Abstract
Color sensitivity of sea bream was studied by the method of behavioral observation of fish.
The red color substances in viscera of squid (Todarodes pacificus) and mysid shrimp induced the feeding behavior of sea bream. Absorption maxima of these colors were at 460nm in petroleum ether.
Of the synthetic pigments, yellow (naphthol yellow 1), orange (orange 1) and red (ponceau 3R) which have absorption maxima in the 430 to 500nm in water region and vitamin B2 caused only an attractive behavior of fish.
Optimun concentration of these pigments were 0.004mg/ml for yellow, 0.018mg/ml for orange, 0.010mg/ml for red, 0.071mg/ml for coffee color and 0.080mg/ml for vitaminB2.
