Table 1.

Results of genetic analyses of sand tiger litters (Ct001–Ct015). N embryos is the litter size. PAC, paternal allele counts. The relationship between the hatchlings as assessed in ML-Relate is provided under the following headings: PutFS, the simulation-based probability that the alternative relationship (half-siblings) better fits the hatchling genotypes than the putative relationship of full-siblings. If this value is low then the putative relationship is most likely to be true; PutHS, the simulation-based probability that the alternative relationship (full-siblings) better fits the hatching genotypes than the putative relationship of half-siblings. n.a., test not applicable; ?, mating behaviour uncertain. ‘Behavioural polyandry’ was established by either PAC and/or when hatchlings were most likely to be half-siblings. ‘Genetic polyandry’ is established when hatchling were most likely to be half-siblings.

litterhatchlings
femalen embryosPACPutFSPutHSbehavioural polyandrygenetic polyandry
Ct0012n.a.0.840.02yesyes
Ct0022n.a.0.0020.65?no
Ct0032n.a.0.450.034yesyes
Ct0042n.a.0.010.45?no
Ct0052n.a.0.010.45?no
Ct0062n.a.0.1320.999?no
Ct0072n.a.0.6850.009yesyes
Ct0082n.a.0.790.005yesyes
Ct0092n.a.0.0320.34?no
Ct0102n.a.0.0030.85?no
Ct01172–4/locus0.320.06yesyes
Ct01282–4/locus0.340.05yesyes
Ct01362–4/locus0.0070.52yesno
Ct01492–4/locus0.0050.56yesno
Ct01572–4/locus0.0010.59yesno