Parentage analysis
After COLONY’s parentage reassignment, genotype reconstruction, and
filtering with the different thresholds, 105 nests were assigned to 27
genotyped mothers, and 13 were assigned to 4 reconstructed females
between seasons 2014/15 and 2020/21. The total of 118 nests accounted
for 448 offspring. One hatchling that was not assigned to any nest was
linked with a genotyped mother. Out of these 118 nests, 70 counted more
than one genotyped hatchling. Once the father’s genotypes were
reconstructed, a total of 27 fathers explained the genotypes of the 448
hatchlings. The operational sex ratio (OSR) ranged from 0.8 to 1.3 males
per female depending on the season, averaging at 0.87, but the sample
size was small with fewer than 10 males and females per season. (Table
2). Thus, temporal variations between the nesting seasons were not
investigated.