Fluctuating asymmetry and other parameters of morphological variation of eelpout Zoarces viviparus (Zoarcidae, Teleostei) from different parts of its distributional range

Dmitry Lajus, Rainer Knust, Ole Brix

Research outputpeer-review

18 Citations (Scopus)

Abstract

Five populations of eelpout Zoarces viviparus from the White Sea, the Baltic (Gulf of Gdansk and Gulf of Finland) and the North Sea (Wadden Sea and Hafrsfjord) were studied. Using 17 bilateral meristic characters (number of holes in cranial bones) we assessed the following parameters: (i) fluctuating asymmetry (minor deviations from perfect bilateral symmetry), (ii) the factorial component of total phenotypic variance, which is a measure of within-population heterogeneity and (iii) mean values of each character. Morphological similarity among samples was only weakly correlated with geographical distances between sample locations. The magnitude of fluctuating asymmetry was higher in the samples from the White Sea and Hafrsfjord than in samples from the Wadden Sea and the Baltic Sea. The sample from the Gulf of Gdansk was characterized by the lowest fluctuating asymmetry and the highest factorial variation. We propose that among the most important factors determining fluctuating asymmetry in eelpout populations are salinity and temperature conditions and the level of genetic variation.

Original languageEnglish
Pages (from-to)247-260
Number of pages14
JournalSarsia
Volume88
Issue number4
DOIs
Publication statusPublished - 1 Oct 2003

Scopus subject areas

  • Aquatic Science
  • Ecology

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