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Figure Caption
Fig. 4 Representative trace. Twitch force of an isolated ventricle from a normoxia adult zebrafish at before the onset of a hypoxic exposure and once 10 kPa of O2 was reached after 5 min. In this case, twitch force decreased after O2 was initially reduced and continue to fall until 10 kPa of O2 was reached.
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Full text @ Am. J. Physiol. Regul. Integr. Comp. Physiol.