Biology Reference
In-Depth Information
TABLE 12.2 Two-Way Mixed Model Procrustes ANOVA of Fluctuating Asymmetry of the Prairie Deer
Mouse Mandible
Source
SS
DF
MS
F
p
Individuals
0.21283
17088
1.2455e-005
9.62
,
0.001
Sides
0.00082
192
4.2432e-006
3.28
,
0.001
Individuals
3
Sides
0.02211
17088
1.2941e-006
5.12
,
0.001
Measurement error
0.00874
34560
2.5298e-007
FIGURE 12.8 First principal component of variation of fluctuat-
ing asymmetry of the prairie deer mouse ( Peromyscus maniculatus
bairdii ). (A) Mandible; (B) cranium.
Measuring the Overall Magnitude of FA
To compare levels of FA across populations we need a measure of the overall magni-
tude of FA. In the literature of traditional morphometric data, there is a large, even bewil-
dering, array of such metrics. Palmer and Strobeck (2003) list 18 of them, some with two
variants. Fortunately, only one of those is suitable for landmark data, and only two more
have been added to the list. Of these, two are in units of Procrustes distance and the other
Search WWH ::




Custom Search