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Centro de Investigaciones Biológicas del Noroeste (CIBNOR) 2011

Análisis Filogeográfico de Chaetodipus Siccus de la cuenca de los planes, B.C.S

Aguilera Miller, Eduardo Felipe

Titre : Análisis Filogeográfico de Chaetodipus Siccus de la cuenca de los planes, B.C.S

Auteur : Aguilera Miller, Eduardo Felipe

Etablissement de soutenance : Centro de Investigaciones Biológicas del Noroeste (CIBNOR)

Grade : Maestría en Ciencias en el Uso, Manejo y Preservación de los Recursos Naturales 2011

Résumé
The Chaetodipus siccus distribution is limited to the Cerralvo Island and the Los Planes Basin, the peninsular area in front to the island. Due to the existence of evidence, as a result to the molecular techniques applied on mitochondrial markers (Cyt b and COIII), it is possible to consider it as the first microendemic of the peninsula, which gives it certain importance from the conservation point of view. My hypothesis is that due to the existing link between different natural populations and the geological history of the area where they live, it is possible to identify relations between areas. Such is the case of the relation between the Cerralvo Island and the Los Planes Basin, which is unique in the Baja California Peninsula. For this reason, it is possible to expect minor gene divergency, shared haplotypes and common mutational events between the Chaetodipus siccus populations. The aim of this work is to determine the phylogeographic structure of C. siccus populations. The results suggest the existence of 43 haplotypes of Cyt b of C. siccus. Most of the haplotypes are limited to only one region (74.41%). We could identify three main haplogroups into the haplotypic network. The ancestral haplotypes are related to non-optimal ecological conditions sites for the species, while the most evolved haplotypes are associated to optimal conditions sites. We conclude C. siccus is a taxonomic valid species ; the population did not show phylogeographic structure as we expected.

Mots Clés : Chaetodipus siccus, Cuenca de Los Planes, filogeografía.

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