RT Journal Article
T1 Identification and conservation of remnant genetic resources of brown trout in relict populations from Western Mediterranean streams
A1 Vera Rodríguez, Manuel
A1 García Marín, José Luis
A1 Martínez Portela, Paulino
A1 Araguas, Rosa M.
A1 Bouza Fernández, María Carmen
K1 Mediterranean brown trout
K1 Environmental change
K1 Introgression
K1 Genetic variability
K1 Stocking impact
K1 Relict populations
AB Brown trout is a cold-adapted freshwater species with restricted distribution to headwater streams in rivers of the South European peninsulas, where populations are highly vulnerable because Mediterranean regions are highly sensitive to the global climatic warming. Moreover, these populations are endangered due to the introgressive hybridization with cultured stocks. Individuals from six remnant populations in Western Mediterranean rivers were sequenced for the complete mitochondrial DNA control region and genotyped for 11 nuclear markers. Three different brown trout lineages were present in the studied region. Significant genetic divergence was observed among locations and a strong effect of genetic drift was suggested. An important stocking impact (close to 25%) was detected in the zone. Significant correlations between mitochondrial-based rates of hatchery introgression and water flow variation suggested a higher impact of stocked females in unstable habitats. In spite of hatchery introgression, all populations remained highly differentiated, suggesting that native genetic resources are still abundant. However, climatic predictions indicated that suitable habitats for the species in these rivers will be reduced and hence trout populations are highly endangered and vulnerable. Thus, management policies should take into account these predictions to design upstream refuge areas to protect remnant native trout in the region
PB Springer
SN 0018-8158
YR 2013
FD 2013
LK http://hdl.handle.net/10347/26170
UL http://hdl.handle.net/10347/26170
LA eng
NO Vera, M., Garcia-Marin, J.L., Martinez, P. et al. Identification and conservation of remnant genetic resources of brown trout in relict populations from Western Mediterranean streams. Hydrobiologia 707, 29–45 (2013). https://doi.org/10.1007/s10750-012-1402-8
NO This is a post-peer-review, pre-copyedit version of an article published in Hydrobiologia. The final authenticated version is available online at: https://doi.org/10.1007/s10750-012-1402-8
NO This study has been supported by the Generalitat Valenciana Autonomous Government (Spain) project (2008/CI446)
DS Minerva
RD 28 abr 2026