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Santa Ana, Misiones, Argentina Biotope. Fishes: • Geaophagus sveni • Hyphessobrycon callistus • Corydoras polysticus • Corydoras paleatus Plants: • Pistia stratiodes • Eichhornia crassipes • Salvinia biloba Biotope Description: The predominant substrate is the river sand, with some basaltic stones and pieces of sunken trees, some leaves of land plants in the process of decomposition. Description of the area surrounding the biotope: The Paraná River runs throughout the province of Misiones. Where its landscape changes from large ravines with stones to beautiful beaches of natural sand. In this case, the represented biotope is specifically located in the city of Santa Ana, located 40 km from the capital of the province (Posadas). In this part of the river we find coasts with a large amount of sand and in small quantities, but also small volcanic rocks. The depth is varied, but a few meters from the coast and on these beaches, it does not exceed 60 cm. As for the vegetation, we find meadows and shrubs typical of the coastal areas of the Paraná River Description of the underwater landscape of the biotope: The underwater landscape is formed by a sandy bottom, in which we can see volcanic rocks of different sizes. The predominant substrate is river sand. You can see how fish look for food by stirring the sand. There are also trunks and branches, due to flooding when the river takes them. The depth in this part is about 60 cm, and the water is very calm. As for aquatic plants, we can find floating plants such as: Pistia stratiotes, Eichhornia crassipes, Salvinia biloba, we also find Nymphoides indica. The aquatic fauna of the Paraná River is very wide, in its coasts we find cichlids such as Geophagus sveni, Gymnogeophagus balzani, Bujurquina vittata, also varieties of tetras such as Hyphessobrycon callistus, Moenkhausia dichroura. Bottom fish are Ancistrus sp. Paraná, Corydoras paleatus and Corydoras polystictus. The invertebrates are Palaemonetes argentinus Description of habitat parameters: pH 7.1, GH: 4 KH: 3 Temperature: 22-28 ° C Conductivity: 74 HS / cm
