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Memorias de investigación
Ponencias en congresos:
Combined effects of intensity and timing of floods on the trout recruitment temporal trend in Navarra (central Bay of Biscay)
Áreas de investigación
  • Ecología animal,
  • Ecología acuática
Climate and physiography in the western Pyrenees and the bay of Biscay allow the existence of abundant populations of brown trout (Salmo trutta). However, a slight, yet constant, decreasing trend in age class (both fry and adults) densities has been observed during the last few decades. The patterns of age-class density variation along the period of systematic population monitoring (1994-present) are geographically structured; thus suggesting that the observed demographic trends might be influenced by climate related trends. In fact, climate change has been altering the patterns of flow regimes, including changes in the intensity and timing of winter peak flows (Blöschl et al. 2017). Due to a strong cohort effect, interannual recruitment variation signal is transmitted along the subsequent age groups of the cohort. Therefore, recruitment success is the main endogenous driver of population density temporal variation in these trout populations. Since recruitment dynamics in this region are known to be mainly driven by hydrological events during the incubation, hatching and emerging periods, we hypothesized that hydrological trends may be, at least partially, causing the observed negative trends in recruitment.
Nombre congreso
IFM 9 th Specialist Conference Fish Flows and Climate Resilience
Tipo de participación
Lugar del congreso
York, RU
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Título de las actas
Esta actividad pertenece a memorias de investigación
  • Autor: Javier Gortázar Rubial (UPM)
  • Autor: Carlos Alonso Gonzalez (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Hidrobiología
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