Table 1. Relative distribution of microsphere estimated blood flow to the viscera.

	Percentage of total blood flow
Organ	Rest	0.5 Umax	0.75 Umax	0.9 Umax
Liver	2.96±1.61	1.24±0.38	0.60±0.33	0.16±0.04
Stomach	2.28±1.11	2.68±1.44	1.31±0.95	0.71±0.27
Intestine & pyloric caecae	9.77±3.80	6.25±1.83	5.31±2.45	2.93±1.12
Spleen	0.31±0.25	0.39±0.34	0.04±0.02	0.03±0.01
Swim Bladder	0.20±0.06	0.24±0.06	0.14±0.06	0.12±0.05
Kidneys	7.79±3.17	3.41±0.85	3.22±1.07	2.92±0.65
Gonads	1.12±0.41	1.43±0.98	0.65±0.37	0.24±0.12
Gills	0.76±0.19	0.73±0.21	0.44±0.13	0.38±0.12
Heart	0.14±0.06	0.13±0.07	0.08±0.04	0.07±0.03

Data are presented as mean ± sem (N = 6 to 8). Microspheres found in the gills and heart reached them via the venous return and do not reflect the total blood flow through these organs. The low amounts found in these tissues confirm adequate capture of the injected microspheres in the systemic capillary beds.