To what extent are the fish compositions of a regulated river related to physico-chemical variables and habitat structure?

Mattos, Tailan Moretti; Costa, Marcus Rodrigues da; Pinto, Benjamin Carvalho Teixeira; Borges, Joyce L. C.; Araújo, Francisco Gerson

doi:10.1007/s10641-013-0175-x

Cited by 11 publications

(9 citation statements)

References 36 publications

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“…Physico-chemical variables showed little variation among sites and, as a result there was no significant relationship between the abundance, distribution and community composition of fishes and the physico-chemical environment of sampling sites. This is consistent with observations that in regulated rivers, physico-chemical variables have little influence on structuring of fish assemblages when compared to the effects Mattos et al, 2014). River regulation, in terms of barriers, appeared to be a far greater determinant of species composition and distribution in the Baakens River, particularly for migrating fishes of marine origin.…”

Section: Discussionsupporting

confidence: 89%

Fish community of a small, temperate, urban river in South Africa

Muller¹,

Strydom²,

Weyl³

2015

WSA

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Freshwater and marine-spawned fishes were sampled from the Baakens River, a small urban river that runs through the city of Port Elizabeth in the Eastern Cape of South Africa. Using fyke nets, 8 sites were sampled along the river course over a 4-month period (January -April 2014). Catches were comprised of indigenous freshwater, marine migrant and alien fishes. Marine migrant fishes, including catadromous species dependent on freshwater for early life-history strategies, were significantly affected by instream barriers which prohibited upstream migration of all species except Anguilla mossambica. The freshwater fish fauna was dominated by Tilapia sparrmanii and Pseudocrenilabrus philander, species that are alien to the Baakens River. While indigenous Barbus pallidus and Sandelia capensis were both abundant and widely distributed in the river, only two Pseudobarbus afer were sampled from one survey site. The low abundance and narrow distribution of this endangered species is of concern and human-mediated impacts on this species require urgent evaluation and mitigation.

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Section: Discussionsupporting

confidence: 89%

Fish community of a small, temperate, urban river in South Africa

Muller¹,

Strydom²,

Weyl³

2015

WSA

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“…Low turbidity values (3-97 NTU) were also observed in other studies of rivers in this state (Petry & Schulz, 2006;Salomoni et al, 2006;König et al, 2008;Blume et al, 2010;Pimenta et al, 2012;Panizzon et al, 2013). High turbidity is associated with a lack of marginal vegetation and deforested areas that favor runoff of sediment during rainy periods (Wachholz et al, 2011;Mattos et al, 2014). The turbidity values recommended by Conselho Nacional do Meio Ambiente (CONAMA-2005) are up to 100 NTU (around 69-81 mg L -1 depending on the type of sediment).…”

Section: +supporting

confidence: 58%

“…Water quality can be affected by several factors, such as climate, size of the watershed, topography, geology, rain and soil type (Wachholz et al, 2011;Gaida et al, 2012;Mattos et al, 2014). Previous analysis of water from ponds and streams from Rio Grande do Sul presented mean pHs similar to those found in the different regions of this study (Rheinheimer & Souza, 2000;Diel et al, 2007;König et al, 2008;Pimenta et al, 2012;Silva et al, 2012), but in water used for human consumption from artesian wells, from the north central region minimum pH values were down to 4.4 and the maximum up to 10.0 (Rheinheimer & Souza, 2000).…”

Section: Discussionmentioning

confidence: 99%

“…Periods of higher turbidity in southern Brazil are usually associated with periods of soil preparation for soy (September-November) and wheat (April-May) cultivation (Wachholz et al, 2011), in which there is no vegetation covering the soil (Gaida et al, 2012). There are no studies analyzing the relationship between turbidity and growth in native fish species, but white sea catfish (Genidens barbus) and piava (Leporinus copelandii) were associated with turbidity levels of 200-266 NTU, whereas two spot astyanax (Astyanax bimaculatus) and lambari (Astyanax parahybae) were found at up to 83 NTU in the Guandu River, in southeast Brazil (Mattos et al, 2014). Piscivorous fish adapted to visual hunting, as in Cynodontidae, prefer clear water (Melo et al, 2009).…”

Section: +mentioning

confidence: 99%

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Freshwater parameters in the state of Rio Grande do Sul, southern Brazil, and their influence on fish distribution and aquaculture

et al. 2016

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This study analyzed the relationship between several water quality parameters (pH, hardness, alkalinity, turbidity, iron and manganese) levels measured over a 16 year period with fish distribution and aquaculture in the state of Rio Grande do Sul, Southern Brazil. The mean pH values were within a neutral range (6.5-7.5), but the maximum and minimum values reached inappropriate levels for fish farming in some cities. Alkalinity levels were very low (except in the southwest region of the state), which may have contributed to pH variation. Hardness, turbidity, iron (except the region near Caçapava do Sul City) and manganese were within safe ranges for fish farming; however, turbidity levels occasionally increased to levels outside the safe range. In conclusion, the water quality in the Rio Grande do Sul, in general, can be considered adequate for aquaculture, but the fish farmers must be aware of the methods to reduce turbidity, such as the use of calcium sulfate.Este estudo analisou a relação entre vários parâmetros de qualidade da água (pH, dureza, alcalinidade, turbidez, ferro e manganês durante 16 anos) com a distribuição de peixes e piscicultura no estado do Rio Grande do Sul, Brasil. O pH ficou em média em uma faixa neutra (6,(5)(6)(7)5), mas valores máximos e mínimos atingiram níveis não apropriados para a piscicultura em algumas cidades. Os valores de alcalinidade foram baixos (exceto na região sudoeste do estado), o que poderia contribuir para oscilações no pH. Dureza, turbidez, ferro (exceto na região próxima à cidade de Caçapava do Sul) e manganês ficaram dentro de níveis aceitáveis para a piscicultura, mas a turbidez ocasionalmente elevou-se a níveis fora dessa faixa aceitável e os piscicultores devem ter algum mecanismo para reduzi-los. Em conclusão, de forma geral a qualidade da água do Rio Grande do Sul pode ser considerada adequada para a aquicultura, mas os piscicultores devem conhecer métodos para corrigir a turbidez, como a utilização de sulfato de cálcio.

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“…In fact, ecological flow should be a time series of discharge within a range, considering different life stages of target species and hydrological seasonality. The spawning habitat condition was vital to fish, which has been well documented (Knaepkens, Bruyndoncx, Coeck, & Eens, ; Mattos, Costa, Pinto, Borges, & Araújo, ; Thorstad, Økland, Aarestrup, & Heggberget, ). However, the feeding and overwintering habitat was important as well.…”

Section: Discussionmentioning

confidence: 91%

Incorporating fish habitat requirements of the complete life cycle into ecological flow regime estimation of rivers

et al. 2020

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Maintenance of ecological flow regime for aquatic biota is essential to river ecosystem health. To estimate ecological flow, habitat simulation methods have been widely applied because of their combination of hydrological regime and species hydraulic preference. However, few methods are available to provide a flow regime that varies over time due to time-specific habitat requirements from different target species or from one target species at its different life stages. This paper described a novel approach for evaluating the ecological flow regime that was a time series of discharge considering different life stages of target species. First, an ecohydraulic model that combined multivariable habitat suitability curve of target species with a hydraulic module was developed to establish the relationship between habitat status and hydrological conditions. Then, the habitat connectivity index was adopted to assess the spatial patterns of habitat patches. Finally, the ecological flow regime considering the complete life cycle of target species was derived. The developed approach was applied to the middle reach of Huaihe River, where the flow is highly regulated by dams and sluices. The Chinese bream (Parabramis pekinensis) was chosen as the target species for ecological flow calculation. The ecological flow regime in the Lutaizi was provided for the river management. The study provided a promising method to support ecological friendly operations of hydraulic structures for river ecosystem restoration and management. K E Y W O R D S ecohydraulic model, ecological flow regime, full life cycle, habitat connectivity

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To what extent are the fish compositions of a regulated river related to physico-chemical variables and habitat structure?

Cited by 11 publications

References 36 publications

Fish community of a small, temperate, urban river in South Africa

Fish community of a small, temperate, urban river in South Africa

Freshwater parameters in the state of Rio Grande do Sul, southern Brazil, and their influence on fish distribution and aquaculture

Incorporating fish habitat requirements of the complete life cycle into ecological flow regime estimation of rivers

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