RT info:eu-repo/semantics/article
T1 Upstream migration of anadromous and potamodromous brown trout: patterns and triggers in a 25-year overview
A1 García Vega, Ana
A1 Fuentes Pérez, Juan Francisco
A1 Leunda Urretabizkaia, Pedro M.
A1 Ardaiz Ganuza, José
A1 Sanz Ronda, Francisco Javier
K1 Salmo trutta
K1 Sea trout
K1 Riverine trout
K1 Fish migration
K1 31 Ciencias Agrarias
AB River fragmentation and alterations inflow and thermal regimes are the main stressorsaffecting migrating fish, which could be aggravated byclimate change and increasing water demand. Toassess these impacts and define mitigation measures, itis vital to understand fish movement patterns and theenvironmental variables affecting them. This studypresents a long-term (1995–2019) analysis ofupstream migration patterns of anadromous andpotamodromous brown trout in the lower RiverBidasoa (Spain). For this, captures in a monitoringstation were analyzed using Survival Analysis andRandom Forest techniques. Results showed that mostupstream movements of potamodromous troutoccurred in October–December, whereas in June–Julyfor anadromous trout, although with differencesregarding sex and size. Both, fish numbers and datesvaried over time and were related to the environmentalconditions, with different influence on each ecotype.The information provided from comparative studiescan be used as a basis to develop adaptive managementstrategies to ensure freshwater species conservation.Moreover, studies in the southern distribution rangecan be crucial under climate warming scenarios, wherespecies are expected to shift coldwards.
PB Springer
SN 0018-8158
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/50378
UL https://uvadoc.uva.es/handle/10324/50378
LA eng
NO Hydrobiologia, 2021, vol. 849, p. 197-213
NO Producción Científica
DS UVaDOC
RD 24-nov-2024