Effects of temperature on biological and biochemical indicators of the life-history strategy of bullhead Cottus gobio
2009
Reyjol, Yorick | Léna, Jean-Paul | Hervant, Frédéric | Pont, Didier | Groupe de Recherche en Ecologie Aquatique (GREA) ; Université du Québec à Trois-Rivières (UQTR) | Ecologie, Comportement, Conservation ; Laboratoire d'Ecologie des Hydrosystèmes Fluviaux (EHF) ; Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche en Sciences Appliquées et Technologies ; Institut de Recherche en Sciences Appliquées et Technologies-Institut de Recherche en Sciences Appliquées et Technologies-Laboratoire de Chimie-Physique et d'Electrochimie (LCPE) ; Université Joseph Ki-Zerbo de Ouagadougou = University of Ouagadougou (UJZK)-Université Joseph Ki-Zerbo de Ouagadougou = University of Ouagadougou (UJZK) | Hydrobiologie et Ecologie Souterraines ; Laboratoire d'Ecologie des Hydrosystèmes Fluviaux (EHF) ; Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) | Hydrobiologie (UR HYAX) ; Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF)
International audience
Показать больше [+] Меньше [-]Английский. 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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