Data/hora: 10/06/2024 03:47:33

Provedor de dados: | 49
País: | Brazil
Título: | Longitudinal patterns of fish assemblages in mountain streams from tropical forest biome
Autores: | Silva,João Fernando Marques da; Raio,Cibele Bender; Bernardino,Débora Fernandes Silva; Bennemann,Sirlei Terezinha.
Data: | 2013-09-01
Ano: | 2013
Palavras-chave: | Ichthyofauna; Freshwater fishes; Neotropical fishes; Low order streams; Tibagi river basin.
Resumo: | 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, João 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000300064
Editor: | Instituto Virtual da Biodiversidade | BIOTA - FAPESP
Relação: | 10.1590/S1676-06032013000300008
Formato: | text/html
Fonte: | Biota Neotropica  v.13 n.3 2013
Fonte: | info:eu-repo/semantics/openAccess