Abstract
We have studied about the influence of colors on the behavior of young marine fish to know the relation between the light and fish which is essential to the knowledge of the fish gathering lamp.
1. As the results of our experiments, it was found that there are two fish groups, A and B, their reactions to light being quite different; among the eight lights (including white), green and blue bring forth the greatest fish gathering rates, for Oplegnathus, Monaeanthus, Cybium, Spheroides and Sphyraena (of the former group).
2. It becomes evident that the light. chasing tendency of A-group fish are due not to the energy of light but rather to the wave length of light.
3. A-group fish can be classified into two different sub-groups, one scarcely has any light-chasing tendency for white light, (as in Cybium and Sphyraena), and the others has fairly strong chasing tendencies (as in Spheroides).
4. Considering the fish-gathering rates for white light as a standard, Anguilla, which belongs to B-group, shows almost no reaction to blue, green, indigo and yellow, but shows distinct light-chasing tendency for violet and red.
