Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Large Scale dynamics of Brown trout populations across Navarra Rivers (North Spain). International Symposium: Advances in Stream Salmonid Population Ecology. Museo nacional de Ciencias Naturales, CSIC. Luarca, Asturias.
Year:2010
Research Areas
  • Applied zoology
Information
Abstract
Most studies on the population dynamics of stream-living salmonids have attempted to elucidate the causes of variation in demographic traits or population abundance by analyzing population time series vis-á-vis environmental data. In order to express the results on a scale compatible with fishery management strategies, most studies have been done at the scale of a stream reach, a stream or a river basin with few studies focused on the population dynamics at larger geographic scales. Our goal is to determine the extent to which the effects of both, exogenous and endogenous factors actually describe the variations in abundance of brown trout populations inhabiting separated river basins across a large and environmentally heterogeneous territory. We tested whether the trout abundance across a large territory involving distinct populations could be described by determining the extent to which exogenous and endogenous drivers underlie the per capita population growth rate estimated from long-term time series in a way similar to that previously assessed at smaller geographical scales. We have developed a simple multivariate linear model that synthetically combines an index of large-scale climate variation with mean population abundance. This model has been built on the basis of a data set encompassing 18-year quantifications of abundance at 68 sampling stations. The results of our simulation model predict mean trout abundance with less than 10% error.
International
Si
Congress
International Symposium: Advances in Stream Salmonid Population Ecology.
960
Place
Luarca, Asturias, España.
Reviewers
Si
ISBN/ISSN
Start Date
17/05/2010
End Date
21/05/2010
From page
0
To page
0
Participants
  • Autor: Carlos Alonso Gonzalez (UPM)
  • Autor: Javier Gortázar Rubial (UPM)
  • Autor: Diego M Garcia de Jalon Lastra (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Hidrobiología
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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