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Figure 7


Fig. 7. (A,C,D) The respiratory responses of zebrafish Danio rerio pre-exposed to hyperoxia (PwO2>350 mmHg) for 28 days (unfilled circles) to (A) acute hypoxia (N=12), (C) hypercapnia (N=8) or (D) sodium cyanide (N=7) compared to the responses of control fish (filled circles; N=12 different fish for each treatment). (B) Average rates of change of breathing frequency (fR) between 40 (Control) and 155 mmHg (Hyperoxia) for the two groups. *Significant differences within the control or experimental groups; {dagger}significant differences between the control and experimental groups; two-way RM ANOVA (P<0.05).