Electroretinographic analysis of ultraviolet sensitivity in juvenile and adult goldfish retinas

Electroretinographic (ERG) spectra show that juvenile goldfish have ultraviolet (UV) sensitivity but adults do not. Chromatic adaptation data suggest mediation by UV cones. ERG spectra from eye cups and spectrophotometry of lenses show that the loss of UV sensitivity with age does not result from lens changes. Our results contribute to a growing literature on UV cone mechanisms and visual development in fish.