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Reduced genetic diversity and low effective size in peripheral northern European catfish Silurus glanis populations

Palm, Stefan ; Vinterstare, Jerker LU ; Nathanson, Jan Eric ; Triantafyllidis, Alexandros and Petersson, Erik (2019) In Journal of Fish Biology 95(6). p.1407-1421
Abstract

Using 10 polymorphic microsatellites and 1251 individual samples (some dating back to the early 1980s), genetic structure and effective population size in all native and introduced Swedish populations of the European wels catfish or Silurus glanis were studied. Levels of genetic variability and phylogeographic relationships were compared with data from a previous study of populations in other parts of Europe. The genetically distinct Swedish populations displayed comparably low levels of genetic variability and according to one-sample estimates based on linkage disequilibrium and sib ship-reconstruction, current local effective population sizes were lower than minimum levels recommended for short-term genetic conservation. In line with... (More)

Using 10 polymorphic microsatellites and 1251 individual samples (some dating back to the early 1980s), genetic structure and effective population size in all native and introduced Swedish populations of the European wels catfish or Silurus glanis were studied. Levels of genetic variability and phylogeographic relationships were compared with data from a previous study of populations in other parts of Europe. The genetically distinct Swedish populations displayed comparably low levels of genetic variability and according to one-sample estimates based on linkage disequilibrium and sib ship-reconstruction, current local effective population sizes were lower than minimum levels recommended for short-term genetic conservation. In line with a previous suggestion of postglacial colonisation from a single refugium, all Swedish populations were assembled on a common branch in a star-shaped dendrogram together with other European populations. Two distinct subpopulations were detected in upper and lower habitats of River Emån, indicating that even minor dispersal barriers may restrict gene flow for wels in running waters. Genetic assignment of specimens encountered in the brackish Baltic Sea and in lakes where the species does not occur naturally indicated presence of long-distance sea dispersal and confirmed unauthorised translocations, respectively.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
conservation, effective population size, endangered, microsatellites, population genetics, Silurus glanis
in
Journal of Fish Biology
volume
95
issue
6
pages
15 pages
publisher
Wiley-Blackwell
external identifiers
  • pmid:31597197
  • scopus:85074942511
ISSN
0022-1112
DOI
10.1111/jfb.14152
language
English
LU publication?
yes
id
45434d73-99dd-4e19-8e6f-3fde7230a6bb
date added to LUP
2019-12-09 14:14:14
date last changed
2020-10-20 03:50:27
@article{45434d73-99dd-4e19-8e6f-3fde7230a6bb,
  abstract     = {<p>Using 10 polymorphic microsatellites and 1251 individual samples (some dating back to the early 1980s), genetic structure and effective population size in all native and introduced Swedish populations of the European wels catfish or Silurus glanis were studied. Levels of genetic variability and phylogeographic relationships were compared with data from a previous study of populations in other parts of Europe. The genetically distinct Swedish populations displayed comparably low levels of genetic variability and according to one-sample estimates based on linkage disequilibrium and sib ship-reconstruction, current local effective population sizes were lower than minimum levels recommended for short-term genetic conservation. In line with a previous suggestion of postglacial colonisation from a single refugium, all Swedish populations were assembled on a common branch in a star-shaped dendrogram together with other European populations. Two distinct subpopulations were detected in upper and lower habitats of River Emån, indicating that even minor dispersal barriers may restrict gene flow for wels in running waters. Genetic assignment of specimens encountered in the brackish Baltic Sea and in lakes where the species does not occur naturally indicated presence of long-distance sea dispersal and confirmed unauthorised translocations, respectively.</p>},
  author       = {Palm, Stefan and Vinterstare, Jerker and Nathanson, Jan Eric and Triantafyllidis, Alexandros and Petersson, Erik},
  issn         = {0022-1112},
  language     = {eng},
  month        = {12},
  number       = {6},
  pages        = {1407--1421},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Fish Biology},
  title        = {Reduced genetic diversity and low effective size in peripheral northern European catfish Silurus glanis populations},
  url          = {http://dx.doi.org/10.1111/jfb.14152},
  doi          = {10.1111/jfb.14152},
  volume       = {95},
  year         = {2019},
}