|Title:||Selenium levels in early weaning diets for gilthead seabream larvae||Authors:||Saleh, Reda
Betancor, Mónica B.
Roo Filgueira, Francisco Javier
Montero Vítores, Daniel
Zamorano Serrano, María Jesús
Izquierdo López, María Soledad
|UNESCO Clasification:||251092 Acuicultura marina||Keywords:||Seabream larvae
|Issue Date:||2014||Publisher:||0044-8486||Project:||Mecanismos Fisiologicos Implicados en la Actuación de Lagunos Nutrientes Relacionados Con la Oxidación Lipidica y Sus Repercursiones en El Desarrollo Larvario de Los Peces Marinos.
Advanced Research Initiatives For Nutrition & Aquaculture
|Journal:||Aquaculture||Abstract:||The inclusion of complementary antioxidative factors, such as selenium (Se), could counteract the high oxidation risk in early weaning diets high in polyunsaturated fatty acids (PUFA). The present study investigated the effects of graded levels of Se derived yeast with krill phospholipids (KPL) on skeletal development, survival, stress resistance, oxidative status and biochemical composition of seabream larvae. Seabream larvae were completely weaned at 16 dph and fed five microdiets for 30 days with different levels of Se: 2SE, 4SE, 6SE, 8SE and 12SE (1.73, 3.91, 6.41, 8.47, 11.65 mg kg− 1 dietary dry weight, respectively). Increases in Se up to 11.65 mg kg− 1 dietary dry weight significantly improved survival rate (54%) and stress resistance, but did not affect larval growth. Seabream larvae fed diets supplemented with 12SE (11.65 mg kg− 1) showed a gradual increase in this mineral according to dietary Se levels, denoting the progressive absorption of this nutrient. The degree of larval lipid oxidation, as indicated by malondialdehyde (MDA) content and antioxidant enzyme (AOE) gene expression, was significantly lower in larvae fed 8SE and 12SE diets compared to those fed 2SE and 4SE diets. Furthermore, a reactive response as a result of Se inclusion was observed by the increase in osteocalcin, osteonectin, osteopontin, alkaline phosphatase and matrix gla protein gene expression in larval tissues, suggesting a well skeletal development. These results denoted the high efficiency of Se as an antioxidant factor and the importance of the inclusion of adequate levels (11.65 mg Se kg− 1 diet) in early weaning diets.||URI:||http://hdl.handle.net/10553/43512||ISSN:||0044-8486||DOI:||10.1016/j.aquaculture.2014.02.011||Source:||Aquaculture [ISSN 0044-8486], v. 426-427, p. 256-263|
|Appears in Collections:||Artículos|
checked on May 9, 2021
WEB OF SCIENCETM
checked on May 9, 2021
checked on May 10, 2021
Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.