Phototactic and Pigmentary Responses of Sockeye Salmon Smolts following Injury to the Pineal Organ

Abstract

Light sensitivity of the sockeye salmon smolt (Oncorhynchus nerka) is dependent upon the pineal organ as well as the eyes. Destruction of the pineal area of the brain affects the distribution of pigment in the chromatophores and the phototactic response of the fish.