DORSAL AORTIC BLOOD PRESSURES RECORDED FROM THE RAINBOW TROUT (SALMO GAIRDNERI)

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Abstract
Dorsal aortic blood pressures were recorded from unanesthetized, free-swimming intact fish by a previously described cannulation technique. Some cardiovascular and breathing changes during recovery from the operation and anesthesia are reported. Dorsal aortic systolic blood pressures of 38.7 ± 2.9 mm Hg were recorded from unrestrained intact trout (Salmo gairdneri). A limited study indicated that there were no variations in dorsal aortic systolic blood pressure with changes in oxygen consumption in quiescent fish.