Reproductive skew and the threat of eviction: a new perspective

Abstract

Restricted accessMoreSectionsView PDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmail Cite this article Johnstone Rufus A. and Cant Michael A. 1999Reproductive skew and the threat of eviction: a new perspectiveProc. R. Soc. Lond. B.266275–279http://doi.org/10.1098/rspb.1999.0633SectionRestricted accessReproductive skew and the threat of eviction: a new perspective Rufus A. Johnstone Rufus A. Johnstone Department of Zoology, University of Cambridge, Downing Street, Cambridge CB1 3EJ, UK () Google Scholar Find this author on PubMed Search for more papers by this author and Michael A. Cant Michael A. Cant Department of Biology, University College London, Wolfson House, 4 Stephenson Way, London NW1 2HE, UK () Google Scholar Find this author on PubMed Search for more papers by this author Rufus A. Johnstone Rufus A. Johnstone Department of Zoology, University of Cambridge, Downing Street, Cambridge CB1 3EJ, UK () Google Scholar Find this author on PubMed Search for more papers by this author and Michael A. Cant Michael A. Cant Department of Biology, University College London, Wolfson House, 4 Stephenson Way, London NW1 2HE, UK () Google Scholar Find this author on PubMed Search for more papers by this author Published:07 February 1999https://doi.org/10.1098/rspb.1999.0633AbstractMost recent models of the partitioning of reproduction attempt to explain patterns of skew on the assumption that dominant individuals have complete control over breeding opportunities within the group, but may nevertheless concede a share of direct reproduction to subordinates as an incentive to remain peacefully in the association. Although these models may be applicable to some animal societies, we argue that they fail to provide a comprehensive theory of skew. Instead, we suggest that subordinates may often be able to claim unsanctioned reproduction for themselves, but will be forced to exercise a degree of reproductive restraint lest they incite ejection by the dominant. Reproductive skew, in other words, may reflect the threat of ejection (inducing subordinate restraint) rather than the threat of subordinate departure (inducing reproductive concessions by dominants). We present a simple ESS model of reproductive skew under these circumstances, which demonstrates that a shift in emphasis from reproductive concessions by dominants to reproductive restraint on the part of subordinates, radically alters the predictions of skew models. High group productivity, high relatedness and (when group members are related) strong ecological constraints are all expected to lead to reduced skew (the opposite conclusions to those of previous, concession-based analyses). The reason is that these factors reduce the benefits (or increase the costs) of ejection to the dominant, who therefore does best to tolerate more subordinate reproduction. Previous ArticleNext Article VIEW FULL TEXT DOWNLOAD PDF FiguresRelatedReferencesDetailsCited byLeimar O and Bshary R (2022) Effects of local versus global competition on reproductive skew and sex differences in social dominance behaviour, Proceedings of the Royal Society B: Biological Sciences, 289:1987, Online publication date: 30-Nov-2022. Buston P and Clutton-Brock T (2022) Strategic growth in social vertebrates, Trends in Ecology & Evolution, 10.1016/j.tree.2022.03.010, Online publication date: 1-Apr-2022. Iwasa Y and Yamaguchi S (2022) On the role of eviction in group living sex changers, Behavioral Ecology and Sociobiology, 10.1007/s00265-022-03159-9, 76:4, Online publication date: 1-Apr-2022. 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Series B: Biological Sciences, 266:1419, (571-578), Online publication date: 22-Mar-1999. This Issue07 February 1999Volume 266Issue 1416 Article InformationDOI:https://doi.org/10.1098/rspb.1999.0633Published by:Royal SocietyPrint ISSN:0962-8452Online ISSN:1471-2954History: Published online07/02/1999Published in print07/02/1999 License: Citations and impact Keywordsreproductive suppressiongame theoryaggressioncooperative breedingsociality Large datasets are available through Proceedings B's partnership with Dryad