Fig. 5 in Dermal lip protuberances associated with aquatic surface respiration in juveniles of the piscivorous characid Salminus brasiliensis (Actinopterygii: Characidae)

Fig. 5. Mean monthly water temperature (solid line) and dissolved oxygen (dotted line) at the floodplain site of Salado River sampled during 2004 and 2005. Arrows indicate the dates with occurrence of individuals with dermal lip protuberances.