Premiers - Outil de Suivi des Contrats

Annexe III
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found a significant effect of the different periods of incubation time on egg growth. No
significant effect of sex phenotype or others interactions was found.
The second model tested confirmed the latter results with significant effects of clutch identity,
initial egg mass and the memory of the previous substrate moisture (Table 2.1, model 2). With
the other factors describing hydric history in each period of incubation, we revealed a
significant effect of hydric history in the two last periods of incubation and significant
interactions between hydric history in each period of incubation and the memory of the
previous water potential of substrate.
Hatching success
From 188 eggs incubated, 176 living hatchlings emerged. Eight eggs aborted at an early stage
of embryogenesis by fungal infections and four eggs had aborted after a rupture of the
eggshell during the last period of incubation. The reduced number of dead embryos did not
permit us to perform statistical analyses of hatching success.
Incubation length
According to the best minimal model, there was a significant effect of clutch identity on
incubation length, whatever the water potential treatment (Table 2.2). We also found a
positive correlation between duration of incubation and initial egg mass (Figure 2.a), in
addition to a negative correlation with the time spent on dry substrate during incubation
(Figure 2.b). No effect of sexual phenotype and the two-way interactions was significant.
Mass of hatchlings
According to the best minimal model, there was a strong and significant effect of clutch
identity on hatchling mass. We also found a highly and significant positive correlation
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