Biology Reference
In-Depth Information
(
Figure 11.7
) are shown in
Table 11.4
. The several measurements that are strikingly
negatively allometric in both species (v4
v7) are all measurements of width, especially the
widths of the cranial base. The most striking positive allometries are, for the house mouse,
v9
v11, which are all measurements of facial length except that v10, which extends from
FIGURE 11.7
Landmarks sampled on ventral skull of the
cotton rat, Sigmodon fulviventer, and house mouse, Mus muscu-
lus domesticus, and the traditional morphometric measurement
scheme based on those landmarks.
TABLE 11.4
Ontogenetic Allometric Coefficients (k) for Postnatal
Growth of the House Mouse (Mus musculus domesticus) and Cotton Rat
(Sigmodon fulviventer) for the Craniofacial Measurements Shown in
Figure 11.7
Variable
House Mouse
Cotton Rat
v2
1.10
1.39
v3
0.95
0.75
v4
0.61
0.57
v5
0.45
0.63
v6
0.37
0.65
v7
0.57
0.62
v8
0.96
0.93
v9
1.34
1.10
v10
1.45
1.68
v11
1.27
1.02
v12
1.13
0.94
v13
1.07
1.09
