RT info:eu-repo/semantics/article
T1 Pre-reproductive movements of potamodromous cyprinids in the Iberian Peninsula: when environmental variability meets semipermeable barriers
A1 García-Vega, Ana
A1 Fuentes-Pérez, Juan Francisco
A1 Bravo-Córdoba, Francisco Javier
A1 Ruiz-Legazpi, Jorge
A1 Valbuena-Castro, Jorge
A1 Sanz-Ronda, Francisco Javier
K1 Ictiología
K1 Migración de peces
K1 Ecología fluvial
K1 Gestión de cuencas hidrográficas
K1 Pasos para peces
K1 Fish migration
K1 Fishway
K1 Iberian barbel
K1 Northern straight-mouth nase
K1 Random forest
K1 2401.02 Comportamiento Animal
K1 3105.04 Protección de Los Peces
K1 3106.09 Ordenación de Cuencas Fluviales
K1 1203.07 Modelos Causales
K1 2508 Hidrología
AB This study aims to describe pre-reproductive movements of Luciobarbus bocagei and Pseudochondrostoma duriense in a regulated canyon-stretch of the Tormes River (Spain), with high environmental variability, semipermeable barriers, and fishway retrofitting actions. The main objectives were to identify peak migration dates and environmental drivers, test ensemble-learning techniques to model fish migration and propose adaptive management measures. To achieve this, fish movements were 5-year monitored in a stepped fishway and Survival Analysis and Random Forest techniques were used for data analysis and modelling. Results showed that migration occurred in May–July, a wider period than the one previously reported in the literature. Movements were triggered by the increase in water temperature and photoperiod, and were strongly affected by the hydraulic river scenario (water levels and discharge) at the semipermeable barriers. Random Forest was able to include the effect of each barrier and predict accurately timing and number of migrants, classifying and ranking the importance of variables. Moreover, developed models allowed to assess fishway retrofitting actions and to predict positive effects in fish number under new, scheduled and variable environmental flow scenarios. Long-term monitoring together with ensemble-learning methods can allow the definition of cost-effective adaptive management strategies to ensure endemic fish conservation.
PB Springer
SN 0018-8158
YR 2022
FD 2022-03
LK https://uvadoc.uva.es/handle/10324/81642
UL https://uvadoc.uva.es/handle/10324/81642
LA spa
NO Hydrobiologia, March 2022, vol. 846, p. 1317–1338
NO Producción Científica
DS UVaDOC
RD 16-ene-2026