caa a22 4500 445892153 CHVBK 20180317145620.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10750-011-0708-2 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0708-2 Dispersal and demography of brown trout, Salmo trutta , inferred from population and family structure in unstable Mediterranean streams [Elektronische Daten] [Núria Sanz, Raquel Fernández-Cebrián, Frederic Casals, Rosa Araguas, José García-Marín] The spatial distribution of closely related individuals can be inferred from genetic data and provides valuable information about dispersal patterns and gene flow contributing to the population genetic structure of organisms. Here, we analyzed family distribution of brown trout Salmo trutta in the uppermost reaches of the Mediterranean Son River basin by genotyping nine microsatellite loci. Population structure suggested a model of two units heavily affected by hatchery introgression superimposed on a hydrographic pattern. We observed kin-biased spatial distribution, implying limited dispersal of related fish, probably favored by severe climate conditions in this system. However, downstream dispersal was observed for some large adult fish. Variance in family size defined small estimates of effective population sizes (Ne) in all streams. Comparison of estimates by several methods indicated that factors other than variation of family size are responsible for such low values. The population structure in the Son River basin is, then, represented by interconnected locations in which dispersion of the fish is probably conditioned by oscillations in water discharge, particularly the extremely low water flow during summer. Stream discharge variation could also be related to the flexibility of the mating system. Such characteristics make populations especially vulnerable to stocking and to any other potential effects. Springer Science+Business Media B.V., 2011 Brown trout nationallicence Dispersal patterns nationallicence Effective population size nationallicence Family structure nationallicence Population structure nationallicence Sanz Núria Laboratori d'Ictiologia Genètica, Universitat de Girona, Campus Montilivi, 17071, Girona, Spain aut Fernández-Cebrián Raquel Laboratori d'Ictiologia Genètica, Universitat de Girona, Campus Montilivi, 17071, Girona, Spain aut Casals Frederic Secció de Fauna Silvestre, Departament de Producció Animal ETSEA, Universitat de Lleida, Lerida, Spain aut Araguas Rosa Laboratori d'Ictiologia Genètica, Universitat de Girona, Campus Montilivi, 17071, Girona, Spain aut García-Marín José Laboratori d'Ictiologia Genètica, Universitat de Girona, Campus Montilivi, 17071, Girona, Spain aut Hydrobiologia Springer Netherlands 671/1(2011-08-01), 105-119 0018-8158 671:1<105 2011 671 10750 https://doi.org/10.1007/s10750-011-0708-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0708-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sanz Núria Laboratori d'Ictiologia Genètica, Universitat de Girona, Campus Montilivi, 17071, Girona, Spain aut NATIONALLICENCE 700 1- Fernández-Cebrián Raquel Laboratori d'Ictiologia Genètica, Universitat de Girona, Campus Montilivi, 17071, Girona, Spain aut NATIONALLICENCE 700 1- Casals Frederic Secció de Fauna Silvestre, Departament de Producció Animal ETSEA, Universitat de Lleida, Lerida, Spain aut NATIONALLICENCE 700 1- Araguas Rosa Laboratori d'Ictiologia Genètica, Universitat de Girona, Campus Montilivi, 17071, Girona, Spain aut NATIONALLICENCE 700 1- García-Marín José Laboratori d'Ictiologia Genètica, Universitat de Girona, Campus Montilivi, 17071, Girona, Spain aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 671/1(2011-08-01), 105-119 0018-8158 671:1<105 2011 671 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer