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Dietary tools to modulate glycogen storage in gilthead seabream muscle: glycerol supplementation
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Orientador(es)
Resumo(s)
The quality and shelf life of fish meat products depend on the skeletal muscle’s energetic state at slaughter, as meat decomposition processes can be exacerbated by energy depletion. In this study, we tested dietary glycerol as a way of
replenishing muscle glycogen reserves of farmed gilthead seabream. Two diets were tested in duplicate (n = 42/tank). Results
show 5% inclusion of crude glycerol in gilthead seabream diets induces increased muscle glycogen, ATP levels and firmness, with no deleterious effects in terms of growth, proximate composition, fatty acid profile, oxidative state, and organoleptic properties (aroma and color). Proteomic analysis showed a low impact of glycerol-supplementation on muscle metabolism, with most changes probably reflecting increased stress coping capacity in glycerol-fed fish. This suggests inclusion of crude glycerol in
gilthead seabream diets (particularly in the finishing phase) seems like a viable strategy to increase glycogen deposition in muscle without negatively impacting fish welfare and quality.
Descrição
Palavras-chave
Crude glycerol Muscle glycogen Gilthead seabream Aquaculture Flesh quality Fish proteomics
Contexto Educativo
Citação
Silva, Tomé S.; Matos, Elisabete; Cordeiro, Odete D.; Colen, Rita; Wulff, Tune; Sampaio, Eduardo; Sousa, Vera; Valente, Luisa M. P.; Gonçalves, Amparo; Silva, Joana M. G.; Bandarra, Narcisa; Nunes, Maria Leonor; Dinis, Maria Teresa; Dias, Jorge; Jessen, Flemming; Rodrigues, Pedro M. Dietary Tools To Modulate Glycogen Storage in Gilthead Seabream Muscle: Glycerol Supplementation, Journal of Agricultural and Food Chemistry, 60, 42, 10613-10624, 2012.
Editora
American Chemical Society