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Fig. 6. Food intake (g bird-1 day-1) on days following the termination of the chaff/seed food regimes (i.e. all birds had seeds without chaff), in relation to the chaff/seed ratio experienced in the previous 6 weeks. Data points indicate the average over the 3 days per bird. Repeated measures GLM: chaff/seed ratio, F2,21=4.15, P=0.030; day, F2,21=2.74, P=0.087. Regression equation: y=3.65+0.09x.