Fig. 7. Results of cross-adaptation experiments utilizing mixtures of odorants. Adaptation to (A) L-amino acids (alanine, arginine, glutamate and methionine; 10–500 µmol l^–1), (B) bile salts (sodium taurocholate and taurolithocholate; 0.3–10 µmol l^–1), (C) ATP (30–70 µmol l^–1) and (D) polyamines (1–40 µmol l^–1 putrescine, cadaverine and spermine). The adapting solution in A–D is underlined. Bars indicate the percentage of unadapted response (mean ± S.D.). Numbers associated with each bar indicate the number of fish tested for each odorant category. Responses to test stimuli (A–D) are all significantly greater than the response to the adapting solution (one-way ANOVA, Tukey's post hoc test, P<0.05).