Selective innervation of the goldfish suprachiasmatic nucleus by ventral retinal ganglion cell axons.

The contribution of central, peripheral, dorsal, ventral, nasal and temporal retinal ganglion cells to the innervation of the suprachiasmatic nucleus of goldfish was examined with cobaltous-lysine. The nucleus is innervated by axons from central, peripheral, temporal and nasal retina. However, this innervation originates only from ventral retinal ganglion cell axons. The retinal origin of the innervation may be related to being in an aquatic environment.