Figure 5 : Reaction norms for each family separated by source
island; the first and second columns of graphs are for individuals from
the open and shaded islands, respectively (i.e., reaction norms reflect
the trait values for all offspring from a single mother. The third
column represents the reaction norms averaged for each family group (red
curve = open island, blue curve = shaded island, black curve = average
of all family groups). (a) Reaction norms for body mass; (b) Reaction
norms for snout-vent length; (c) Reaction norms for spring speed; (d)
Reaction norms for water loss. All reaction norm slopes reported are
measured directionally from the open to the shaded incubation treatment.
That is, a positive slope conveys a larger trait value in the shaded
treatment and a negative slope conveys a larger trait value in the open
treatment. The y -axis has been changed for the plots showing the
average reaction norms to better see the patterns.
Table 1. Effect of incubation treatment, island, and covariates
on hatchling phenotypes. Statistically significant interaction terms
were retained in the final models. Descriptive statistics (means and
standard deviations) for each island and incubation treatment are
reported in supplemental Table 2). Estimates for treatment and source
island effects were calculated with the shaded incubation treatment and
shaded island as references. In the random effects columns
σ2 = the residual variance, τ00 = the
random intercept variance (maternal ID was the random effect in models
for mass and SVL), ICC = interclass correlation.