... electroretinograms (A) and optic nerve compound action potentials (CAPs; B, ON responses and C, OFF responses, respectively) in adult Nile tilapia. Error bars show standard error of the mean ( N =4 except, A: 380, 620, 640 and 680 nm, N =3; B, 380 and 680 nm, N =3; C, 500 and 680 nm, N =3). The multi-coloured...

... be detected in rainbow trout( Oncorhynchus mykiss ) both in the electroretinogram (ERG) and in the compound action potential (CAP) measured in the optic nerve, indicating a strong retinal contribution to the processing of polarized light. The CAP recordings showed a W-shaped sensitivity curve, with a peak...

... to stimuli in these two ranges. Nerve responses consist of trains of compound action potentials (CAPs), each produced by the summed activity of a number of receptor neurons. The amplitude of the CAP is up to four times larger for stimuli at 4.5 kHz than for stimuli at 30 kHz, suggesting either...