Expected heterozygosity (He) under Hardy-Weinberg genotypic proportions for ex situ samples collected in 1995, recollected in 2004, and in situ populations sampled in 2009.

Differences in first letter correspond to significant differences in He among the four locations within the same year. Differences in second letter correspond to significant differences in He within location across the three years sampled (Bonferroni correction for testing seven hypotheses based on overall critical p-value of 5% is ≤0.007).