Abstract


THE ROLE OF PATCH CONNECTIVITY IN RIVER NETWORKS FOR THE DYNAMICS OF SALMO TRUTTA POPULATIONS

Salmo trutta has a great cultural, economic and environmental importance in many parts of the world. The populations dynamics of this specie may be influenced by several factors and is necessary a detailed knowledge about which are the principal reasons that may cause an increase or decline of the populations. The purpose of this study is analyze the spatial patterns of this specie for each age class in a entire river network (Cares-Deva basin) of the North of Spain and show how patch connectivity seems to be relevant in their dynamics. Our analysis are based in field data samples of fish and a detailed definition and characterization of the habitat patch. To delimit the patches we used criteria based on natural and artificial barriers, confluence of tributaries and significant changes in the physical habitat which limit their spatial distribution. Subsequently, a population dynamics model was applied for different scenarios. This allow us to understand which is the role of the connectivity for the dynamics of the specie in the catchment which is essential for their conservation and management.

Authors

González, A. M., Environmental Hydraulics Institute “IH Cantabria”, University of Cantabria, Spain, gferrerasam@unican.es

Rodríguez-Castillo, T., Institute “IH Cantabria”, University of Cantabria, Spain

Estévez, E., Institute “IH Cantabria”, University of Cantabria, Spain

Álvarez-Cabria, M., Institute “IH Cantabria”, University of Cantabria, Spain

Peñas, F. J., Institute “IH Cantabria”, University of Cantabria, Spain

Silió-Calzada, A., Institute “IH Cantabria”, University of Cantabria, Spain

Álvarez-Martínez, J. M., Institute “IH Cantabria”, University of Cantabria, Spain

Lezcano, M., Institute “IH Cantabria”, University of Cantabria, Spain

Barquín, J., Institute “IH Cantabria”, University of Cantabria, Spain

Details

Oral presentation

Session #:007
Date: 2/25/2015
Time: 17:15
Location: Albeniz (Floor -2)

Presentation is given by student: Yes