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Geographic Representation of Morphologic Variation Among Populations of Ascaphus truei Stejneger
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Geographic Representation of Morphologic Variation Among Populations of Ascaphus truei Stejneger

著者： Robert J Pauken; Dean E Metter
版本/格式： 文章 文章 : 英语
刊登在：Systematic Zoology, Dec., 1971, vol. 20, no. 4, p. 434-441
数据库：JSTOR
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文件类型： 文章
所有的著者/提供者： Robert J Pauken; Dean E Metter
ISSN:0039-7989
OCLC号码： 484911600
语言注释： English
注意： Fig. 1.-Northwestern United States, hachures indicate general range of Ascaphus (after Metter and Pauken, 1969). Shaded areas show the distribution of cool, needleleaf evergreen forests (after Küchler, 1964).
Fig. 3.-Northwestern United States showing distribution of intensity of morphologic variation in Ascaphus depicted by contours. (a) Males, the line separating the shaded and unshaded areas connects all points on the map where the ${\rm D}^{2}$ values are equal to 27. Those contours in the shaded areas are less and those in the unshaded are greater than 27. (b) Females, shaded areas indicate ${\rm D}^{2}$ values less than 18, contour interval is 9. (c) Larvae, shaded areas indicate ${\rm D}^{2}$ values less than 9, contour interval is 9.
Fig. 3.-Northwestern United States showing distribution of intensity of morphologic variation in Ascaphus depicted by contours. (a) Males, the line separating the shaded and unshaded areas connects all points on the map where the ${\rm D}^{2}$ values are equal to 27. Those contours in the shaded areas are less and those in the unshaded are greater than 27. (b) Females, shaded areas indicate ${\rm D}^{2}$ values less than 18, contour interval is 9. (c) Larvae, shaded areas indicate ${\rm D}^{2}$ values less than 9, contour interval is 9.
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摘要：

Multivariate statistical distance and computer mapping techniques are used to determine and display changes in the intensity of morphologic variation between populations of Ascaphus truei, the ribbed frog, in the northwestern United States. The resulting maps can be interpreted on the basis of ancient distribution patterns, avenues of gene flow, and environmental adaptations. Factor analysis is used to depict interrelationships among the measured morphologic characters.

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