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Effects of temperature on biological and biochemical indicators of the life-history strategy of bullhead Cottus gobio

Authors

  • Y. Reyjol,

    Corresponding author
    1. Groupe de Recherche en Écologie Aquatique (GREA), Département de Chimie-Biologie, Université du Québec à Trois-Rivières (UQTR), 3351 boulevard des forges, C. P. 500, Trois-Rivières, Québec, G9A 5H7, Canada
      Tel.: +1 8193765011; fax: +1 8193765084; email: yorick.reyjol@onema.fr
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  • J.-P. Léna,

    1. Laboratoire d’Écologie des Hydrosystèmes Fluviaux (L. E. H. F.), UMR CNRS 5023, Université Claude Bernard–Lyon 1, 43 boulevard du 11 Novembre 1918, 69622 Villeurbanne cedex, France
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  • F. Hervant,

    1. Laboratoire d’Écologie des Hydrosystèmes Fluviaux (L. E. H. F.), UMR CNRS 5023, Université Claude Bernard–Lyon 1, 43 boulevard du 11 Novembre 1918, 69622 Villeurbanne cedex, France
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  • D. Pont

    1. Cemagref, UR Hydrobiologie, 3275 route de Cézanne, CS 40061, 13182 Aix-en-Provence Cedex 5, France
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Errata

This article is corrected by:

  1. Errata: Erratum Volume 75, Issue 10, 2880, Article first published online: December 2009

Tel.: +1 8193765011; fax: +1 8193765084; email: yorick.reyjol@onema.fr

Abstract

The biological and biochemical effects of temperature on life-history strategy of female bullhead Cottus gobio were investigated. Fish from two populations (Bez Basin, south-east France) experiencing contrasted thermal environments (i.e. more or less stable) were reared during 4 months at three distinct temperatures (7, 9 or 12° C). Both somatic (soma fresh mass and muscle triglyceride content) and reproductive (gonad fresh mass, fecundity, mean diameter of eggs and gonad triglyceride content) indicators were examined. Mixed models indicated that an increasing temperature had significant negative effects on all life-history indicators except for soma fresh mass. Differences in life-history strategy with regard to muscle and gonad triglyceride contents, however, suggest that populations experiencing more variable thermal environments may be better adapted than others to cope with an increasing temperature. These findings may have important implications for C. gobio populations, within the context of climate warming.

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