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Effects of the proximity from an industrial plant on fish assemblages in the rio Paraíba do Sul, southeastern Brazil Neotropical Ichthyology
Pinto,Benjamin Carvalho Teixeira; Peixoto,Magna Galvão; Araújo,Francisco Gerson.
This work aims to analyze changes in the fish assemblages along a longitudinal reaches of the rio Paraíba do Sul, one of the most used Brazilian aquatic systems, to assess the river "health" and to identify eventual recovery trends. Standardized monthly samplings were carried out at six sites, from October 1997 to September 1999, using casting, sieves, seine and gill nets. Three zones were searched: upstream (Z I), downstream (Z III) and nearby the source of pollution (Z II). Three univariate distribution methods were used: ABC (abundance-biomass curves), K-dominance curves, and geometric class's distribution. Additionally, cluster analysis was applied to detect eventual patterns. The ABC and K-dominance curves showed Z II with evident indication of stress...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish community; Neotropical fauna; Pollution; Water quality; ABC curves; Cluster analysis.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000200013
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Zooplankton communities as eutrophication bioindicators in tropical reservoirs Biota Neotropica
Gazonato Neto,Antonio José; Silva,Lidiane Cristina da; Saggio,Angelo Augusto; Rocha,Odete.
Eutrophication is a process characterized by an increase in the aquatic system productivity, which causes profound changes in the structure of its communities. Owing to the high environmental sensitivity of planktonic species, the study of their communities can indicate the deterioration of the environment. The Jaguari and Jacareí reservoirs are part of the Cantareira System, supplying water to São Paulo inhabitants and that has been affected by several forms of continuous human interference. Here we analyze some properties of the zooplankton community as bioindicators of eutrophication and water quality change. In situ physical and chemical measurements were carried out, water was collected for analysis and quantitative zooplankton samples were taken at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zooplankton; ABC curves; Calanoida/Cyclopoida ratio; Cantareira System; Environmental impact.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000400104
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