Abstract

The fish species herein presented were collected in streams, swamps and rivers of the rio Ibirapuitã basin, middle rio Uruguay basin, in the Environmental Protection Area of Ibirapuitã. Samplings resulted in 72 species distributed in 51 genera, 21 families, and six orders. This study represents the first fish survey in the EPA of Ibirapuitã (Pampa biome).

Highlights

  • The number of fish species in the rio Uruguay basin is still unclear, but in a recent study Malabarba et al (2009) estimated 175 described species plus 50 undescribed species

  • The Environmental Protection Area (EPA) of Ibirapuitã is located on the international border Brazil-Uruguay, in the West region of the State of Rio Grande do Sul, and its southern limit coincides with the Brazilian international limit

  • Fishes were collected under IBAMA (Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis) permits, process number 26609-1

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Summary

Introduction

The number of fish species in the rio Uruguay basin is still unclear, but in a recent study Malabarba et al (2009) estimated 175 described species plus 50 undescribed species (about 20% of that total). The rio Ibirapuitã is one of main tributaries of the rio Ibicuí drainage (the largest drainage of the rio Uruguay basin) and fish inventories are nonexistent. Information about fish diversity from the rio Ibicuí is scarce (Bossemeyer et al 1985; Copatti et al 2009; Weis et al 1983). The EPA of Ibirapuitã is located on the international border Brazil-Uruguay, in the West region of the State of Rio Grande do Sul, and its southern limit coincides with the Brazilian international limit. The climate in the region is subtropical characterized by rainy winter and hot summer

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