Fig 1.
Mean (±S.E., n = 3 tanks) swimming activity (a), feeding activity (b), number of prey within the gut (c) and trypsin activity (d) versus age (days post hatch, dph) for yolk sac larval herring (Clupea harengus) reared in the absence and presence of Rhodomonas baltica (RB) + Oxyrrhis marina (OX).
The black arrow indicates the age of complete yolk absorption. Significant differences between treatments were observed in feeding activity (panel b, P = 0.01, one-way repeated measures ANOVA on ranks).
Fig 2.
Mean (±S.E., n = 3 tanks) standard length (a), dry weight (b) and standardized RNA-DNA ratio (c) versus age (days post hatch, dph) in yolk sac larval herring (Clupea harengus) reared in the absence or presence of microalgae (RB) and protists (OX).
Significant differences between treatments were observed in standard length (panel a, P = <0.001, one-way repeated measures ANOVA on ranks) and dry weight (panel b, P = <0.001, one-way repeated measures ANOVA). The black arrow indicates the age of complete yolk absorption. The letter ‘I’ represents the initial (common) measurement at 0 dph.