ORE Open Research Exeter TITLE Macronutrient balance mediates the growth of sexually selected weapons but not genitalia in male broad horned beetles AUTHORS House, Clarissa M; Jensen, K; Rapkin, J; et al. JOURNAL Functional Ecology DEPOSITED IN ORE 15 January 2016 This version available at http://hdl.handle.net/10871/25793 COPYRIGHT AND REUSE Open Research Exeter makes this work available in accordance with publisher policies. A NOTE ON VERSIONS The version presented here may differ from the published version. If citing, you are advised to consult the published version for pagination, volume/issue and date of publication 1 Macronutrient balance mediates the growth of sexually selected weapons 2 but not genitalia in male broad horned beetles 3 Clarissa M. House1*, Kim Jensen1,2, James Rapkin1, Sarah Lane1, Kensuke Okada3, David J. 4 Hosken1 and John Hunt1 5 1. Centre for Ecology and Conservation, College of Life & Environmental Sciences, 6 University of Exeter, Penryn Campus, Cornwall, TR10 9EZ, UK. 7 2. Department of Entomology, North Carolina State University, Gardner Hall, Raleigh, 8 NC 27695-7613, USA. 9 3. Laboratory of Evolutionary Ecology, Graduate School of Environmental Science, 10 Okayama University, Tsushima-naka 1-1-1, Okayama, Japan. 11 *correspondence: E-mail:
[email protected] 12 13 14 Running title: Macronutrients, weapons and genital traits 15 16 17 Summary 18 19 1. Condition is defined as the pool of resources available to an individual and can be 20 allocated to fitness-enhancing traits. Consequently, condition could influence 21 developmental trade-offs if any occur. Although many studies have manipulated diet to 22 demonstrate condition-dependent trait expression, few studies have determined the 23 contribution of specific nutrients that determine condition and mediate trade-offs.