Abstract
The pattern of genetic variation in 38 samples of Leuciscus pyrenaicus, from seven sites in the Tejo drainage sampled on six occasions (over 19 months), were examined electrophoretically at 12 variable loci. Significant levels of spatial subdivision were observed. In general, the genetic distances in a river, were smaller than those between rivers. The differences observed suggest that isolation-by-distance is one important factor responsible for the spatial genetic differentiation. Moreover, the genetic diversity of this species in the Tejo drainage seems to be influenced by habitat heterogeneity, i.e., upland and lowland rivers. In opposition to other cyprinid species inhabiting the same drainage, the disruption of connectivity between populations above and below dams was not confirmed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
