Fig. 4
Structural equation model exploring the relationships between larval rearing temperature and nutrition level, wing length of emerged females, and their longevity. Positive relationships between variables are indicated with black arrows; negative relationships with red arrows. For clarity, only the significant paths are indicated (except for the effect of wing length on longevity, dotted arrow). The thickness of the paths is scaled according to the regression coefficient associated with each path. The numbers next to each arrow are standardised regression coefficients of the SEM (Table 2). Note that for the three-way interaction, the number shows the difference of the slope of longevity on wing length between, on the one hand, standard food and the highest temperature and, on the other hand, low food and the lowest temperature. The R2 associated with each component model is given with the relevant response variable