Further, there are two incorrect citations in the second paragraph of the Introduction. The sentences with the correct citations should be: ‘In addition, in social insects, inbreeding can compensate for the reduction in relatedness and thereby restore fitness benefits to altruistic workers in colonies with multiple reproductives (Thurin & Aron 2009; Thurin et al. 2011). Indeed, not only a lack of inbreeding avoidance (Keane et al. 1996; Dewsbury 1988; Keller & Fournier 2002) but even preferential inbreeding has been described in social and nonsocial species (Thünken et al. 2007; Thurin & Aron 2009)’.
Hence, the reference ‘Haag-Liautard et al. 2009’ in the original article should in this paragraph be exchanged by the correct reference ‘Thurin & Aron 2009’. Thurin and Aron (2009) found evidence for active inbreeding in the ant Plagiolepis pygmaea. In this species, workers repel unrelated males that try to enter the colony and queens preferentially mate with close relatives. Inbreeding here maintains high levels of relatedness within colonies despite the co-occurrence of multiple queens that mate multiply.