Table 2. Procrustes ANOVA on the mandible.

	Sum of Squares	df	Mean Square	Variance Components	% Variance
Individuals (I)	0.775	9548	8.1 × 10−5***	19.66	6.49
Strain	0.476	504	0.0009***	234.75	77.52
Side (S)	0.194	28	0.0069***	20.34	6.71
I × S	0.422	10,052	4.2 × 10−5***	15.38	5.07
Error	0.256	19,992	1.26 × 10−5	12.66	4.18

Procrustes analysis of variance of the amount of shape variation attributable to different sources. Sum of squares, mean square, and variance components are in units of squared Procrustes distances (variance components × 10⁶). The percentage contribution (% variance) of each variance component to the total variance also is given. I stands for individuals, and side (S) indicates directional asymmetry. The interaction I × S stands for fluctuating asymmetry, and the residual variance indicates the measurement error. ^***P < 0.001.