Figure 3.

Relationship networks of well-sampled social units, based on genetic data. Females are indicated by circles and males by squares. Dark grey indicates adults and light grey indicates offspring. Solid lines denote mother–offspring relationships, as determined using Colony or ML-Relate. Dotted lines indicate pairs that were most likely second-degree relatives, but for which ‘unrelated’ was also a likely option (as determined using ML-Relate). Genetic data were unavailable for six offspring; these individuals are not shown. (Note: variation in edge length is an artefact of the figure arrangement and does not convey information.)