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Figure 4


Fig. 4. (A) ASR frequency and (B) time spent in ASR (time spent at the surface) of tambaqui, Colossoma macropomum, exposed to normoxia (PwO2=140 mmHg at time zero) and then severe hypoxia (PwO2=10 mmHg) for 360 min. Circles, intact fish (N=8); squares, fish with cranial nerves IX+X denervated (N=8); triangles, fish with cranial nerve V denervated (N=8). Values are means ± s.e.m. Open symbols indicate values that are significantly (P<0.05) different from time zero. +Intact and denervated fish are significantly different.





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