uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Population structure of flounder (Platichthys flesus) in the Baltic Sea: differences among demersal and pelagic spawners
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution.
2008 (English)In: Heredity, ISSN 0018-067X, Vol. 101, no 1, 27-38 p.Article in journal (Refereed) Published
Abstract [en]

We found significant population structure and isolation by distance among samples of flounder (Platichthys flesus) in the Baltic, Kattegat and Skagerrak seas using microsatellite genetic markers. This pattern was almost entirely due to a difference between flounder that have demersal spawning in the northern Baltic, as compared to pelagic spawners in the southern Baltic and on the west coast of Sweden. Among demersal spawners we found neither genetic differentiation nor any isolation by distance among sampling sites. We speculate that demersal flounder are descendants of a population that colonized the Baltic previous to pelagic spawners. The demersal flounder may thus have had longer time to adapt to the low salinity in the Baltic, and accordingly display egg characteristics that make it possible to reproduce at the low salinity levels in the northern Baltic. Among pelagic spawners significant isolation by distance was detected. Pelagic spawners have previously been shown to display clinal variation in egg size, which allows them to float also at the moderate salinity levels up to the region north of the island Bornholm. Management units for harvesting should ideally be based on true biological populations, and for the commercially important flounder up to 15 different management stocks in the Baltic have been suggested. We could not find a population genetic foundation for such a high number of management units, and our data suggest three management units: the northern Baltic (demersal populations), southern Baltic with the Oresund straits and the most northwestern sampling sites (Skagerrak, Kattegat and North Sea).

Place, publisher, year, edition, pages
2008. Vol. 101, no 1, 27-38 p.
Keyword [en]
population structure, Platichthys flesus, Baltic Sea, local adaptation, reproduction, microsatellites
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-110044DOI: 10.1038/hdy.2008.22ISI: 000256832800005OAI: oai:DiVA.org:uu-110044DiVA: diva2:275067
Available from: 2009-11-03 Created: 2009-11-02 Last updated: 2010-01-29Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full texthttp://www.nature.com/hdy/journal/v101/n1/abs/hdy200822a.html
By organisation
Department of Ecology and Evolution
In the same journal
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 194 hits
ReferencesLink to record
Permanent link

Direct link