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FIGURE 12.6 Ontogeny of variance for skull
shape of the house mouse. The superimposed
landmarks for skull shape of the house mouse,
Mus musculus domesticus. Ages, in days after birth,
are shown beneath the data. Variance and its stan-
dard error for four ages are given in Table 12.1 .
TABLE 12.1 Skull Shape Variance of Mus musculus domesticus Sampled at Four Ages (Given in Days After
Birth), and the Standard Errors of the Variance
Age
Variance
Standard Error
10
0.000628
0.0001
15
0.000349
0.00005
20
0.000316
0.0001
25
0.000410
0.0001
The superimposed landmarks are shown in Figure 12.6 .
any selective deaths in the colony, indicates that variation is developmentally regulated
and the later stability of the variance also suggests canalization because we would expect
to see a continued production of variation in light of the ongoing process of skeletal
development.
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