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Dietary carbohydrate and metabolism in the spiny lobster Panulirus argus

AuthorsRodríguez-Viera, Leandro; Perera, Erick; Martos-Sitcha, Juan Antonio ; García-Galano, Tsai; Mancera, Juan Miguel
Issue DateNov-2015
CitationX Congreso de Ciencias del Mar (2015)
AbstractSeveral studies have evaluated different metabolic, mostly glycolytic, enzymes in economically relevant crustacean such as penaeid shrimps in relation to carbohydrate level in diet, starvation, molt cycle, and osmotic stress. There is no previous reports on the activity of metabolic enzymes in spiny lobster in relation to feeding, neither on the interaction of dietary carbohydrates with other nutrients at the level of intermediary metabolism. The aim of this study was to evaluate the effects of the extent and the time-course of carbohydrate digestion on the metabolism of P. argus. We have used complementary methodologies such as post-feeding flux of nutrients and metabolites, and determination of activity of key metabolic enzymes. The multivariate analysis in this study supports that lobsters respond to feeding by changing the level of metabolites and activity of some key metabolic enzymes according to the diet ingested. The ingestion of different carbohydrates, however, impacts lobster metabolic enzymes more than circulating or tissue metabolites. While most of the metabolite variables predictive of carbohydrate source ingestion were related with carbohydrate digestion itself and carbohydrate metabolism, the discriminant analysis revealed that the type of carbohydrate ingested has a profound effect on overall metabolism, being the predictable variables involved in all metabolic route analyzed in this study, from carbohydrate processing routes to amino acid and fatty acid metabolism. Results presented may assist in selecting physiologically appropriated carbohydrate sources for P. argus, and constitute baseline data for further optimization of formulated feeds in this species.
DescriptionTrabajo presentado en el X Congreso de Ciencias del Mar (MARCUBA 2015, Integración de las Ciencias para la Gestión de los Recursos Marinos), celebrado en La Habana del 16 al 20 de noviembre de 2015.
Appears in Collections:(ICMAN) Comunicaciones congresos
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