Fig. 5. Mean values (+S.D., N=4–10) for fish alignment or schooling (a), erratic
behaviour (b) and tailbeat frequency (c) of smolts observed at the freshwater farms and
aboard the Sterling Carrier when the vessel was dockside, underway for 2 h and when
fish were being sampled from the hold while the vessel was underway. Dissimilar
superscript letters indicate statistically significant (α=0.05) differences within the same
group (from the same freshwater farm), and asterisks indicate significant differences
(Pb0.05) between groups at a given sample point.