Fig. 1 in Phenotypic plasticity associated to environmental hypoxia in the neotropical serrasalmid Piaractus mesopotamicus (Holmberg, 1887) (Characiformes: Serrasalmidae)

Fig. 1. Development and reversion of the three morphological variables exposed to nine hours of hypoxia, followed by three hours of normoxia in Piaractus mesopotamicus. (a) lower lip, (b) maxillary, and (c) opercular valve. Capital letters above box plots indicate groups in multiple comparisons (Tukey's tests) after repeated measures ANOVA.