During its life cycle, the European eel Anguilla anguilla has tamigrate towards the Sargasso Sea in order to reproduce. This represents a very long travel of about 6000 km which must be performed only with energy stores. During this migration, the eelhas to cope with an environment very different from what is encountered in the rivers before migration, mainly for temperature and pressure conditions. These two factors are known to have specific effects on aerobic metabolism (red muscle) and more specifically the respiration located in the mitochondrial inner membrane, a target for pressure and/or temperature effects (Sebert, 2008). However, recent studies have shown that eel appears pre-adapted to its new environment (Vettier et al, 2005). The present study has been undertaken to study if it exists an optimal combination between pressure and temperature in order to optimize aerobic energy metabolism by eel males and females.
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