The effects of poly-β-hydroxybutyrate on culture of larvae and juveniles of the Siberian sturgeon (Acipenser baerii, Brandt)

• Main Author: Hossein Najdegerami, Ebrahim
• Other Authors: Bossier, Peter, Boon, Nico
• Format: Doctoral or Postdoctoral Thesis
• Language: English
• Published: Ghent University. Faculty of Bioscience Engineering 2012
• Subjects: Biology and Life Sciences; STURGEON; ACIPENSER BAERII; POLY-β-HYDROXYBUTYRATE; Acipenser baerii; Siberian sturgeon
• Online Access: https://biblio.ugent.be/publication/2048127; http://hdl.handle.net/1854/LU-2048127; https://biblio.ugent.be/publication/2048127/file/2048141

In this study, The effects of partial diet replacement (0% as a control , 2 and 5% ) with poly-β-hydroxybutyrate (PHB) on growth performance, host response and gut microbial community of Siberian sturgeon (Acipenser baerii, Brandt) juveniles were investigated. The experiment results showed that PHB did not affect on the growth performances of sturgeon juveniles but changed hindgut microbial community and highest bacterial diversity was observed at level of 2%. A decreased gut pH in PHB containing diets, increased mineral uptake in sturgeon muscle. PHB affected on the lipid metabolism and decreased lipid content in juveniles muscle. The effect of PHB on the hindgut histology was not tangible but high dose of PHB decreased fold height in the anterior midgut. 2% PHB improved the immunity response in juveniles but the lowest amount of IgM level was observed in 5% PHB. We also investigated the effects of feeding Artemia nauplii enriched with or without PHB and /or HUFA on growth performance and gut microbial community in sturgeon larvae. The results showed that feeding Artemia nauplii enriched with PHB and PHB+HUFA decreased growth performances and tolerance to environmental stresses in the larvae. PHB increased lipid content and changed the microbial community in the hindgut.