Fig. 5: Analyses of biological parameters.

A Genetically estimated breeding population size of the Cayman Islands wild populations during the sampled period showing a sex ratio not significantly different from 1:1. Females include both wild individuals and females inferred by parentage analysis, while males were all inferred by parentage analysis. B Boxplots of observed heterozygosity values for the CTF breeding stock subgroups, wild females and nests related (RH) or unrelated (UH) to the CTF (n = 634 individuals). Boxplots sharing a lowercase letter showed non-significant differences according to two-sided Wilcoxon rank-sum tests, while boxplots not sharing any lowercase letter presented significant differences. The details of each pairwise Wilcoxon rank-sum can be found in the Supplementary Information, Table S5. The lower and upper hinges of each boxplot correspond to the first and third quartiles (the 25th and 75th percentiles). The upper whisker extends from the hinge to the largest value no further than 1.5 * IQR from the hinge (where IQR is the inter-quartile range). The lower whisker extends from the hinge to the smallest value at most 1.5 * IQR of the hinge. Data beyond the end of the whiskers are called ‘outlying’ points and are plotted individually. The line represents the median of all values.