| body size and allometric shape variation in the molly poecilia vivipara along a gradient of salinity and predation. | phenotypic diversity among populations may result from divergent natural selection acting directly on traits or via correlated responses to changes in other traits. one of the most frequent patterns of correlated response is the proportional change in the dimensions of anatomical traits associated with changes in growth or absolute size, known as allometry. livebearing fishes subject to predation gradients have been shown to repeatedly evolve larger caudal peduncles and smaller cranial regions u ... | 2014 | 25471469 |