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Panmixia in European eel revisited: no genetic difference between maturing adults from southern and northern Europe
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution.
2009 (English)In: Heredity, ISSN 0018-067X, E-ISSN 1365-2540, Vol. 103, no 1, 82-89 p.Article in journal (Refereed) Published
Abstract [en]

Previous studies of genetic structure in the European eel have resulted in seemingly conflicting results, ranging from no detectable heterogeneity to small but statistically significant differences and isolation by distance patterns among eels sampled across the continental range. Differences with respect to sampling design and choice of molecular markers, combined with a lack of power estimates, complicate comparisons of existing results. In this study we have used six microsatellite markers and, for the first time, compared maturing silver eels of known age from southern and northern Europe (Italy and Baltic Sea). In comparison with previous studies, our data may give a better representation of potential spawning stocks because eels were sampled when having begun their migration toward the presumed spawning area in the Sargasso Sea. Despite large sample sizes (404 and 806 individuals) we could not observe any signs of genetic differentiation (average F-ST = -0.00003, P = 0.61), and a power analysis showed that the true level of heterogeneity (if existing) must be exceedingly small to have remained undetected (say, F-ST <0.0004). A tendency for slightly increased genetic differences between cohorts over time could be seen, but the amount of temporal change was minor and not statistically significant. Our findings reiterate the notion that previous reports of continental genetic differentiation in the European eel may be largely explained by uncontrolled temporal variation between juvenile glass eel samples. Heredity (2009) 103, 82-89; doi: 10.1038/hdy.2009.51; published online 6 May 2009

Place, publisher, year, edition, pages
2009. Vol. 103, no 1, 82-89 p.
Keyword [en]
Anguilla anguilla, effective population size, null alleles, silver eels, statistical power
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-128983DOI: 10.1038/hdy.2009.51ISI: 000267088700011OAI: oai:DiVA.org:uu-128983DiVA: diva2:332395
Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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