Brazill-Boast, JamesGriffith, Simon C.Pryke, Sarah2015-12-130269-7653http://hdl.handle.net/1885/77857Understanding genetic colour polymorphism has proved a major challenge, both in terms of the underlying genetic mechanisms and the evolutionarily forces maintaining such genetic variation. In this context, genetic differences in aggression or competitive-Morph-dependent resource acquisition and fitness in a polymorphic bird201310.1007/s10682-013-9651-12015-12-11