Figure 3
From: Evolutionary variation in the mechanics of fiddler crab claws
Species averages (± 1 S.E.M.) of morphological and mechanical variables across the phylogeny of fiddler crabs. Filled squares are the measured values, and open circles are corrected for body size: residuals of the OLS regression of the variable against body mass. Body mass, frontal area of the claw, an estimate of signal size, force required to puncture the cuticle, and force estimated at the claw tubercle are given (see text). Phylogeny is modified from Rosenberg, 2001. Branch lengths are arbitrary.