Check List 17(6): 1593-1600, doi: 10.15560/17.6.1593

Ichthyofauna associated with sandy beaches of the rio Machado, tributary of the rio Madeira, northern Brazil

Igor David da Costa^‡§, Natalia Neto dos Santos Nunes^|, Ilana Rosental Zalmon^¶

‡ Universidade Federal Fluminense, Instituto do Noroeste Fluminense de Educação Superior, Santo Antônio de Pádua, Brazil§ Universidade Federal de Rondônia, Mestrado Profissional em Gestão e Regulação de Recursos Hídricos, Ji-Paraná, Brazil| Universidade Federal de Rondônia, Programa de Pós-Graduação em Ciências Ambientais, Rolim de Moura, Brazil¶ Universidade Estadual do Norte Fluminense, Laboratório de Ciências Ambientais, Campos dos Goytacazes, Brazil

Corresponding author: Igor David da Costa ( igorbiologia@yahoo.com.br )

Academic editor: Mariangeles Arce H.

This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Citation: Costa ID, Nunes NNS, Zalmon IR (2021) Ichthyofauna associated with sandy beaches of the rio Machado, tributary of the rio Madeira, northern Brazil. Check List 17(6): 1593-1600. https://doi.org/10.15560/17.6.1593

Abstract

The rio Machado is an large tributary of the rio Madeira, and investigations of the ichthyofauna are urgent given the current high threat of habitat loss on account of a hydroelectric plant under construction. Our inventory quantified 9,544 specimens, representing four orders and 38 species. Our study provides an unprecedented list of fish species from a poorly studied South American basin. This basin, which is considered one of the world’s biodiversity hotspots, presents high endemism, few cases of co-existence of phylogenetically related lineages, low species diversity, and few species occurrences with wide distribution.

Keywords

Amazon, inventory, Machado river basin, Neotropical region, species diversity