The Relative Effectiveness of Spectral Radiation for the Vision of the Sun-Fish, Lepomis

Open Access
Publisher Website
Google Scholar
Abstract
The maximum absorption for the visual-purple of the sunfish is at 540 m[mu]. These fish respond in a characteristic manner to moving visual stimuli of sufficient intensity. The wave-length of maximum efficiency for this response lies between 535-545 m[mu]. The shape of the visibility curve, however, differs from that of the visual-purple absorption curve, and one fish had different visibility curves at different times. This is explained by the assumption of the presence of varying amounts of oil globules. Comparison of visibility curves for bright and dim illuminations shows that for the former there is a shift in the maximum to about 600 m[mu], therefore the Duplicity Theory of V. Kries holds for this fish.

This publication has 0 references indexed in Scilit: