Individual profiles of the position of each focal worm in the mate choice experiment. S. pungitii was the focal worm in trials a-g (purple), S. solidus in trials h-n (blue) and the controls are trials m-s (green). Positive scores for the position indicate the location of the conspecific, negative scores indicate the position of the worm from a different species or empty compartments (for controls only). (DOCX 526Â kb