Size and skeletal variation in male bank vole along an altitudinal gradient in western Norway

Abstract

Abstract Size showed significant differences along the altitude gradient, and the largest bank voles Clethrionomys glareolus (Schreber, 1780), were found at an intermediate altitude where density also peaked. Individual skeletal variants did not show any uniform pattern of variation, but the overall estimate of divergence increased successively from sea level to treeline.