Fig. 8. Results of cross-adaptation experiments to (A) putrescine (Put; 9–50 µmol l^–1), (B) cadaverine (Cad; 20–40 µmol l^–1) or (C) spermine (Spe; 2–7 µmol l^–1). The adapting solution in A–C is underlined. Bars indicate percentage of unadapted response (mean ± S.D.). Numbers associated with each bar indicate the number of fish tested for each odorant. L-arginine (Arg; 0.1–1 mmol l^–1); _L-lysine, (Lys; 0.1–1 mmol l^–1); _L-methionine (Met; 0.1–0.5 mmol l^–1); _L-ornithine (Orn; 0.1–1 mmol l^–1); amylamine (Amy; 0.03–0.5 mmol l^–1); butylamine (But; 0.05–0.5 mmol l^–1). Response magnitudes to test stimuli (A–C) are significantly greater than the response magnitude to the adapting solution (one-way ANOVA; Tukey's post hoc test, P<0.05).