Neuropeptide signalling shapes feeding and reproductive behaviours in male .

Sexual dimorphism occurs where different sexes of the same species display differences in characteristics not limited to reproduction. For the nematode , in which the complete neuroanatomy has been solved for both hermaphrodites and males, sexually dimorphic features have been observed both in terms of the number of neurons and in synaptic connectivity. In addition, male behaviours, such as food-leaving to prioritise searching for mates, have been attributed to neuropeptides released from sex-shared or sex-specific neurons.