Figure legends
Fig. 1 Population densities across live-trapping sessions in 2012 (A)
and 2015 (C) and the numbers of founder individuals in 2012 (B) and 2015
(D). The population density was estimated as the minimum number known to
be alive (MNKA) in each enclosure. Data from the four enclosures in each
of the two density groups were expressed as mean ± standard error (SE).
Fig. 2 Mean (± SE) recruitment in 2012 (A) and 2015 (B), mean the
proportion of reproductive females in 2012 (C) and 2015 (D), and of
reproductive males in 2012 (E) and 2015 (F), in the experimental
periods. Data from the four enclosures in each of the two density groups
were expressed as mean ± standard error (SE).
Fig. 3 The regression analysis of number of female founders with
recruitment (A), the proportion of reproductive females (B) in 2012 and
2015, and the proportion of reproductive males (C) in 2015. Mean number
of founders per enclosure was used as the independent variable and the
corresponding recruitment and the proportion of reproductive condition
per enclosure were the dependent variables. The female-founder number
was negatively correlated with mean recruitment
(F 1, 6 = 16.51, P = 0.007 for 2012;F 1, 6 = 15.93, P = 0.007 for 2015) and the
proportion of reproductive females (F 1, 6 =
90.42, P < 0.0001 for 2012; F 1,
6 = 6.34, P = 0.045 for 2015). The male-founder number was
negatively correlated with the proportion of reproductive males in 2015
(F 1, 6 = 24.28, P = 0.003), but not in
2012 (F 1, 6 = 2.93, P = 0.138).
Fig. 4 Recursive models in structural equation model, testing the direct
and indirect effects of founder number on and FCM level, recruitment and
the proportion of reproductive condition. The structural equation model
considered all plausible pathways in which trapping sessions and number
and FCM levels influence reproduction. Arrows represent the flow of
causality. Solid arrows represent a significant positive pathway;
double-headed solid arrows, a significant negative pathway; dotted
arrows, a non-significant pathway. Path coefficients associated with
each arrow show standardised effect sizes. Numbers indicate the standard
path coefficients. CT, cumulative time of trapping session; N, number of
founders; P, proportion of reproductive condition; R, recruitment. *P < 0.05, **P < 0.001, ***P< 0.0001. For the proportion of reproductive females,χ 2 = 4.00, P = 0.26, RMSEA = 0.07 in
2012 and χ 2 = 2.00, P = 0.91, RMSEA
=0.00 in 2015. For the proportion of males, χ 2= 0.92, P = 0.34, RMSEA = 0.00 in 2012 andχ 2 = 3.34, P = 0.19, RMSEA = 0.07 in
2015. For recruitment, χ 2 = 3.27, P =
0.35, RMSEA =0.04 in 2012 and χ 2 = 2.17,P = 0.34, RMSEA =0.04 in 2015. RMSEA, root mean square error of
approximation.