Does the rock hyrax, Procavia capensis, conform with Bergmann's rule?

Size variation of the skull of the rock hyrax, Procavia capensis, in southern Africa was related to several temperature parameters. All the four skull parameters examined were significantly correlated with temperature. The highest correlation was with the mean maximal temperature and the lowest with temperatures of the coldest month (July). These results are interpreted that the rock hyrax adapted morphologically to high temperatures, but avoids exposure to low temperatures by behavioural mechanisms such as hiding in caves.