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Fig. 5. Pregnancy periods (P) have higher growth rates compared with nonpregnancy
periods (NP). (A-C) The mean growth rates for pregnancy and nonpregnancy
periods, plotted on an arbitrary 10-week time scale. (A) Breeder 02-02 mean
growth rates for pregnancy (N=6) and nonpregnancy (N=2)
periods. (B) Breeder 02-04 mean growth rates for pregnancy (N=7) and
nonpregnancy (N=2) periods. (C) Breeder 02-05 mean growth rates for
pregnancy (N=5) and nonpregnancy (N=3) periods. (D) The mean
L4 growth over time for the three breeders during pregnancy (black dots;
N=18) and non-pregnancy (gray dots; N=7) time periods. The
data from the three animals were standardized to baseline before they were
averaged. The raw data used to generate the means varied in number between
data points because some X-rays were excluded due to poor image quality
(criteria for exclusion included images where the bones were not in focus or
at an angle, which often happened if the mole-rat had moved or shifted during
the X-ray exposure). Further, some of the nonpregnancy periods were less than
10 weeks in length, which also affected the number of data points. The
N values for each data point used to generate this panel are listed
in Table 3. Regression lines
were fitted to both sets of data. Error bars in panels A-D represent ±
s.e.m.
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