Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Journal of Mammalogy, 82(2):302319, 2001 EVOLUTIONARY GENETICS AND PLEISTOCENE BIOGEOGRAPHY
 

Summary: 302
Journal of Mammalogy, 82(2):302319, 2001
EVOLUTIONARY GENETICS AND PLEISTOCENE BIOGEOGRAPHY
OF NORTH AMERICAN TREE SQUIRRELS (TAMIASCIURUS)
BRIAN S. ARBOGAST,* ROBERT A. BROWNE, AND PETER D. WEIGL
Department of Biology, Wake Forest University, Winston-Salem, NC 27109
Present address of BSA: Burke Museum of Natural History and Culture and
Department of Zoology, University of Washington, Seattle, WA 98195-3010
Nucleotide sequence data from the mitochondrial DNA (mtDNA) cytochrome-b gene and
allozymic data were used to infer the evolutionary and biogeographic histories of New
World tree squirrels of the genus Tamiasciurus. Phylogenetic analyses of the cytochrome-
b data support the existence of 3 mtDNA lineages within Tamiasciurus: a western lineage
consisting of populations of T. douglasii from western British Columbia (Canada), Wash-
ington, Oregon, and California, and T. mearnsi from northern Baja California (Mexico); a
southwestern lineage consisting of populations of T. hudsonicus from New Mexico and
Arizona; and a geographically widespread lineage comprising populations of T. hudsonicus
from the remainder of the species' range. Levels of mtDNA sequence variation observed
within and among populations of Tamiasciurus were small (02.4%), suggesting that con-
temporary geographic patterns of genetic variation in Tamiasciurus have been established
relatively recently (i.e., in the Late Pleistocene). Allozyme analyses also support a close

  

Source: Arbogast, Brian - Department of Biological Sciences, University of North Carolina at Wilmington

 

Collections: Environmental Sciences and Ecology