Abstract
The Pacific tree frog, Hyla regilla, is known to display a great deal of intraspecies variation and occupy diverse habitats. Temperature, rainfall, and altitude following Bergmann's rule and Allen's rule were suggested as selective forces which might be related to the morphological variation. Frogs from seven localities along a transect across southern California were collected and ten morphological measurements were made. Eight weather variables were chosen and measured. Discriminant analysis showed the populations differed significantly from one another in size, p < .001. Canonical correlation was used to determine which of the measurements in the two domains contributed to
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