Occurrence record of two potamotrigonids species in the Upper Paraná River and some aspects about their biology

Authors

  • Domingos Garrone Neto Universidade Estadual Paulista, Instituto de Biociências, Departamento de Zoologia
  • Vidal Haddad Jr. Universidade Estadual Paulista, Faculdade de Medicina, Departamento de Dermatologia e Radioterapia
  • Maria José Alencar Vilela Universidade Federal de Mato Grosso do Sul, Departamento de Ciências Naturais
  • Virgínia Sanches Uieda Universidade Estadual Paulista, Instituto de Biociências, Departamento de Zoologia

Keywords:

geographic distribution, biological invasions, freshwater stingrays, Potamotrygonidae, Paraná River

Abstract

The freshwater stingrays of the Potamotrygonidae family are elasmobranchs restricted to the major river systems of South America. In Brazil, the occurrence of potamotrigonids is known in all the Amazonian Basin, some rivers of the Northeastern region and in the Paraguay-Paraná Basin. The upper course of the Paraná River, separated in the past from the medium and low courses by Sete-Quedas Waterfalls, today is connected to these areas due to the dams constructed in great part of its course. The dams had destroyed natural barriers, making possible the dispersion of many species of aquatic organisms to the headwaters of the Paraná River. We report the occurrence record of two species of stingrays in the Upper Paraná River, which were not part of native fauna about two decades ago.

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Published

2007-01-01

How to Cite

Garrone Neto, D., Haddad Jr., V., Vilela, M. J. A., & Uieda, V. S. (2007). Occurrence record of two potamotrigonids species in the Upper Paraná River and some aspects about their biology. Biota Neotropica, 7(1). Retrieved from //www.biotaneotropica.org.br/BN/article/view/264

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Section

Short Communications
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