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A Study of Fluctuating Asymmetry

Leigh Van Valen
Evolution
Vol. 16, No. 2 (Jun., 1962), pp. 125-142
DOI: 10.2307/2406192
Stable URL: http://www.jstor.org/stable/2406192
Page Count: 18
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A Study of Fluctuating Asymmetry
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Abstract

The correlations between the fluctuating asymmetries of different characters were investigated in three species (chaetae and wings of Drosophila melanogaster, cheek teeth of Peromyscus leucopus, and cheek teeth of the fossil horse Griphippus gratus). A mean correlation of 0 was found for the two former species, but a mean positive correlation of +0.046 was found for the horse. Reasons are given why this exception may be only apparent. The intensities of some morphological differences in Drosophila have a general component even though they may be bilaterally independent. The lack of variation for a general buffering capacity against minor developmental accidents was not expected. This and related matters are discussed.

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