Here is the latest methods digest:- In Evolution Marta Szulkin, Nicolas Bierne and Patrice David have  perspective piece on measuring correlations between fitness and heterozygosity. Günter Wagner introduces a new approach to measuring fitness. Max Shpak and colleagues introduce an approach to coalescent modelling in populations that are structured and fluctuate seasonally. Richard Reynolds and colleagues look at the problem of measuring selection gradients. Valério Pillar … Continue reading Methods Digest – May 2010