The dependent variable in each panel is the residual growth rate (
R) from a regression of
R against regional trend in population sizes (
N
trend), which is explained by genotypic composition and habitat patch area in isolated patches (
S
t < 15). (A and B) show
R against the
Pgi genotype frequencies
F and
D, respectively, in small (
A < 0.3 ha; closed symbols, continuous line) and large habitat patches (open symbols, broken line). (C) shows
R against patch area in populations with
F greater (closed symbols, continuous line) or smaller than 0.3 (open symbols, broken line), respectively, and (D) shows the same result for
D. Statistics on
F are given in
Table 1. In (B and D), the interaction between
D and ln
A is significant (
p = 0.005; full model
F
3,40 = 3.64,
p < 0.02).