Hyperaccumulation of selenium in hybrid striped bass: a functional food for aquaculture?
By P. Cotter, S. Craig, E. McLean. 2008
103 citations recorded by the source corpus.
One method of increasing the value of aquacultured product is to produce fillets that are fortified with minerals that are beneficial to human health – that is enhance the functionality of an already healthy product. A good candidate mineral in this regard is selenium (Se) which is of vital importance to normal metabolism in humans. In order to evaluate the dose response and tissue accumulation of supplemental dietary Se, a study was undertaken with hybrid striped bass (HSB). Animals were fed diets supplemented with either organic (0–3.2 mg kg−1 as SelPlex®) or inorganic (0.2 and 0.4 mg kg−1 as sodium selenite) Se for 6 weeks. Because basal fishmeal-based diets contained 1.22 mg Se kg−1, doses of Se delivered equated to 1.22–4.42 mg kg−1. At trial end, greatest weight gain was observed in fish receiving 0.2 mg Se kg−1, irrespective of form (organic/inorganic). Se accumulation in HSB liver and fillet revealed a classical dose-response once a threshold level of 0.2 mg Se kg−1 was surpassed. Greatest tissue accumulation of Se was observed in fish fed the 3.2 mg Se kg−1 level (P > 0.0001). A 100 g portion of Se-enhanced HSB fillet would contain between 33 and 109 μg Se, amounting to a dietary intake of between 25 and 80 μg Se; a level that would satisfy present daily intake recommendations. Comparison of tissue Se levels indicated that the muscle provides a more conspicuous gauge of dietary Se dose-response than does liver. Dietary treatments of between 0.4 and 1.6 mg organic Se kg−1 reduced (P < 0.024) plasma glutathione peroxidase (GSH-Px) activity. No differences were observed in ceruloplasmin, lysozyme or GSH-Px activities between organic and inorganic Se when delivered at the 0.2 mg Se kg−1 level. Ceruloplasmin, lysozyme and GSH-Px levels were elevated (P ≥ 0.025) in fish fed the diet containing 0.4 mg inorganic Se kg−1.
Subfields: Health, Toxicology and Mutagenesis, Nutrition and Dietetics, Plant Science
View Paper: https://www.semanticscholar.org/paper/0e49876906524861b1eeb3a679c04c4913f4a4fc
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In Health, Toxicology and Mutagenesis
Citations in the corpus
- Effects of different levels of dietary selenium nanoparticles on growth performance, muscle composition, blood biochemical profiles and antioxidant status of common carp (Cyprinus carpio) (2015, background): “…supplemented is an important consideration (Han et al., 2011), various forms of Se supplementation have been studied in fish species including hybrid striped bass (Cotter et al., 2008), common carp (Jovanovic et al., 1997), crucian carp (Wang et al., 2007a) and common barbel (Kouba et al., 2014).”