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. 2019 Aug 20;7:e7546. doi: 10.7717/peerj.7546

Figure 6. Measures of zebrafish freezing behavior in the light-dark test.

Figure 6

Acute exposure to energy drink components (caffeine, taurine, or both) altered the total time spent immobile in the novel tank test in adult zebrafish. Caffeine increased the total time immobile in the light-dark test. Bars indicate means of each group ±SEM. *, ** indicates significant (p < 0.05 and p < 0.01, respectively) difference from respective non-caffeine treated control (Tukey post hoc).