Relación entre las características físico-químicas y ambientales del agua y el grado de introgresión genética encontrado en las poblaciones de trucha común en ríos aragoneses

Thumbnail Image

Files

2011_177.pdf (75.2 KB)

Date

2011

Authors

Mitjana Nerín, Olga María
Alabart Alvarez, José Luis
Blasco Martínez, José María
Clavero, J.L.
Josa, A.
Espinosa, E.

Journal Title

Journal ISSN

Volume Title

Publisher

Typology
conferenceObject


Abstract

We tried to correlate the level of genetic introgression in native brown trout populations with some physicochemical and environmental features. Introgresión rates were calculated according the presence (assessed by PCR-RFLP as described by Mc Meel et al. 2001) of the LDH C1*90 allele in the populations, which is fixed in central European populations used for restocking, whereas LDH C1*100 is the fixed allele in wild Mediterranean populations in the area of study. Water quality variables were obtained from Confederación Hidrográfica del Ebro data in 10-year series before sampling. Physicochemical characteristics as conductivity, pH, bicarbonates, temperature and Oxygen saturation were analyzed. Average, minimum and maximum, standard deviation and coefficient of variation were calculated for each of the above parameters. Populations were classified as wild (0% introgresión), low affected (less than 10% individuals), highly affected (10-50%) and severely affected (more than 50%). We found that highly affected populations are generally associated to higher minimum temperature and pH as well as to wide oscillations in oxygen saturation levels. Success in restocking using stocks of Atlantic domestic trout is strongly influenced by environmental features. Fortunately, wild populations show a better adaptation being able to colonise the most adverse environments. Restocking policies should be fully revised to preserve wild trout populations

Description

Keywords

Brown trout, Genetic, Introgression, Environmental features

Bibliographic citation

Mitjana, O., Alabart, J.L., Blasco, J.M., Clavero, J.L., Josa, A., Espinosa, E. “Relación entre las características físico-químicas y ambientales del agua y el grado de introgresión genética encontrado en las poblaciones de trucha común en ríos aragoneses”. En: 41 Jornadas de Estudio. XIV Jornadas sobre Producción Animal. AIDA. Zaragoza, España, 17 y 18 de mayo de 2011, pp.518-520. ISBN: 978-84-615-0062-8
Other field subjects
Trucha
Acuicultura
Producción y sanidad animal

Sponsorship

URI

http://hdl.handle.net/10532/2022

Collections

Artículos científicos, técnicos y divulgativos