Figure 1.

Changes in mating preferences of Atlantic molly females that had observed male hetero- and homosexual interactions. Female preferences for either of two video-animated stimulus males were re-evaluated after focal females could observe one of the following three situations: the initially non-preferred (drabber) stimulus male was (i) swimming alongside a model male (control; n = 31 trials), (ii) performing pre-copulatory nipping behaviour with a model female (heterosexual behaviour; n = 30), or (iii) performing pre-copulatory nipping behaviour with a model male (homosexual behaviour; n = 31). Positive copying scores indicate that focal females increased their preferences for previously non-preferred males. ***p < 0.001. Data are mean ± s.e.m.