Geographic variation in length of tail of white-footed mice (Peromyscus leucopus) in Kansas
Article Abstract:
Lengths of body and ear in white-footed mice (Peromyscus leucopus) in Kansas exhibited no pattern of geographic variation. Little if any geographic variation occurs in the hindfoot size of P. leucopus. Tail size increased significantly from east to west and south to north, and tail size is significantly greater in the northwestern portion of Kansas than in the southeastern part. Because of the established link between tail length and climbing ability, the geographical pattern shows that P. leucopus in western and northwestern Kansas are more highly adapted for arboreal locomotion.
Publication Name: Journal of Mammalogy
Subject: Zoology and wildlife conservation
ISSN: 0022-2372
Year: 1992
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Geographic variation in pine marten (Martes martes) and beech marten (M. foina) in Europe
Article Abstract:
The distribution range of Martes martes in Europe show a uniform increase in skull size from north to south, and the size variation of M. foina follows an east-west trend of size decrease. Variability in M. foina is larger than that found in M. martes. Morphologic comparison between species in sympatric and allopatric samples show that there is no character displacement between species. Phylogenetic and ecologic differences appear to be the main reasons for distinct patterns of geographic variation found in the two species despite their strong morphologic similarities.
Publication Name: Journal of Mammalogy
Subject: Zoology and wildlife conservation
ISSN: 0022-2372
Year: 1992
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Speciation and persistence of a contact zone in Mojave Desert ground squirrels, subgenus Xerospermophilus
Article Abstract:
A common boundary exists between Spermophilus mohavensis and S. tereticaudus (Mojave ground squirrels), both of the subgenus Xerospermophilus. This contact boundary is in a small, isolated desert refugium in northwestern Mojave Desert. No large degree of genetic intergradation either at or near the contact zone is indicated from cranial morphometrics. Longevity of species contact boundary is attributed to low vagility, incorporation of rare immigrants from the alternate species via introgressive hybridization and competition, or a combination of these factors.
Publication Name: Journal of Mammalogy
Subject: Zoology and wildlife conservation
ISSN: 0022-2372
Year: 1992
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