Life history of turbot in Icelandic waters: Intra- and inter-population genetic diversity and otolith tracking of environmental temperatures

Albert K. Imsland*, Kristinn Ólafsson, Sigurlaug Skírnisdóttir, Snorri Gunnarsson, Matthías Oddgeirsson, Sara Vandamme, Sarah J. Helyar, Julie Skadal, Arild Folkvord

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The stock structure of turbot was investigated between samples from S-Norway, the Irish Sea and the Kattegat, using 12 microsatellite loci and compared to the turbot caught in Icelandic waters. Highly significant genetic differentiation was observed between samples from Kattegat and other areas. Significant genetic differentiation was also observed between the Irish Sea sample on one hand and Iceland and S-Norway on the other hand. No significant genetic differentiation was observed between Iceland and S-Norway. Otoliths of 25 turbot, age ranging from 3 to 19 years, were subjected to nearly 300 mass spectrometry determinations of stable oxygen and carbon isotopes. Oxygen isotope composition (δ18O) in the otolith samples was used to estimate ambient temperature at time of otolith accretion, and yielded estimated temperatures experienced by the turbot ranging from 3 to 15°C. Overall, the genetic analysis indicates panmixia between turbot in Icelandic and Norwegian waters. While the extensive migration of larvae between Norway and Iceland is unlikely, passive drift of turbot larva from other areas (e.g. Ireland) cannot be ruled out. 

Original languageEnglish
Pages (from-to)185-193
Number of pages9
JournalFisheries Research
Volume155
DOIs
Publication statusPublished - Jul 2014

Keywords

  • Life history
  • Local warming
  • Population genetics
  • Turbot

ASJC Scopus subject areas

  • Aquatic Science

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    Imsland, A. K., Ólafsson, K., Skírnisdóttir, S., Gunnarsson, S., Oddgeirsson, M., Vandamme, S., Helyar, S. J., Skadal, J., & Folkvord, A. (2014). Life history of turbot in Icelandic waters: Intra- and inter-population genetic diversity and otolith tracking of environmental temperatures. Fisheries Research, 155, 185-193. https://doi.org/10.1016/j.fishres.2014.03.004