Get access
Advertisement

Geographic variation in growth and food conversion efficiency of juvenile Atlantic halibut related to latitude

Authors

  • T. M. Jonassen,

    1. Department of Fisheries and Marine Biology, University of Bergen, High Technology Centre, N-5020 Bergen, Norway
    Search for more papers by this author
    • §

      These authors contributed equally to this paper.

  • A. K. Imsland,

    Corresponding author
    1. Department of Fisheries and Marine Biology, University of Bergen, High Technology Centre, N-5020 Bergen, Norway
      ¶Author to whom all correspondence should be addressed. Tel.: +47 55 58 4471; fax: +47 55 58 4450; email: albert.imsland@ifm.uib.no
    Search for more papers by this author
    • §

      These authors contributed equally to this paper.

  • R. Fitzgerald,

    1. Aquaculture Development Centre, Department of Zoology and Animal Ecology, National University of Ireland, Cork, Lee Maltings, Prospect Row, Cork, Ireland
    Search for more papers by this author
  • S. W. Bonga,

    1. Department of Animal Physiology, University of Nijmegen, 6525 ED Nijmegen, The Netherlands
    Search for more papers by this author
  • E. V. Ham,

    1. Aquaculture Development Centre, Department of Zoology and Animal Ecology, National University of Ireland, Cork, Lee Maltings, Prospect Row, Cork, Ireland
    Search for more papers by this author
  • G. Nævdal,

    1. Department of Fisheries and Marine Biology, University of Bergen, High Technology Centre, N-5020 Bergen, Norway
    Search for more papers by this author
  • M. O. Stefánsson,

    1. Aquaculture Development Centre, Department of Zoology and Animal Ecology, National University of Ireland, Cork, Lee Maltings, Prospect Row, Cork, Ireland
    Search for more papers by this author
  • S. O. Stefansson

    1. Department of Fisheries and Marine Biology, University of Bergen, High Technology Centre, N-5020 Bergen, Norway
    Search for more papers by this author

¶Author to whom all correspondence should be addressed. Tel.: +47 55 58 4471; fax: +47 55 58 4450; email: albert.imsland@ifm.uib.no

Abstract

Higher growth capacity and food conversion efficiency was observed in populations of juvenile halibut from high Hippoglossus hippoglossus compared lower latitudes. In addition, temperature adaptation shown by the lower temperature optimum for growth in the Norwegian population (mean±S.E. 12·9±0·10 C) compared with the Icelandic and Canadian populations (14·2±0·2 and 13·9±0±30 C respectively), seems to occur. Overall the data support the hypothesis of countergradient variation in growth. These results have implications firstly for selection focusing on growth performance in halibut culture; and secondly, for safe prediction of growth, since if countergradient variation in growth performance occurs one cannot assume automatically that a species will respond to the same set of physiological parameters in the same way throughout its range.

Get access to the full text of this article

Ancillary