title: Organ blood flow haemodynamics and metabolism of the albacore tuna Thunnus alalunga (Bonnaterre).
abstract: Metabolic haemodynamic, and organ blood flow measurements were made in tabled, partially anaesthetized albacore Thunnus alalunga. Heart rates were 115 +/- 9 beats/min: blood pressure 98/75 mm Hg (systolic/diastolic): cardiac output 36.1 +/- 5 (ml/min/kg): oxygen consumption 3.4 +/- 0.7 (ml O2/min/kg) and cardiac contractility (dP/dt) 6342 +/- 822 mm Hg/s. Organ blood flows were measured with radiolabelled microspheres. The red muscle, kidney, and spleen received the highest flows and the white-muscle the least. There was a flow gradient in the white-muscle with the inner portion near the red-muscle receiving the highest flows. Arterial and venous blood gas measurements showed a reverse temperature effect on arterial PO2 and a P50 of 15.9 Torr corrected to 37 degrees C. Red-muscle temperature was 7 degrees C higher than ambient water temperature. These measurements record the albacore's markedly high cardiovascular capability.
authors: University of California, San Diego, School of Medicine, La Jolla 92093.
authors: F C
authors: FC
authors: White
authors: R
authors: R
authors: Kelly
authors: S
authors: S
authors: Kemper
authors: P T
authors: PT
authors: Schumacker
authors: K R
authors: KR
authors: Gallagher
authors: R M
authors: RM
authors: Laurs
mesh_terms: D000818:Animals; D001784:Blood Gas Analysis / Q000662:veterinary; D001831:Body Temperature; D005399:Fishes / Q000502:physiology*; D006439:Hemodynamics; D008863:Microspheres; D010101:Oxygen Consumption; D012039:Regional Blood Flow; D014413:Tuna / Q000378:metabolism / Q000502:physiology*