Hydrological attributes and rheophilic freshwater fish: stock assessment

Alves, Diego Corrêa; Minte-Vera, Carolina V.; Agostinho, Ângelo Antônio; Okada, Edson Kiyoshi; Vasconcelos, Lilian Paula

doi:10.1007/s11160-012-9298-y

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…However, the results obtained from the present study show that the capture of adult individuals has been reduced even in dam-free areas, including the 230-km stretch of the Paraná River from the Porto Primavera Dam to the Itaipu reservoir. The results presented here for this region indicate that prolonged flooding periods result in high abundance of YOYs, reinforcing the importance of these hydrological regime attributes as key factors for the species' conservation in Neotropical rivers (Cooke et al, 2012;Alves et al, 2013;Oliveira et al, 2015). The success of piracanjuba recruitment in this region is associated, in addition to flood pulse, to large tributaries of the Paraná River (the Iguatemi, Ivinhema, Piquiri and Ivaí Rivers) not regulated by dams (Affonso et al, 2015) and to three conservation units (Parque Nacional de Ilha Grande, Parque Estadual do Ivinhema, and Área de Proteção Ambiental das Ilhas e Várzeas do Rio Paraná).…”

Section: Discussionsupporting

confidence: 67%

“…These tributaries still maintain natural characteristics related to the flood regime, providing spawning sites and initial development areas for migratory fish (Bialetzki et al, 2005;Reynalte-Tataje et al, 2013;Silva et al, 2017). Long periods of flooding allow juveniles to reach sizes less susceptible to predation when they leave structured environments during water retraction and occupy main river channels (Agostinho et al, 2008;Alves et al, 2013). Among the 11 large migratory species found in the upper Paraná River Basin, the piracanjuba is considered to be the most dependent on prolonged flooding periods and to be the most sensitive to delays in their onset (Oliveira et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

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Conservation status and bio-ecology of Brycon orbignyanus (Characiformes: Bryconidae), an endemic fish species from the Paraná River basin (Brazil) threatened with extinction

et al. 2019

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Brycon orbignyanus is an endemic species from La Plata basin whose stocks have been presenting significant reductions throughout the Paraná River. Brycon orbignyanus is categorized as an endangered species. This study evaluated aspects of the bio-ecology of this species that may be related to this threat, highlighting its distribution, abundance, and diet as well as the corresponding relationships between its recruitment and flood regimes. Data were obtained from different parts of the upper Paraná River (stretches free and regulated by dams) from 1986 to 2010 with more detailed data collected from the free remnant of this basin. The results indicate that no records for species exist at more than half of the sampling points located in dam-regulated sections of the Paraná River, whereas specimens were collected from 75% sites in the free plain remnant. We observed a remarkable effect of the hydrological regime on recruitment as well as distinct food demands during ontogenetic development, with adults almost exclusively consuming fruits and seeds, revealing that these individuals are supported by riparian vegetation. Thus, it is concluded that changes in the natural flood regime as well as riparian vegetation removal threaten B. orbignyanus populations in the Paraná River basin.

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Section: Discussionsupporting

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Conservation status and bio-ecology of Brycon orbignyanus (Characiformes: Bryconidae), an endemic fish species from the Paraná River basin (Brazil) threatened with extinction

et al. 2019

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“…Furthermore, there is a well-developed body of literature on applications of BNs to freshwater ecosystems (e.g. Alves, Minte-Vera, Agostinho, Okada, & Vasconcelos, 2013;Anderson et al, 2012;Borsuk, Reichert, Peter, Schager, & Burkhardt-Holm, 2006;Peterson, Rieman, Dunham, Fausch, & Young, 2008).…”

Section: Bayesian Networkmentioning

confidence: 99%

Fish‐Net: Probabilistic models for fishway planning, design and monitoring to support environmentally sustainable hydropower

et al. 2018

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The construction of fishways for upstream and downstream connectivity is the preferred mitigation measure for hydropower dams and other riverine barriers. Yet empirical evidence for effective design criteria for many species is missing. We therefore assembled a group of international fishway designers and combined their knowledge with available empirical data using a formal expert elicitation protocol and Bayesian networks. The expert elicitation method we use minimizes biases typically associated with such approaches. Demonstrating our application with a case‐study on the temperate Southern Hemisphere, we use the resulting probabilistic models to predict the following, given alternative design parameters: (i) the effectiveness of technical fishways for upstream movement of migratory fish; (ii) habitat quality in nature‐like bypasses for resident fish; and (iii) rates of mortality during downstream passage of all fish through turbines and spillways. The Fish Passage Network (Fish‐Net) predicts that fishways for native species could be near 0% or near 100% efficient depending on their design, suggesting great scope for adequate mitigation. Sensitivity analyses revealed the most important parameters as follows: (i) design of attraction and entrance features of technical fishways for upstream migration; (ii) habitat preferences of resident fish in nature‐like bypasses; and (iii) susceptibility of fish to barotrauma and blade strike during turbine passage. Numerical modelling predicted that mortality rates of small‐bodied fish (50–100 mm TL) due to blade strike may be higher for Kaplan than Francis turbines. Our findings can be used to support environmentally sustainable decisions in the planning, design and monitoring stages of hydropower development.

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Effect of water quality parameters and climatic influences on reproductive phenology of Macrognathus pancalus in wetland ecosystem: recommending a long-term management approach and conservation policy

Rahman,

Sultana,

Ahmed

et al. 2024

Environ Monit Assess

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Hydrological attributes and rheophilic freshwater fish: stock assessment

Cited by 4 publications

References 28 publications

Conservation status and bio-ecology of Brycon orbignyanus (Characiformes: Bryconidae), an endemic fish species from the Paraná River basin (Brazil) threatened with extinction

Conservation status and bio-ecology of Brycon orbignyanus (Characiformes: Bryconidae), an endemic fish species from the Paraná River basin (Brazil) threatened with extinction

Fish‐Net: Probabilistic models for fishway planning, design and monitoring to support environmentally sustainable hydropower

Effect of water quality parameters and climatic influences on reproductive phenology of Macrognathus pancalus in wetland ecosystem: recommending a long-term management approach and conservation policy

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