Muscle bioenergetics of two emblematic Mediterranean fish species: Sardina pilchardus and Sparus aurata - Université Claude Bernard Lyon 1 Accéder directement au contenu
Article Dans Une Revue Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology Année : 2019

Muscle bioenergetics of two emblematic Mediterranean fish species: Sardina pilchardus and Sparus aurata

Résumé

We investigated links between swimming behavior and muscle bioenergetics in two emblematic Mediterranean fish species that have very different ecologies and activity levels. European sardines Sardina pilchardus are pe- lagic, they swim aerobically, school constantly and have high muscle fat content. Gilthead seabream Sparus aurata are bentho-pelagic, they show discontinuous spontaneous swimming patterns and store less fat in their muscle. Estimating the proportion of red and white muscle phenotypes, sardine exhibited a larger proportion of red muscle (~10% of the body mass) compared to gilthead seabream (~5% of the body mass). We firstly studied red and white muscle fiber bioenergetics, using high-resolution respirometers, showing a 4-fold higher oxidation capacity for red compared to white muscle. Secondly, we aimed to compare the red muscle ability to oxidize either lipids or carbohydrates. Sardine red muscle had a 3-fold higher oxidative capacity than gilthead seabream and a greater capacity to oxidize lipids. This study provides novel insights into physiological mechanisms un- derlying the different lifestyles of these highly-prized species.
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hal-02165039 , version 1 (25-10-2021)

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Paternité - Pas d'utilisation commerciale

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Loïc Teulier, Thoral Elisa, Quentin Queiros, David J Mckenzie, Damien Roussel, et al.. Muscle bioenergetics of two emblematic Mediterranean fish species: Sardina pilchardus and Sparus aurata. Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology, 2019, 235, pp.174-179. ⟨10.1016/j.cbpa.2019.06.008⟩. ⟨hal-02165039⟩
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