Summary analysis of the 13 microsatellite loci used in this study.

Average heterozygosity and standard deviation (SD) and number of alleles with SD are shown for the pre- and post-El Ni?o time samplings of specific populations. Values of FST and locus specific heterozygosity values were calculated between time point samplings. In the last column, only the p values of the corresponding Wilcoxon signed-ranks test are provided for the locus specific differences in heterozygosity between time samplings of a specific population. The actual locus specific heterozygosity values can be found in Table S2. Significant differentiation (pST values and locus specific heterozygosity values are marked with an asterisk (*).