Downstream impacts of a dam and influence of a tributary on the reproductive success of Leporinus reinhardti in São Francisco River

Abstract

AB Aquatic Biology Contact the journal Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections AB 19:195-200 (2013) - DOI: https://doi.org/10.3354/ab00531 NOTE Downstream impacts of a dam and influence of a tributary on the reproductive success of Leporinus reinhardti in São Francisco River André Alberto Weber1, Diego Mendes Ferreira Nunes1, Rafael Zeferino Gomes1, Elizete Rizzo2, Kléber Biana Santiago3, Nilo Bazzoli1,* 1Laboratório de Ictiologia, Programa de Pós-graduação em Zoologia de Vertebrados da Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil 2Departmento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil 3Centro Integrado de Recursos Pesqueiros e Aquicultura de Três, CODEVASF, Minas Gerais, Brazil *Corresponding author. Email: bazzoli@pucminas.br ABSTRACT: Downstream impacts of dams on fish fauna are poorly studied, despite causing thermal and hydrological changes that affect the reproductive activity of the fish community. The present study aims to evaluate the reproduction of Leporinus reinhardti in 2 sections of the São Francisco River, Brazil, downstream from the Três Marias Dam. Section 1 (S1) is the first 34 km downstream from Três Marias Dam and section 2 (S2) is 34 to 54 km downstream from the dam, where the São Francisco River receives a mid-sized tributary called the Abaeté River. In S1, the values of temperature, dissolved oxygen and flow were lower than those obtained in S2. In S1, females and males did not complete reproduction, a fact proven by the absence of spawned females and males. In S2, reproductive success was proven due to the presence of spawned females and males. Furthermore, the values of total length, body weight, gonadosomatic index, fecundity and vitellogenic oocytes were statistically higher than those obtained in S1. The canonical correlation test indicated that the reproduction of females is more dependent on environmental factors than that of males. In S2, L. reinhadti found appropriate conditions for reproduction, probably influenced by the Abaeté River, confirming the need of preserving this tributary for the reproductive success of this species. KEY WORDS: Downstream impacts · Tributary · Leporinus reinhardti · São Francisco River · Spawning Full text in pdf format PreviousCite this article as: Weber AA, Ferreira Nunes DM, Zeferino Gomes R, Rizzo E, Biana Santiago K, Bazzoli N (2013) Downstream impacts of a dam and influence of a tributary on the reproductive success of Leporinus reinhardti in São Francisco River. Aquat Biol 19:195-200. https://doi.org/10.3354/ab00531 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AB Vol. 19, No. 2. Online publication date: October 08, 2013 Print ISSN: 1864-7782; Online ISSN: 1864-7790 Copyright © 2013 Inter-Research.