Structure and composition of the stream ichthyofauna of four tributary rivers of the upper Rio Parana basin, Brazil

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dc.contributor.authorCastro, RMC
dc.contributor.authorCasatti, L.
dc.contributor.authorSantos, H. E.
dc.contributor.authorVari, R. P.
dc.contributor.authorMelo, ALA
dc.contributor.authorMartins, LSE
dc.contributor.authorAbreu, T. X.
dc.contributor.authorBenine, R. C.
dc.contributor.authorGibran, F. Z.
dc.contributor.authorRibeiro, A. C.
dc.contributor.authorBockmann, F. A.
dc.contributor.authorCarvalho, M.
dc.contributor.authorPelicao, GZP
dc.contributor.authorFerreira, K. M.
dc.contributor.authorStopiglia, R.
dc.contributor.authorAkama, A.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionNatl Museum Nat Hist
dc.date.accessioned2014-05-20T14:03:19Z
dc.date.available2014-05-20T14:03:19Z
dc.date.issued2005-09-01
dc.description.abstractThe ichthyofauna of 24 stretches of streams, all of 100 m length and of fifth or lower order and most of second and third order, were sampled along four left bank tributaries (Rio do Peixe, Rio Aguapei, Rio Sao Jose dos Dourados, lower Rio Tiete of the main channel of the Rio Parana in the state of São Paulo, southeastern Brazil. Sampling of the fish fauna at each of the six sites in the four basins incorporated a standardized fish collecting methodology and a standardized documentation of environmental data serving as the basis for a comparative analysis of the collecting locations. The 8,189 fish specimens collected represented six orders, 18 families, 42 genera, and 56 species, with a total biomass of 28.8 kg. Approximately 52% of the collected species were characiforms, 28% siluriforms, 9% gymnotiforms, 5% cyprinodontiforms, 4% perciforms, and 2% synbranchiforms. The most abundant of the species were the characiforms Astyanax altiparanae (15% of total) and Knodus moenkhausii (12% of total). The two species with the largest overall biomasses were A. altiparanae (34% of total biomass) and the siluriform Hypostomus sp. (8% of total biomass). Analysis of the trophic structure of the studied ichthyofauna indicated that the 10 numerically dominant species across the 24 sampled streams can be grouped into five guilds that are in decreasing order of numerical importance: omnivores, insectivores, insectivores/invertivores, periphytivores, and algivores. Species richness in the sampled stream stretches varied from six to 20 species with an average richness of 14. The species richness estimated by extrapolation for all 24 sampled stream stretches was 67 species. The Characidae are predominant among the collected specimens with approximately 50% of both individuals and biomass, a fact hypothesized to be a function of several attributes typical of the family. Six of the 56 collected species were new to science and six other species are of indefinite taxonomic status and require further analysis in order to determine their identity.en
dc.description.affiliationUSP, FFCLRP, Dept Biol, LIRP, BR-14040901 Ribeirao Preto, Brazil
dc.description.affiliationUniv Estadual Paulista, IBILCE, Dept Zool & Bot, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.description.affiliationNatl Museum Nat Hist, Div Fishes, Dept Vertebrate Zool, Smithsonian Inst, Washington, DC 20560 USA
dc.description.affiliationUniv São Paulo, Museu Zool, BR-04299970 São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, IBILCE, Dept Zool & Bot, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.format.extent193-214
dc.identifierhttp://www.pfeil-verlag.de/04biol/pdf/ief16_3_01.pdf
dc.identifier.citationIchthyological Exploration of Freshwaters. Munich: Verlag Dr. Friedrich Pfeil, v. 16, n. 3, p. 193-214, 2005.
dc.identifier.issn0936-9902
dc.identifier.lattes8041011456158217
dc.identifier.urihttp://hdl.handle.net/11449/22310
dc.identifier.wosWOS:000231725300001
dc.language.isoeng
dc.publisherVerlag Dr. Friedrich Pfeil
dc.relation.ispartofIchthyological Exploration of Freshwaters
dc.relation.ispartofjcr0.783
dc.relation.ispartofsjr0,714
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.titleStructure and composition of the stream ichthyofauna of four tributary rivers of the upper Rio Parana basin, Brazilen
dc.typeArtigo
dcterms.licensehttp://www.pfeil-verlag.de/04biol/e9902d.php
dcterms.rightsHolderVerlag Dr. Friedrich Pfeil
unesp.author.lattes8041011456158217
unesp.author.orcid0000-0002-0892-9768[8]
unesp.author.orcid0000-0001-6881-5271[12]
unesp.author.orcid0000-0002-2812-8976[9]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt

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