Figure 2
From: Positive effects of bubbles as a feeding predictor on behaviour of farmed rainbow trout
Median (quartiles: 25%, 75%) percentage of fish group activity (% of differing pixels between two successive images) in the bubble area on the day 12 of conditioning. “During bubbles” represents the 15 s of bubble diffusion + 5 s of time gap for all treatments. “Neutral period” represents 6-min periods with no feed delivery or bubble diffusion. The black point inside boxes represents the mean value (Tukey post-hoc test).
