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Lipids and fatty acid composition in the crustacean model organism Artemia sp. as influenced by poly‐β‐hydroxybutyrate (PHB) supplementation
Ludevese-Pascual, G.; Laranja, J.L.; Ahmed, F.; Amar, E.; De Troch, M.; Bossier, P.; De Schryver, P. (2020). Lipids and fatty acid composition in the crustacean model organism Artemia sp. as influenced by poly‐β‐hydroxybutyrate (PHB) supplementation. Aquacult. Nutr. 26(6): 2235-2244. https://dx.doi.org/10.1111/anu.13160
In: Aquaculture Nutrition. Blackwell Science: Oxford. ISSN 1353-5773; e-ISSN 1365-2095
Peer reviewed article  
Available in  Authors 
    Vlaams Instituut voor de Zee: Non-open access 355551 [ request ]
Keywords
    Acids > Organic compounds > Organic acids > Fatty acids
    Chemical compounds > Organic compounds > Lipids
    Artemia Leach, 1819 [WoRMS]; Comamonas testosteroni
Author keywords
    lipid emulsion, poly-ß-hydroxybutyrate (PHB)
Authors  Top 
  • Ludevese-Pascual, G.
  • Laranja, J.L.
  • Ahmed, F.
  • Amar, E.
  • De Troch, M.
  • Bossier, P.
  • De Schryver, P.
Abstract
    The effects of dietary poly‐β‐hydroxybutyrate (PHB) on the lipid and fatty acids (FA) in crustaceans were investigated using Artemia as model species. Supplying PHB either in crystalline or amorphous form significantly increased the whole‐body lipid contents of starved Artemia. Co‐supplying dietary PHB with bacterial PHB degrader Comamonas testosteroni at 106 cells ml−1 for 24 hr also significantly increased this parameter. These findings have important implications on the lipid‐saving effects of PHB in crustacean tissues. Dietary PHB, however, did not contribute to the increase in docosahexaenoic acid (DHA) of the naturally DHA‐deprived Artemia. Alternative strategy of co‐supplying dietary PHB with highly unsaturated fatty acid (HUFA)‐rich emulsion for 24 hr effectively improved the nutritional contents of Artemia and at the same time assured efficient delivery of PHB to the larval predator. According to a 13C stable isotope tracer study, the significantly higher δ13C levels measured in Artemia 2 hr postfeeding with 13C‐labelled R. eutropha DSM545 indicate that PHB offered in natural matrix is rapidly assimilated. Overall, this study demonstrated the lipid‐saving effects of PHB in Artemia. PHB assimilation following gastrointestinal degradation could attribute to its reported beneficial effects in various aquatic farmed species.
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