RT info:eu-repo/semantics/article
T1 Fishways as downstream routes in small hydropower plants: Experiences with a potamodromous cyprinid
A1 Sanz Ronda, Francisco Javier
A1 Fuentes Pérez, Juan Francisco
A1 García Vega, Ana
A1 Bravo Córdoba, Francisco Javier
K1 Fish
K1 Peces - Migración
K1 Marine & Freshwater Sciences
K1 Freshwater & Marine Ecology
K1 Ecología de los cursos de agua
K1 Hydraulics
K1 Peces de agua dulce
K1 Barbos
K1 Duero, rio (España y Portugal)
K1 3105.02 Piscicultura
AB 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.
PB MDPI
SN 2073-4441
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/59649
UL https://uvadoc.uva.es/handle/10324/59649
LA eng
NO Water, 2021, Vol. 13, Nº. 8, 1041
NO Producción Científica
DS UVaDOC
RD 23-may-2024