Fig. 6. Results of cross-adaptation experiments. (A) Adaptation to 10^–5 mol l^–1 TCDC; (B) adaptation to a mixture of 10^–6 mol l^–1 amino acids (Ala, Arg and Pro). Bars indicate the percentage of the unadapted response (means ± s.d.). Responses significantly greater than control responses: (A) Pro, Ala and Arg; (B) TCDC, GCDC and CDC (one-way ANOVA; Tukey's post hoc test, P<0.05). N=3 fish tested.