Movie 1.

An example of fiddler crabs optokinetic response to horizontally moving, vertically oriented sine-wave gratings at a spatial frequency of 0.1 cyc/deg, angular speed of 10 deg/s and contrast of 25%. The graphs show angular rotation of the left (yellow line) and right (blue line) eyes during the trial. The stimulus video was superimposed for illustration purposes.

Contrast sensitivity, visual acuity and the effect of behavioural state on optokinetic gain in fiddler crabs

Monika Perez, Zahra M. Bagheri, Courtney Brown, Yuri Ogawa, Julian C. Partridge, and Jan M. Hemmi

Journal of Experimental Biology 2023. 226:None-None; doi: 10.1242/jeb.245799