Artigo
Longitudinal patterns of fish assemblages in mountain streams from tropical forest biome
Registro en:
Biota Neotropica. Campinas: Revista Biota Neotropica, v. 13, n. 3, p. 64-73, 2013.
1676-0603
S1676-06032013000300008
WOS:000328238200009
S1676-06032013000300008.pdf
Autor
Marques da Silva, Joao Fernando
Raio, Cibele Bender [UNESP]
Silva Bernardino, Debora Fernandes
Bennemann, Sirlei Terezinha
Resumen
The aim of this study was to verify structure patterns in fish assemblages in mountain streams of the Rio Tibagi basin through the characterization of spatial and temporal variations in the composition of fish species. Samples were collected in three segments of the Varanal, Joao Pinheiro and Rio Preto streams. We collected 1154 specimens belonging to 21 species. The most abundant orders were Characiformes (59.01 +/- 2.84%) and Siluriformes (39.34 +/- 2.82%). Phalloceros harpagos was the most abundant species with 433 individuals, followed by Trichomycterus aff. davisi, with 292 individuals. No temporal variations (between seasons) were detected, but the cluster analysis suggests a separation of species composition between the segments closer to the headwaters and those more distant. The first two axes of the Canonical Correspondence Analysis (CCA) explained 80.09% of the variation in species abundance, and the variables that structured the fish assemblages in those streams were the stream width, depth, water speed, flow rate, conductivity and pH. Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Univ Estadual Londrina, Ctr Ciencias Biol, Dept Biol Anim & Vegetal, Lab Ecol Trof, BR-86051980 Londrina, PR, Brazil Univ Estadual Paulista Julio de Mesquita Filho UN, Inst Biociencias, Dept Morfol, Lab Biol & Genet Peixes, BR-18618970 Botucatu, SP, Brazil Univ Estadual Paulista Julio de Mesquita Filho UN, Inst Biociencias, Dept Morfol, Lab Biol & Genet Peixes, BR-18618970 Botucatu, SP, Brazil