population from the southern region of the Yucatan peninsula located in Northern Guatemala, the region of El Peten. Classical morphometry including principal component, discriminant, sexual dimorphism, and wing asymmetry was analyzed. San Luis Potosi and Veracruz populations were indistinguishable while clearly separate from Yucatan and Peten populations. Despite important genetic differences, Yucatan and Peten populations were highly similar. Yucatan specimens were the smallest in size, while females were larger than males in all populations. Only head characters were necessary to distinguish population level differences, although wing fluctuating asymmetry was present in all populations. These results are discussed in light of recent findings suggesting genetic polymorphism in most populations of Triatoma dimidiata south of Chiapas to Ecuador.
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Triatoma
/
Wings, Animal
/
Insect Vectors
Limits:
Animals
Country/Region as subject:
Central America
/
Guatemala
/
Mexico
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2005
Document type:
Article
Affiliation country:
Guatemala
/
Mexico
Institution/Affiliation country:
Instituto Nacional de Salud Pública/MX
/
Secretaria de Salud del Estado de San Luis Potosi/MX
/
Secretaria de Salud del Estado de Veracruz/MX
/
Secretaria de Salud del Estado de Yucatan/MX
/
Universidad San Carlos/GT