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Título
Fishways as downstream routes in small hydropower plants: Experiences with a potamodromous cyprinid
Autor
Año del Documento
2021
Editorial
MDPI
Descripción
Producción Científica
Documento Fuente
Water, 2021, Vol. 13, Nº. 8, 1041
Abstract
Fish need to move upstream and downstream through rivers to complete their life cycles. Despite the fact that fishways are the most commonly applied solution to recover longitudinal connectivity, they are not considered viable for downstream migration. Therefore, alternative facilities are recommended to facilitate downstream migration. However, a few recent studies have disagreed with this general assumption, showing the potential for bidirectional movements. This study advances our understanding of the potential of fishways for downstream migration by studying their efficiency in a run-of-the-river hydropower plant in the Duero River (Spain). To achieve this, downstream movements of the Iberian barbel (n = 299) were monitored in a stepped fishway for two years with passive integrated transponder (PIT)-tag technology, considering the effect of fish origin and release zone. The results showed that 24.9% of barbels descended through the fishway, with the origin and release zone affecting the fishway location. In addition, downstream movements were observed throughout the whole year, except in winter. The study concludes that, under specific scenarios, fishways could act as safe alternative routes for downstream migration.
Materias (normalizadas)
Fish
Peces - Migración
Marine & Freshwater Sciences
Freshwater & Marine Ecology
Ecología de los cursos de agua
Hydraulics
Peces de agua dulce
Barbos
Duero, rio (España y Portugal)
Materias Unesco
3105.02 Piscicultura
ISSN
2073-4441
Revisión por pares
SI
Patrocinador
Unión Europea H2020 - (grant 727830)
Ayudas Torres Quevedo - (grants PTQ2018-010162 and PTQ2016-08494)
Universidad de Valladolid - (grant PIF-UVa 2017)
Ayudas Torres Quevedo - (grants PTQ2018-010162 and PTQ2016-08494)
Universidad de Valladolid - (grant PIF-UVa 2017)
Version del Editor
Propietario de los Derechos
© 2021 The authors
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
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