Gow, ElizabethArcese, PeterDagenais, DanielleSardell, Rebecca J.Wilson, ScottReid, Jane M.2020-11-062020-11-062019-12-04Gow, E, Arcese, P, Dagenais, D, Sardell, R J, Wilson, S & Reid, J M 2019, 'Testing predictions of inclusive fitness theory in inbreeding relatives with biparental care', Proceedings of the Royal Society B: Biological Sciences, vol. 286, no. 1916, 20191933. https://doi.org/10.1098/rspb.2019.19330962-8452https://hdl.handle.net/2164/15324Data accessibility Data are deposited in Dryad https:doi.org/10.5061/dryad.1zcrdfnf. R code supporting this article has been uploaded as part of the electronic supplementary material. Acknowledgements We thank the Tsawout and Tseycum First Nation bands for allowing access to Mandarte, numerous field assistants, graduate students and postdoctoral fellows who contributed to long-term data collection, and Brad Duthie for insightful discussions regarding underlying concepts. National Sciences and Engineering Research Council (P.A., E.A.G); Izaak Walton Killam Memorial Fund for Advanced Studies (E.A.G, J.M.R.), UK Natural Environment Research Council (R.J.S.) and the European Research Council (J.M.R.) provided funding.4669142engextra-pair paternityinbreedinginclusive fitnesskinshipparental careparent-offspring relatednessQH301 BiologyNatural Environment Research Council (NERC)European Research CouncilSupplementary DataQH301Journal article10.1098/rspb.2019.1933https://doi.org/10.6084/m9.figshare.c.4738811.v12861916