SPECIFIC DIVERSITY, DENSITY AND BIOMASS OF THE ICTIOFAUNA IN THE UPPER ARROIO FELIZARDO, MEDIUM RIVER URUGUAI BASIN, URUGUAIANA, RS, BRAZIL

Authors

  • Claudia Azevedo
  • Edward Pessano
  • Diego Tomassoni
  • Marcus V. Querol
  • Enrique Querol

Abstract

The work has identified, seasonally, the species of fish that occur in the upper Arroio Felizardo, Uruguaiana, Rio Grande Do Sul, determining the density and biomass of its populations. The capture of specimens, was realized through the electric fishing technique, with three efforts consecutive (Lobón-cerviá, 1991), and quantified with aid of the ZIPPIN method (ZIPPIN, 1958). 27 species have been captured pertaining to 11 families. The Family CHARACIDAE presented greater diversity, with 9 species; the families CRENUCHIDAE, ERYTHRINIDAE, LORICARIIDAE, PARODONTIDAE, PIMELODIDAE, POECILLIDAE and SYMBRANCHIDAE, have presented the lesser diversity, with only one captured species. The data demonstrate a similar diversity in relation to other works with the same technique, for the Arroio Imbaá, next to the spring; it has been registered 27 species, distributed in 11 families (SAUCEDO, 2001). While in the Salso de Baixo little stream they are registered 26 species distributed in 10 families (MANSILHA, 1999).

Published

2008-01-16

Issue

Section

Articles