Studies on the Feeding Attractants for Fishes and Shellfishes. XX. Effects of Attractant and Repellent Mixtures on Behavior of the Oriental Weatherfish Misgurnus anguillicaudatus.

Abstract

The effects of mixtures of attractants (L-lysine and L-alanine) and repellents (L-glutamic acid, L-cysteic acid, n-butyric acid and DL-malic acid) were examined on the behavior of the oriental weatherfish Misgurnus anguillicaudatus The chemotactic activity of either 100MM of L-lysine or L-alanine was significantly affected by the addition of more than 10mM of each repellent. There was no difference in the activity of re-pellents. Similarly, the activity of 10MM of L-glutamic acid was affected by the addition of 1, 10 and 100mm of either L-lysine or L-alanine similar to each other. The same was true for repellents such as L-glutamic acid and DL-malic acid. It seems that the effects of repellents wer more significant than those of attractants in the same concentrations.