Muscle fiber type and metabolic profiles of four muscles from the African black ostrich

Kohn, Tertius Abraham; Anley, Megan J.; Magwaza, S'thandiwe N.; Adamson, Luqmaan; Hoffman, Louw C.; Brand, T.S.

doi:10.1016/j.meatsci.2023.109156

Cited by 5 publications

(1 citation statement)

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“…The ostrich is a flightless bird for which we therefore collected the gastrocnemius instead of the pectoralis, as was the case in all other flying and swimming species. Indeed, in the ostrich, the gastrocnemius is a primary locomotion muscle, i.e., running, and exhibits a relative proportional distribution muscle fibers type with a slight predominance of FG fibers (Kohn et al, 2023;Velotto and Crasto, 2004).…”

Section: Mitochondrial Isolationmentioning

confidence: 99%

The allometry of mitochondrial efficiency is tissue dependent: a comparison between skeletal and cardiac muscles of birds

Barbe,

Watson,

Roussel

et al. 2023

Journal of Experimental Biology

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Body mass is known to be a fundamental driver of many biological traits, including metabolism. However, the effect of body mass on mitochondrial energy transduction is still poorly understood and has mainly been described in mammals. Using 13 species of birds ranging from 15 g (finches) to 160 kg (ostrich), we report here that the mitochondrial production of ATP, and corresponding oxygen consumption are negatively dependent on body mass in skeletal muscles but not in the heart. Results also showed that mitochondrial efficiency was positively correlated to body mass at sub-maximal phosphorylating states in the skeletal muscle, but not in the heart. This difference between muscle tissues is potentially linked to the difference in energetic demand expandability and the heavy involvement of skeletal muscle in thermoregulation.

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Section: Mitochondrial Isolationmentioning

confidence: 99%