Caracterização da assembléia de peixes do rio São Bartolomeu, afluente do rio corumbá, bacia do rio Paranaíba, Goiás, Brasil.

Abstract

INTRODUCTION: This study was conducted in the São Bartolomeu River, a tributary of the Corumbá River in the Paraná Basin, in the municipalities of Luziânia, Cristalina, and the Federal District (Midwest). Six collections were carried out from January 2021 to August 2022. OBJECTIVES: The main objective was to inventory the ichthyofauna present in the São Bartolomeu River. METHODOLOGY: Sampling campaigns were conducted during both the rainy and dry seasons, with a five-day sampling effort in the field for each campaign. Eight sampling points were defined for the collection of ichthyological material using gill nets with dimensions of 10 m in length x 2 m in width, and mesh sizes of 12, 15, 25, 30, 40, 50, 60, and 70 mm between knots. One net of each mesh size was used, making up a set of eight nets. Additionally, trawl nets, dip nets, and cast nets were used to complement the data. RESULTS: In terms of observed richness, 37 species were identified. The most abundant species were Astyanax lacustris (yellow-banded astyanax), Psalidodon fasciatus (red-banded astyanax), Hypostomus regani (catfish), Galeocharax gulo (dogfish), Steindachnerina insculpta (whitefin), Megaleporinus obtusidens (piapara), and Prochilodus lineatus (curimata-pacu). CONCLUSION: The importance of preservation for the conservation of the species present in the São Bartolomeu River was demonstrated.