Dorsal Aortic Blood Pressures Recorded From the Rainbow Trout (Salmo Gairdneri)

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.