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Effects of the cochineal red additive on tail-beating force of zebrafish larvae (4, 5, and 6 d.p.f.). Zebrafish larvae (5 and 6 d.p.f.) showed a transit change in the tail-beating force hydrodynamically with effective test samples in each experimental group. Significant differences between the control and the exposure groups are indicated by asterisks, (* p < 0.05) and (** p < 0.01) as compared with the control for 4, 5 d.p.f. (N = 10), and 6 d.p.f. (N = 30).
