Fig. 3 in Calcium fluxes in Hoplosternum littorale (tamoatá) exposed to different types of Amazonian waters

Fig. 3. Net Ca2+ fluxes of Hoplosternum littorale transferred from black water (BW) to acidic black water pH 3.5 (ABW) or white water (WW) (a), and fish transferred from ABW to BW or WW (b) and fish transferred from WW to BW or ABW (c). The first bar in the left side of the figure represents the 2-4 h flux of the first exposure. Data expressed as mean ± SEM. Positive values indicate net influxes and negative values net effluxes. Asterisks (*) indicate significantly different from the same group 2 h after transfer by Kruskall- Wallis ANOVA and Mann-Whitney test (P <0.05). Crosses (+) indicate significantly different from the previous water condition by Kruskall-Wallis ANOVA and Mann-Whitney test (P <0.05).