UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Effects of brood manipulation costs on optimal sex allocation in social hymenoptera

Reuter, M; Helms, KR; Lehmann, L; Keller, L; (2004) Effects of brood manipulation costs on optimal sex allocation in social hymenoptera. AM NAT , 164 (3) E73 - E82. Green open access

[thumbnail of 10654.pdf]
Preview
PDF
10654.pdf

Download (151kB)

Abstract

In eusocial Hymenoptera, queens and workers are in conflict over optimal sex allocation. Sex ratio theory, while generating predictions on the extent of this conflict under a wide range of conditions, has largely neglected the fact that worker control of investment almost certainly requires the manipulation of brood sex ratio. This manipulation is likely to incur costs, for example, if workers eliminate male larvae or rear more females as sexuals rather than workers. In this article, we present a model of sex ratio evolution under worker control that incorporates costs of brood manipulation. We assume cost to be a continuous, increasing function of the magnitude of sex ratio manipulation. We demonstrate that costs counterselect sex ratio biasing, which leads to less female-biased population sex ratios than expected on the basis of relatedness asymmetry. Furthermore, differently shaped cost functions lead to different equilibria of manipulation at the colony level. While linear and accelerating cost functions generate monomorphic equilibria, decelerating costs lead to a process of evolutionary branching and hence split sex ratios.

Type: Article
Title: Effects of brood manipulation costs on optimal sex allocation in social hymenoptera
Open access status: An open access version is available from UCL Discovery
Keywords: kin selection, conflict, model, evolutionary branching, REPRODUCTIVE ALLOCATION, EVOLUTIONARY STABILITY, RELATEDNESS ASYMMETRY, KIN SELECTION, ANT WORKERS, RATIOS, COLONIES, CONFLICT, QUEENS, INSECT
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment
URI: https://discovery.ucl.ac.uk/id/eprint/10654
Downloads since deposit
272Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item