Henshaw, JonathanKokko, HannaJennions, Michael2015-12-130014-3820http://hdl.handle.net/1885/72385Simultaneous hermaphroditism is predicted to be unstable at high mating rates given an associated increase in sperm competition. The existence of reciprocal egg trading, which requires both hermaphroditism and high mating rates to evolve, is consequently201510.1111/evo.127172015-12-11