Astyanax fasciatus as bioindicator of water pollution of Rio dos Sinos, RS, Brazil

Schulz, Uwe Horst; Martins-Junior, H.

doi:10.1590/s1519-69842001000400010

Cited by 65 publications

(47 citation statements)

References 16 publications

(15 reference statements)

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“…Colonisation, together with an intensive exploitation of natural resources, livestock farming, the use of fertilisers and agrochemicals and urbanisation have increased the amount of waste, domestic sewage and industrial effluents found in the aquatic ecosystems of this region (Denardin and Sulzbach, 2005), causing degradation of the water resources (Schuster and Souza-Franco, 2003;Dal Pissol and Souza-Franco, 2003;Bottin et al, 2007;Bonai et al, 2009). Organic pollution is a primary factor associated with the loss of diversity and the loss of ecological balance in an ecosystem (Meirelles-Pereira et al, 2005;Araújo and Tejerina-Garro, 2007;Schulz andMartins-Junior, 2001, McKie et al, 2009). The natural characteristics of the Santa Catarina western region (Schuster and Souza-Franco, 2003;Dal Pissol and Souza-Franco, 2003;Bottin et al, 2007;Bonai et al, 2009) have changed primarily because of pollution and deforestation.…”

Section: Introductionmentioning

confidence: 99%

Influence of urbanisation on water quality in the basin of the upper Uruguay River in western Santa Catarina, Brazil

et al. 2011

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AIM: The main objective of the study was to evaluate the limnological characteristics of rivers flowing through urban and rural areas in the upper Uruguay River basin in western Santa Catarina (SC), Brazil. METHODS: Sampling sites in the tributaries were selected along the longitudinal gradient and the different use of the soil in adjacent areas. Samples were collected bimonthly from March 2005 to August 2006. The following were analysed: depth, pH, electrical conductivity, dissolved oxygen concentration (DO), water temperature, chemical oxygen demand (COD), total alkalinity, ammonia, nitrite, nitrate and phosphorus were analysed. RESULTS: In most of the rivers analysed, we found a continuum from the spring to the river mouth that was characterised by a gradual increase in electrical conductivity, COD, phosphorus, alkalinity, nitrite and nitrate. However, an alteration from this pattern was found in rivers passing through urban areas. This deviation was due to high organic matter input poured into the rivers from these areas. CONCLUSIONS: Degraded riparian forest was observed along most of the bodies of water, which facilitates the entry of pollutants. Although the studied area suffers from intense farming activity (agriculture and livestock) and has the highest concentration of swine livestock in the country, the rivers that were most altered from their natural state were those that were influenced by sewage and industrial effluents from urban development.

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Section: Introductionmentioning

confidence: 99%

Influence of urbanisation on water quality in the basin of the upper Uruguay River in western Santa Catarina, Brazil

et al. 2011

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“…According to Schulz and Martins-Junior (2001), heavy metals from metallurgy and tanneries raise concerns, although a study of the Sinos River waters in the city of Novo Hamburgo conducted by Nascimento and Naime (2009) did not find any contamination by total chromium, nickel or lead in the samples analysed, differently from findings reported by Robaina et al (2002), who found lead, chromium and nickel in sediments of streams that flow into the Sinos River.Another study, conducted in 2007 and 2008 in four sites of the basin, found that the Sinos River was not proper for water catchment for human consumption, according to CONAMA Resolution no. 357, in the lower basin reach (Blume et al, 2010).…”

Section: Resultsmentioning

confidence: 87%

“…The presence of thermotolerant coliforms is not conclusive evidence that the greatest contribution to pollution at these sites is made by untreated household sewage, as this parameter indicates the presence of feces of warm blood animals. It is not possible to track the source of this pollution, which may also be associated with the economic activity in the region of Santo Antônio da Patrulha, Rolante and Taquara, where meat and dairy cattle are raised (Schulz and Martins-Junior, 2001).…”

Section: Resultsmentioning

confidence: 99%

Monitoring of metals, organic compounds and coliforms in water catchment points from the Sinos River basin

et al. 2015

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Unplanned use and occupation of the land without respecting its capacity of assimilation and environmental purification leads to the degradation of the environment and of water used for human consumption. Agricultural areas, industrial plants and urban centres developed without planning and the control of effluent discharges are the main causes of water pollution in river basins that receive all the liquid effluents produced in those places. Over the last decades, environmental management has become part of governmental agendas in search of solutions for the preservation of water quality and the restoration of already degraded resources. This study evaluated the conditions of the main watercourse of the Sinos River basin by monitoring the main physical, chemical and microbiological parameters described in the CONAMA Resolution no. 357/2005.The set of parameters evaluated at five catchment points of water human consumption revealed a river that has different characteristics in each reach, as the upper reach was class 1, whereas the middle and lower reaches of the basin were class 4. Monitoring pointed to households as the main sources of pollutants in those reaches, although metals used in the industrial production of the region were found in the samples analyzed.Keywords: water quality, Sinos River, land usage. Monitoramento de metais, compostos orgânicos e coliforms em pontos de captação de água da bacia hidrográfica do Rio dos Sinos ResumoO uso e ocupação do solo não planejados, sem respeitar sua capacidade de assimilação e de purificação ambiental, levam à degradação do ambiente e da água utilizada para consumo humano. Áreas agrícolas, plantas industriais e centros urbanos desenvolvidos sem planejamento e controle de descargas de efluentes são as principais causas de poluição da água em bacias hidrográficas que recebem todos os efluentes líquidos produzidos naqueles lugares. Nas últimas décadas, gestão ambiental tornou-se parte das agendas governamentais em busca de soluções para a preservação da qualidade da água e a restauração de recursos já degradadas. Este estudo avaliou as condições do curso de água principal da bacia do Rio dos Sinos, monitorando o principal físico, químico e microbiológicos parâmetros descritos na Resolução CONAMA n.º 357/2005. O conjunto de parâmetros avaliados em cinco pontos de captação de água para consumo humano revelou um rio que tem características diferentes em cada alcance, como o superior chegar era classe 1, Considerando que o atinge médio e inferior da bacia foram classe 4. monitoramento apontado famílias como as principais fontes de poluentes naqueles atinge, apesar de metais utilizados na produção industrial da região foram encontrados nas amostras analisadas.Palavras-chave: qualidade da água, Rio dos Sinos, uso do solo.

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“…Aquatic ecosystems, in particular, have been significantly altered as a result of multiple environmental impacts caused by human activities such as mining, construction of dams and reservoirs, diversion of the natural course of rivers, discharge of raw sewage and industrial effluents, deforestation and inappropriate land use in riparian areas and floodplains, overfishing, introduction of exotic species, among others (OLIVEIRA; BENNEMANN, 2005;SCHULZ;MARTINS-JUNIOR, 2001). …”

Section: Introductionmentioning

confidence: 99%

Influence of environmental quality on the diet of Astyanax in a microbasin of central western Brazil

Souza

Lima-Júnior

2013

Actascibiolsci

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ABSTRACT. This study analyzed physicochemical characteristics of the water, degradation of the surroundings and the influence of these factors on the diet of two fish species of Astyanax in Tarumã stream microbasin, central western Brazil. Fish were collected in eight sites between 2007 and 2010, using gillnets and sieves. Environmental variables were evaluated by a principal component analysis and the diet based on Spearman's correlation. The variables width, type of riparian vegetation, pH, conductivity, total dissolved solids, temperature, oxidation and reduction potential, presence of waste, and altitude have separated the sampling sites into two groups: 'less impacted' and 'more impacted'. The two characid species presented omnivorous habit, typical of disturbed environments. The consumption of food resources was different over the space: terrestrial plants and sediment were more important in the most impacted sites for both species. And specifically to Astyanax altiparanae the order of importance of the food was distinct between most and less impacted sites. These data indicated that the diet of these species is a suitable tool for analyzing the environmental quality of the studied sites.Keywords: environmental degradation, streams, ichthyofauna, food.Influência da qualidade ambiental na dieta de Astyanax em uma microbacia do CentroOeste do Brasil RESUMO. Este trabalho teve como objetivo analisar as características físico-químicas da água, degradação do entorno e a influência destes fatores na biologia alimentar de duas espécies de Astyanax na microbacia Touro-Tarumã, Centro-Oeste do Brasil. Os peixes foram coletados em oito locais, de 2007 a 2010, utilizando redes de espera e peneirões. As variáveis ambientais foram avaliadas por análise multivariada e a dieta pela correlação de Spearman. As variáveis ambientais largura, tipo de mata ciliar, pH, condutividade, sólidos totais dissolvidos, temperatura, potencial de oxidação e redução, presença de lixo e altitude permitiram diferenciar os locais de coleta em "mais impactados" e "menos impactados". As duas espécies de caracídeos estudadas apresentaram comportamento onívoro, que é típico de ambientes alterados. Os recursos alimentares consumidos pelas espécies diferiram espacialmente: vegetais terrestres e sedimento apresentaram maior importância nos locais mais impactados para as duas espécies. Especificamente para A. altiparanae a ordem de importância do alimento consumido diferiu entre os locais mais e menos impactados. Estes dados indicam que o estudo da dieta destas espécies mostrou-se uma ferramenta adequada para análise da qualidade ambiental destes locais.Palavras-chave: degradação ambiental, riachos, ictiofauna, alimentação.

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Astyanax fasciatus as bioindicator of water pollution of Rio dos Sinos, RS, Brazil

Cited by 65 publications

References 16 publications

Influence of urbanisation on water quality in the basin of the upper Uruguay River in western Santa Catarina, Brazil

Influence of urbanisation on water quality in the basin of the upper Uruguay River in western Santa Catarina, Brazil

Monitoring of metals, organic compounds and coliforms in water catchment points from the Sinos River basin

Influence of environmental quality on the diet of Astyanax in a microbasin of central western Brazil

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