RT info:eu-repo/semantics/article
T1 Fishway attraction efficiency during upstream and down-stream migration: field tests in a small hydropower plant with run-of-the-river configuration
A1 Bravo Córdoba, Francisco Javier
A1 Torrens, Julen
A1 Fuentes Pérez, Juan Francisco
A1 García Vega, Ana
A1 Sanz Ronda, Francisco Javier
K1 Freshwater fishes
K1 Peces de Agua dulce - España
K1 Freshwater fishes - Migration
K1 Fishes - Migration
K1 Peces - Migración
K1 Fish passes
K1 Freshwater fishes - Ecology
K1 Barbos
K1 Aquatic ecology
K1 Ecología del agua dulce
K1 Marine & Freshwater Sciences
K1 3105 Peces y Fauna Silvestre
K1 5102.08 Pesca
AB Understanding fishway attraction is one of the main open challenges in fishways research, and unraveling the mechanisms and relationships that trigger it is crucial to improve the performance of fishways. Furthermore, attraction is usually understood in terms of upstream migration; however, taking into account the possible bidirectional use of fishways, it is equally important to study this phenomenon during downstream migration, although this is usually considered negligible. Therefore, this study aims to advance our understanding of fishway attraction efficiency by considering both upstream and downstream movements in a key small hydropower plant scheme in the Iberian Peninsula. To achieve this, one of the most common Iberian fish species, the Iberian barbel (Luciobarbus bocagei, Steindachner), was monitored via telemetry in a stepped fishway. The studied fishway, considering the specialized literature, would be classified as poor in attraction, i.e., difficult to find due to its low competing discharge and the long distance between the main river flow and both fishway entrances. Fish were PIT tagged and released in different upstream and downstream locations and on different dates. The results showed that a significant proportion of the tagged barbels was able to successfully locate the fishway from both sides, in spite of the mentioned localization drawbacks, with inter-annual variability and with repeated events throughout the years. This suggests that even a fishway with a theoretical poor attraction can still be localized by fish, allowing their use as a two-way migration route, at least with species and HPP schemes such as those already studied.
PB MDPI
SN 2673-9976
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/61830
UL https://uvadoc.uva.es/handle/10324/61830
LA eng
NO Biology and Life Sciences Forum, 2022, Vol. 13, Nº. 1, 40
NO Producción Científica
DS UVaDOC
RD 24-nov-2024