Resolution:
## Figure 4.
Path diagram of the relationships between morphology, swimming speed, and fitness. The results of model 5 (Table 5) are illustrated here. Double-headed arrows represent
covariances (range: 0.551 - 0.854), and all of them are significant. Values near single-headed
arrows are maximum likelihood parameter estimates of partial regression coefficients
(direct effects. Arrows lacking a number represent causal paths set to zero (Table
5). Arrow thickness is proportional to the strength of relationship. Black arrows
present significant parameter estimates, and grey arrows represent relationships that
are not significant. The P-value of the dark grey arrow (head length → fitness) is 0.06. Note that the causal
paths between head length → fitness and head length → maximum swim speed are significant
in model 9, which had the best AIC score (Table 6).
Calsbeek and Kuchta |