Fig 1.
(a) Zebrafish groups with recent experience in a more-complex environment (black bars) also shoaled more closely together than did fish with recent experience in a less-complex environment (gray bars). This pattern was weaker in one novel assay context (No PVC) than in the other, yielding a significant interaction effect (F1,28 = 4.9, P < 0.04). Error bars represent ± 1 standard error. (b) Zebrafish in tighter shoals (with smaller group diameters) charged more frequently, such that there was a moderate negative relationship between Group Diameter and Charge Rate.