Darkness-induced reduction of the number of synaptic ribbons in fish retina.
D000818:Animals; D003623:Dark Adaptation; D005399:Fishes; D008854:Microscopy, Electron; D010786:Photoreceptor Cells / Q000166:cytology; D012160:Retina / Q000166:cytology*; D013569:Synapses / Q000166:cytology*