ドジョウに対する摂餌誘引物質の推定

抄録

The attraction index a, which is one of the coefficients of a logistic curve y=g/{1+exp[-r(j-a)]} in the remaining time-course of test compartment, was examined for 42 specimens comprising of aquatic and terrestrial organisms used as test materials. Two species of worms of the oligochaets, one species of freshwater mussel of the bivalves, two species of sawtooth caridina and lake prawn of the crustaceans, and one species of the cow in terrestrial animals were effective in attracting oriental weatherfish. The oligochaets were most effective.
The behavioral observations lead to the following suggestion: The attraction by the three representative organisms, the worm, the freshwater mussel and the sawtooth caridina depended closely on the three chemical constituents, non-proteins N, amino acids and volatile bases N. This validity was furthermore confirmed by teh significance test of correlation coefficient between the attraction index a and the contents of these three constituents. In this context, three constituents of which at least two, amino acids and volatile bases N, mainly contained in the fraction of nonproteins N, appear to be the most probable components in feeding attractants for oriental weather fish.