It has been suggested for some taxa from the northern hemisphere, that body size and geographic range width, decrease from the poles to the Ecuador, where species richness increases. In this paper, the existence of latitudinal ...

Bergmann's rule is one of the most known biological rules and relates the body size variation to changes in latitude or temperature. Most recently, a "resource rule" had been presented, which explains several trends in ...

1. The variation in cranial size of the crab-eating fox Cerdocyon thous was analysed in relation to latitude and several environmental variables throughout its distribution in South America. 2. We tested the existence of ...

The density, size, and morphology of coastal invertebrate species often predictably vary with latitude. In this study we evaluate whether the density, size, and morphology of the pulmonate limpet, Siphonaria lessonii, in ...

We tested the validity of Bergmann’s rule and Rosenzweig’s hypothesis through an analysis of the geographical variation of the skull size of Otaria flavescens along the entire distribution range of the species (except ...