Martinez-Padilla, JPerez-Rodriguez, LMougeot, FLudwig, SRedpath, S M2014-08-282014-08-282014-05Martinez-Padilla, J, Perez-Rodriguez, L, Mougeot, F, Ludwig, S & Redpath, S M 2014, 'Intra-sexual competition alters the relationship between testosterone and ornament expression in a wild territorial bird', Hormones and Behavior, vol. 65, no. 5, pp. 435-444. https://doi.org/10.1016/j.yhbeh.2014.03.0120018-506Xhttp://hdl.handle.net/2164/3398Open Access funded by Natural Environment Research Council Under a Creative Commons license10654606engsexual selectionred grousemaleshormonescondition-dependencelagopus-lagopus-scoticusmale red grouseimmunocompetence handicap hypothesistrichostrongylus-tenuispopulation-dynamicsparasite infectionkin structurebehaviorcarotenoidsselectionQH Natural historyQL ZoologyQHQLIntra-sexual competition alters the relationship between testosterone and ornament expression in a wild territorial birdJournal article10.1016/j.yhbeh.2014.03.012655