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Fig. 3. Mean cardiovascular variables at rest and while swimming at 1 and 2 BL s-1 in the sea bass, Dicentrarchus labrax. Solid lines represent untreated fish (N=8-9) and hatched lines (N=7) represent fish after treatment with prazosin (1 mg kg-1 Mb). The measured and calculated variables are (A) dorsal aortic pressure (PDA); (B) central venous pressure (PCV); (C) cardiac output (); (D) heart rate (fH); (E) stroke volume (Vs) and (F) systemic resistance (Rsys) All values are means ± S.E.M. *Statistically significant difference (P≤0.05) from the resting values within a treatment group, and {dagger}statistically significant difference (P≤0.05) between the values before and after prazosin treatment.





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