| Remarks |
Gymnotus chaviro inhabit pools and runs
of small terra firme streams as they enter the floodplain, and the vegetated margins of flooplain lakes, with substrates of leaf litter and organic rich mud. Specimens are most dense in submerged stems and roots of aquatic grasses (e.g., Oryza spp.) and floating macrophytes (e.g., Eichornia crassipes). At the period of low water (August) when collections were made, specimens were very abundant, aggregated closely together, and were not distributed into discrete territories. The holotype was collected in a small terra firme stream (1.2 m deep, 2.5 m wide, 25°C) with a muddy bottom and deeply undercut banks, about 1 km from the edge of the floodplain (Ref. 83382). |