Conservation Genetics

, Volume 4, Issue 3, pp 249–264

Effective population size and temporal genetic change in stream resident brown trout (Salmo trutta, L.)

  • Stefan Palm
  • Linda Laikre
  • Per Erik Jorde
  • Nils Ryman
Article

DOI: 10.1023/A:1024064913094

Cite this article as:
Palm, S., Laikre, L., Jorde, P.E. et al. Conservation Genetics (2003) 4: 249. doi:10.1023/A:1024064913094

Abstract

Temporal genetic data may be used forestimating effective population size (Ne) and for addressing the `temporal stability' of population structure, two issues of central importance for conservation and management. In this paper we assess the amount of spatio-temporal genetic variation at 17 di-allelic allozyme loci and estimate current Ne in two populations of stream resident brown trout (Salmo trutta) using data collected over 20 years. The amount ofpopulation divergence was found to bereasonably stable over the studied time period.There was significant temporal heterogeneitywithin both populations, however, and Ne was estimated as 19 and 48 for the twopopulations. Empirical estimates of theprobability of detecting statisticallysignificant allele frequency differencesbetween samples from the same populationseparated by different numbers of years wereobtained. This probability was found to befairly small when comparing samples collectedonly a few years apart, even for theseparticular populations that exhibit quiterestricted effective sizes. We discuss someimplications of the present results for browntrout population genetics and conservation, andfor the analysis of temporal genetic change inpopulations with overlapping generations ingeneral.

allozymesconservationgenetic driftheterozygositymonitoringNeoverlapping generationstemporal method

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Stefan Palm
    • 1
  • Linda Laikre
    • 1
  • Per Erik Jorde
    • 1
  • Nils Ryman
    • 1
  1. 1.Division of Population GeneticsStockholm UniversityStockholmSweden
  2. 2.Department of Coastal Zone, Flødevigen Marine Research Station, N-4817 His, Norway, and Division of Zoology, Department of Biology, University of OsloInstitute of Marine ResearchOsloNorway