Invasive North American Beaver (Castor canadensis): The distribution of mitochondrial variation across the Archipelago of Tierra del Fuego

FASANELLA MARIANA; POLJAK SEBASTIÁN; LIZARRALDE MARTA SUSANA

MASTOZOOLOGí­A NEOTROPICAL

UNIDAD DE ZOOLOGÍA Y ECOLOGÍA ANIMAL, INSTITUTO ARGENTINO DE INVESTIGACIÓN DE LAS ZONAS ARIDAS, CRICYT, CONICET

Año: 2010 vol. 17 p. 43 - 52

0327-9383

In 1946 twenty-five pairs of Castor canadensis were introduced into the Isla Grande of Tierra del Fuego (Argentina). Thanks both to environmental conditions favorable for colonization and an absence of effective control measures, today the estimated abundance is about 100,000 individuals. We have conducted molecular analysis of beavers from three areas of the Archipelago of Tierra del Fuego, in order to characterize the genetic structure of the invasive population. Our results from AMOVA (Fst=0.104,p