MATERIALS AND METHODS
To evaluate these hypotheses, we first analysed the phenotypic
trajectories of three D. pulex genotypes along a gradient of
predation risk, focusing on the magnitude, direction and shape of the
change in multivariate trait space. Second, we performed modularity and
integration tests to evaluate the head-body and dorsal-ventral
hypotheses mentioned above. In the following, we introduce the study
system, data and design before details on the above process.