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First published online July 25, 2005
Journal of Experimental Biology 208, 2923-2929 (2005)
Published by The Company of Biologists 2005
doi: 10.1242/jeb.01737

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Metabolic responses to cold in subterranean crustaceans

Julien Issartel^1,*, David Renault², Yann Voituron³, Alain Bouchereau⁴, Philippe Vernon² and Frédéric Hervant¹

¹ Ecologie des Hydrosystèmes Fluviaux, UMR CNRS 5023, Université Lyon 1, 69622 Villeurbanne Cedex, France
² Fonctionnement des Ecosystèmes et Biologie de la Conservation, UMR CNRS 6553, Université Rennes 1, 35042 Rennes Cedex, France
³ Physiologie des Régulations Energétiques, Cellulaires et Moléculaires, UMR CNRS 5123, Université Lyon 1, 69622 Villeurbanne Cedex, France
⁴ Osmoadaptation et Métabolismes de Stress, UMR CNRS 6026, Université Rennes 1, 35042 Rennes Cedex, France

View larger version (17K): [in a new window]   Fig. 1. Free amino acid body contents in the epigean aquatic crustacean Gammarus fossarum acclimated at 12°C (control), 3°C and –2°C. Values are means ± S.E.M. (N=6–8). Significant differences between FAA means are expressed as: *significant difference (P<0.05) between cold-acclimated and control groups; significant difference (P<0.05) between groups acclimated at 3°C and groups acclimated at –2°C.

View larger version (21K): [in a new window]   Fig. 2. Free amino acid body contents in the hypogean aquatic crustacean Niphargus rhenorhodanensis acclimated at 12°C (control), 3°C and –2°C. Values are means ± S.E.M.(N=6–8). Significant differences between FAA means are expressed as: *significant difference (P<0.05) between cold-acclimated and control groups; significant difference (P<0.05) between groups acclimated at 3°C and groups acclimated at –2°C.

View larger version (17K): [in a new window]   Fig. 3. Free amino acid body contents in the hypogean aquatic crustacean Niphargus virei acclimated at 12°C and 3°C. Values are means ± S.E.M. (N=6–8). Significant differences between FAA means are expressed as: *significant difference (P<0.05) between both groups.