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A Darwinian Interpretation of Hindlimb Variability in Frog Populations

Stanley N. Salthe and Martha L. Crump
Evolution
Vol. 31, No. 4 (Dec., 1977), pp. 737-749
DOI: 10.2307/2407436
Stable URL: http://www.jstor.org/stable/2407436
Page Count: 13
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A Darwinian Interpretation of Hindlimb Variability in Frog Populations
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Abstract

The intrinsic variability of traits proposed by previous authors as being important in frog locomotion was compared with the intrinsic variability of other hindlimb traits and was found to be more or less significantly less variable. This indicates more intense recent selection upon the former. In non-jumpers, Atelopus, the ratio femur:tibfib is not less variable than other traits, as it is in a jumper, Acris. A new ratio (foot:tibfib) is suggested as being of importance in both styles of locomotion. The ratio tarsus length:snoutvent length is suggested as being primarily under the influence of genetic drift in Atelopus. Clinal variability as noted by other authors in Acris is corroborated.

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