Schematic view of the experimental set-up used to determine female preferences under predation risk. A. During the 1st part of the tests the focal female could choose to associate with either of two stimulus males (large and small). B. Tests were repeated while a predator (here: C. salvini) was presented in an adjacent tank (2nd part). Fishes are not drawn to scale.
Bierbach et al. BMC Evolutionary Biology 2011 11:190 doi:10.1186/1471-2148-11-190