|U. Sinsch, B. Pelster and G. Ludwig. Journal of Zoology. APR 2015. The potential causes underlying geographical variation of 12 age- and size-related life-history traits were studied in the common frog Rana temporaria. The meta-analysis was based on own field data obtained in the Austrian Alps and additionally on published studies on 35 populations covering the whole range of latitudinal, longitudinal and altitudinal distribution. Leer más.