Large Scale dynamics of Brown trout populations across Navarra Rivers (North Spain)

Alonso González, Carlos and García de Jalón Lastra, Diego and Alvarez, J. and Gortázar Rubial, Javier (2010). Large Scale dynamics of Brown trout populations across Navarra Rivers (North Spain). In: "International Symposium: Advances in Stream Salmonid Population Ecology", 17/05/2010 - 21/05/2010, Luarca, Asturias, España..

Description

Title: Large Scale dynamics of Brown trout populations across Navarra Rivers (North Spain)
Author/s:
  • Alonso González, Carlos
  • García de Jalón Lastra, Diego
  • Alvarez, J.
  • Gortázar Rubial, Javier
Item Type: Presentation at Congress or Conference (Article)
Event Title: International Symposium: Advances in Stream Salmonid Population Ecology
Event Dates: 17/05/2010 - 21/05/2010
Event Location: Luarca, Asturias, España.
Title of Book: Proceedings of the International Symposium: Advances in Stream Salmonid Population Ecology
Date: 2010
Subjects:
Faculty: E.T.S.I. Montes (UPM)
Department: Ingeniería Forestal [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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.

More information

Item ID: 7575
DC Identifier: http://oa.upm.es/7575/
OAI Identifier: oai:oa.upm.es:7575
Deposited by: Memoria Investigacion
Deposited on: 21 Jun 2011 08:03
Last Modified: 20 Apr 2016 16:41
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