Growth performance and metabolic utilization of diets including starch, dextrin, maltose or glucose as carbohydrate source by gilthead sea bream (Sparus aurata) juveniles

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Enes, P (Autor) FCUP; Peres, H (Autor) FCUP; Couto, A (Autor) Outra; Oliva Teles, A (Autor) FCUP

Revista

Título: Fish Physiology and Biochemistry

Vol. 36

Páginas: 903-910

ISSN: 0920-1742

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 43 Citações

Scopus - 52 Citações

Classificação Científica

FOS: Ciências agrárias > Agricultura, silvicultura e pescas

Outras Informações

ID Authenticus: P-003-0GD

DOI: 10.1007/s10695-009-9366-y

Abstract (EN): The effect of dietary carbohydrate complexity on growth, feed utilization and activity of selected key liver enzymes of intermediary metabolism were studied in pithead sea bream juveniles Four isonitrogenous (50% crude protein) and isolipidic (16% crude lipids) diets were formulated to contain 20% of pregelatinized maize starch, dextrin, maltose or glucose Triplicate groups of fish (117 g initial weight) were fed each diet to near satiation during 6 weeks No effect of dietary carbohydrate on growth was noticed Feed efficiency was lower in fish fed the glucose diet than the maltose and dextrin diets The lowest protein efficiency ratio was observed in fish fed the glucose diet Six hours after feeding, glycemia was higher in fish fed the glucose diet than the maltose and starch diets Liver glycogen content was unaffected by dietary carbohydrate complexity Hepatic glucokinase (GK) activity was higher in fish fed the glucose and the maltose diets, while higher pyruvate kinase (PK) activity was recorded in fish fed the glucose diet than in fish fed the starch diet Fructose-1,6-bisphosphatase (FBPase) and glucose-6-phosphate dehydrogenase (G6PD) activities were higher in fish fed the starch diet compared to dextrin and glucose diets Data suggest that dietary glucose and maltose are more effective than complex carbohydrates in enhancing liver glycolytic activity Dietary glucose also seems to be more effective than starch in depressing liver gluconeogenic and lipogenic activities Overall, dietary maltose, dextrin or starch was better utilized than glucose as energy source by pithead sea bream juveniles

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8