Morphometrics analysis inThoracocharax stellatus (Kner, 1858) (Characiformes, Gasteropelecidae) from different South American river basins

Authors

  • Edson Lourenço da Silva Universidade Federal de Mato Grosso, Instituto de Biociências, Programa de Pós-Graduação em Ecologia e Conservação da Biodiversidade
  • Liano Centofante Universidade Federal de Mato Grosso, Instituto de Biociências, Departamento de Biologia e Zoologia
  • Carlos Suetoshi Miyazawa Universidade Federal de Mato Grosso, Instituto de Biociências, Departamento de Biologia e Zoologia

Keywords:

geographic variation, morphometry, canonical variables, silver hatchetfish

Abstract

A free-size canonical variable analysis was made to investigate the morphological pattern of variation among different Thoracocharax stellatus populations in South American river basins: Araguaia-Tocantins and Paraguay Basins Rivers from Brazil, and Orinoco's basin in Venezuela. Distinction among the samples from Araguaia-Tocantins and Orinoco were observed, with overlap of these populations with the Paraguay's basin samples. The primarily characters responsible for this discrimination are head length and dorsal fin length. The mechanisms that can act in this geographic variation among T. stellatus populations are discussed.
Issue Cover Vol.: 9 Num: 2

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Published

2009-06-01

How to Cite

Silva, E. L. da, Centofante, L., & Miyazawa, C. S. (2009). Morphometrics analysis inThoracocharax stellatus (Kner, 1858) (Characiformes, Gasteropelecidae) from different South American river basins. Biota Neotropica, 9(2). Retrieved from //www.biotaneotropica.org.br/BN/article/view/516

Issue

Vol. 9 No. 2 (2009): v9n2

Section

Articles

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