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Fig. 4. Length of skull (A), tarsus (B) and wing (C) as a function of age, as well
as growth rates of the skull (D), tarsus (E) and wings (F) as a function of
the body mass growth rate in control fed (filled symbols, N=5) and
diet-restricted nestlings (open symbols, N=7) kept in the laboratory.
The regression line of a logistic growth curve calculated from 1050 biometric
measurements of nestlings fed by their parents in the colony is shown for
comparison in A–C. In D–F, the growth rate of a sample of eight
nestlings fed by their parents in the colony, of which we had biometric
measurements at the age of 12 and 16 days, is shown for comparison (open
diamonds). The growth rates were calculated for the period from the age of
12–16 days. Values are means ± 1 S.E.M.
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