Figure 1
From: Biotelemetry reveals migratory behaviour of large catfish in the Xingu River, Eastern Amazon

Study area in the Xingu River and some tributaries. Fixed monitoring stations with acoustic and radio telemetry (red circles). Numbers indicate zones and colors denote the zone limits. Radio tracking by boat and aircraft was conducted throughout the study area to complement the passive monitoring. Map generated in Quantum GIS ver 2.18. QGIS Development Team (2016). QGIS Geographic Information System. Open Source Geospatial Foundation Project. http://qgis.osgeo.org.