Fig. 4 in Upstream and downstream migration speed of Prochilodus costatus (Characiformes: Prochilodontidae) in upper São Francisco basin, Brazil

Fig. 4. Comparison of average downstream migration speeds of Prochilodus costatus in the São Francisco River between a. males and females, b. river stretches, and c. fish captured in the Pará River and São Francisco River in S2. Bars represent the standard deviation. Different letters denote significant differences in migration speed. S1 and S2: river stretches.