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Figure 1


Fig. 1. Total free amino acid (AA) levels in blood plasma (nmol ml-1; means ± s.e.m.) collected synchronically from the hepatic portal vein (HPV; black squares) and dorsal aorta (DA; white squares) in free-swimming rainbow trout after a single meal. *Statistically significant difference (P<0.05, **P<0.01, ***P<0.0001) between the DA and HPV values at a given sample time. Values from the same vessel followed by the same letter do not differ significantly (P>0.05).