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1. Flow characteristics in tailrace: understanding how hydrodynamics may attract fish to hydropower plant in South America

Author:
Santos, Hersília A.; Duarte, Bernardo; Pinheiro, Abgail; Cruz, Deborah; Souza, Guilherme
Source:
Marine & freshwater research 2018 v.69 no.12 pp. 1962-1973
ISSN:
1323-1650
Subject:
Pimelodus; Prochilodus; dynamic models; fish; fisheries; hydrodynamics; rivers; spillways; swimming; turbines; water power; Brazil
Abstract:
... Hydropower plant (HPP) operation may influence downstream flow regimes, which can affect the fish movement. In South America, tailrace fisheries are often killed or injured when interacting with spillways and turbines. Hydrodynamic flow-pattern studies are essential to facilitate mitigation. We developed a computational fluid dynamics model to investigate flow downstream of Três Marias HPP (Brazil ...
DOI:
10.1071/MF18135

2. Long-term study of reservoir cascade in south-eastern Brazil reveals spatio-temporal gradient in fish assemblages

Author:
Loures, Raquel Coelho; Pompeu, Paulo Santos
Source:
Marine & freshwater research 2018 v.69 no.12 pp. 1983-1994
ISSN:
1323-1650
Subject:
basins; fish; habitats; herbivores; introduced species; inventories; lotic systems; migratory behavior; migratory species; monitoring; species richness; water power; watersheds; Brazil
Abstract:
... In reservoir cascades, effects on fish assemblages are expected to strengthen over time and transfer from one reservoir to an adjacent one. To test this, fish-assemblage data from 23 years of monitoring in the Araguari reservoir cascade system, upper Paraná River basin, were analysed. The results showed a clear reduction in richness of native and migratory fish species and an increase of non-nativ ...
DOI:
10.1071/MF18109

3. Stress indicators for Prochilodus lineatus (Characiformes: Prochilodontidae) breeders during passage through a fish ladder

Author:
Bido, Adriane F.; Urbinati, Elisabeth C.; Makrakis, Maristela C.; Celestino, Leandro F.; Serra, Mônica; Makrakis, Sergio
Source:
Marine & freshwater research 2018 v.69 no.12 pp. 1814-1821
ISSN:
1323-1650
Subject:
Prochilodus lineatus; adults; body weight; cortisol; dams (hydrology); females; fish; fish ladders; glucose; hematocrit; lactic acid; males; migratory behavior; rivers; Brazil
Abstract:
... This study investigated whether fish ladder transposition is a stressful event for the streaked prochilod, Prochilodus lineatus, in a dam on the Upper Paraná River, Brazil. Bodyweight, standard length and plasma concentrations of cortisol, glucose, lactate, chloride and haematocrit were measured in 48 adult fish (male and female) that were sampled downstream and upstream of the dam and on the fish ...
DOI:
10.1071/MF18087