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Title: | Effects of different dietary selenium sources on growth performance, liver and muscle composition, antioxidant status, stress response and expression of related genes in gilthead seabream (Sparus aurata) | Authors: | Mechlaoui, Marwa Dominguez, David Robaina, Lidia Geraert, Pierre-Andre Kaushik, Sadasivam Mohamed Ibrahim Azam, Reda Saleh Briens, Mickael Montero, Daniel Izquierdo, Marisol |
UNESCO Clasification: | 310502 Piscicultura | Keywords: | Trout Oncorhynchus-Mykiss Hybrid Striped Bass Glutathione-Peroxidase Oxidative Stress 2-Hydroxy-4-Methylselenobutanoic Acid, et al |
Issue Date: | 2019 | Journal: | Aquaculture | Abstract: | The present study aimed to determine the effects of dietary inclusion of selenium (Se) in the form of either inorganic Se (sodium selenite, NaSe) or organic Se (hydroxy-selenomethionine, OH-SeMet) on gilthead seabream (Sparus aurata). Triplicate groups of 150 fish each (6.2 +/- 0.04 g initial body weight) were distributed in 15 tanks and fed one of five experimental diets for 63 days. A control diet (C) without Se supplementation (0.8 mg Se/kg diet), was formulated and served as a basal diet for the other 4 experimental feeds, supplemented with either 0.2 or 0.5 mg Se/kg supplied in the form of NaSe or OH-SeMet. Fish growth performance, biochemical composition of liver and muscle and Se content, malondialdehyde (MDA) concentration in muscle and hepatopancreas, hepatocyte morphology and lysozyme activity in the serum were studied. Furthermore, expression of related hepatic genes, such as manganese superoxide dismutase (Mn-sod), catalase (cat), heat shock protein 70 (hsp70), and glutathione peroxidase (gpx) was also analyzed. After the trial, fish were exposed to an acute and chronic confinement stress. Blood samples for cortisol analysis were taken at 0 and 2 h after the acute stress and after 7 days of chronic stress. | URI: | http://hdl.handle.net/10553/59964 | ISSN: | 0044-8486 | DOI: | 10.1016/j.aquaculture.2019.04.037 | Source: | Aquaculture [ISSN 0044-8486], v. 507, p. 251-259 |
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