Stream fish from recently deforested basins in the Meridional Amazon, Mato Grosso, Brazil

Authors

  • Lilian Casatti Universidade Estadual Paulista, Departamento de Zoologia e Botânica, Laboratório de Ictiologia https://orcid.org/0000-0002-2966-0905
  • Gabriel Lourenço Brejão Universidade Estadual Paulista, Departamento de Zoologia e Botânica, Laboratório de Ictiologia https://orcid.org/0000-0003-1488-4719
  • Fernando Rogério Carvalho Universidade Federal de Mato Grosso do Sul, Instituto de Biociências, Laboratório de Ictiologia https://orcid.org/0000-0002-2137-2255
  • Hugmar Pains da Silva Universidade Federal de Mato Grosso, Laboratório de Citogenética e Genética Animal, Instituto de Biociências https://orcid.org/0000-0003-3540-2889
  • María Angélica Pérez-Mayorga Universidade Estadual Paulista, Departamento de Zoologia e Botânica, Laboratório de Ictiologia https://orcid.org/0000-0002-9717-3658
  • Angelo Rodrigo Manzotti Universidade Estadual Paulista, Departamento de Zoologia e Botânica, Laboratório de Ictiologia https://orcid.org/0000-0003-4181-8645
  • Jaquelini de Oliveira Zeni Universidade Estadual Paulista, Departamento de Ecologia https://orcid.org/0000-0001-7438-4818
  • Bruno Martins Santos Ramires Universidade Estadual Paulista, Departamento de Zoologia e Botânica, Laboratório de Ictiologia
  • Francisco Langeani Universidade Estadual Paulista, Departamento de Zoologia e Botânica, Laboratório de Ictiologia https://orcid.org/0000-0001-7376-4798

Keywords:

inventory, neotropical ichthyofauna, deforestation, baseline, Characidae

Abstract

Abstract: The replacement of tropical forests to production systems is one of the leading causes of riverine ecosystem alterations. However, current assemblages’ composition may also result from the time since these transformations have begun. Therefore, the knowledge of diversified historical scenarios can facilitate the accomplishment of actions that involve the aquatic environments recovery. In this study, an inventory of stream fish was carried out in basins whose deforestation was intensified in the last 20 years, to compose a baseline for ecological and taxonomic studies. The habitat, physical and chemical variables, and the fish assemblages from 60 streams in the northwest region of the state of Mato Grosso, in the Aripuanã and Juruena river basins, were sampled with standardized procedures. For a total of 130 species, a numerical predominance of small-sized Characidae and great rarity were registered, with 50 species represented by less than ten individuals and 19 singletons. Approximately 15% of the sampled taxa were identified only at the generic level, and for several taxa, more detailed taxonomic and molecular studies are required in order to achieve satisfactory identifications. None threatened species were so far reported. On the other hand, two specimens of non-native species were sampled. Although habitat quality is higher in forested streams, no differences in the species richness were registered when compared to the pasture with riparian forest streams or to more deforested streams. However, abundance was greater in these last two streams groups as a result of small-sized characins dominance.

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Published

2020-01-01

How to Cite

Casatti, L., Brejão, G. L., Carvalho, F. R., Silva, H. P. da, Pérez-Mayorga, M. A., Manzotti, A. R., Zeni, J. de O., Ramires, B. M. S., & Langeani, F. (2020). Stream fish from recently deforested basins in the Meridional Amazon, Mato Grosso, Brazil. Biota Neotropica, 20(1). Retrieved from //www.biotaneotropica.org.br/BN/article/view/1708

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