A challenge model for pancreas disease in A tlantic salmon, S almo salar L . fry, was developed comparing two salmonid alphavirus ( SAV ) subtypes: SAV 1 and SAV 5. Viral doses of 3 × 10 5 TCID 50 mL −1 for SAV 1 and 3 × 10 4 for SAV 5 were tested in triplicate tanks, each containing 450 salmon fry. Cumulative mortalities of 1.2% were recorded. Titres of virus recovered from the mortalities ranged from 10 2 to 10 7 TCID 50 mL...

To assess how flow affects school structure and threat detection, startle response rates of solitary and small groups of giant danio Devario aequipinnatus to visual looming stimuli were compared in flow and no‐flow conditions. The instantaneous position and heading of each D. aequipinnatus was extracted from high‐speed videos. Behavioural results indicate that (1) school structure is altered in flow such that D. aequipinnatus...