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Journal Article

Poly-ß-hydroxybutyrate administration during early life: effects on performance, immunity and microbial community of European sea bass yolk-sac larvae

MPS-Authors

Franke,  Andrea
Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society;

Roth,  Olivia
Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society;

De Schryver,  Peter
Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Bayer,  Till
Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society;

Garcia Gonzalez,  Linsey
Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Künzel,  Sven
Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society;

Bossier,  Peter
Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society;

Miest,  Joanna
Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society;

Clemmesen,  Catriona
Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Citation

Franke, A., Roth, O., De Schryver, P., Bayer, T., Garcia Gonzalez, L., Künzel, S., et al. (2017). Poly-ß-hydroxybutyrate administration during early life: effects on performance, immunity and microbial community of European sea bass yolk-sac larvae. Scientific Reports, 7(1): 15022. doi:10.1038/s41598-017-14785-z.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002E-8E39-E
Abstract
The reliable production of marine fish larvae is one of the major bottlenecks in aquaculture due to high mortalities mainly caused by infectious diseases. To evaluate if the compound poly-β-hydroxybutyrate (PHB) might be a suitable immunoprophylactic measure in fish larviculture, its capacity to improve immunity and performance in European sea bass (Dicentrarchus labrax) yolk-sac larvae was explored. PHB was applied from mouth opening onwards to stimulate the developing larval immune system at the earliest possible point in time. Larval survival, growth, microbiota composition, gene expression profiles and disease resistance were assessed. PHB administration improved larval survival and, furthermore, altered the larva-associated microbiota composition. The bacterial challenge test using pathogenic Vibrio anguillarum revealed that the larval disease resistance was not influenced by PHB. The expression profiles of 26 genes involved e.g. in the immune response showed that PHB affected the expression of the antimicrobial peptides ferritin (fer) and dicentracin (dic), however, the response to PHB was inconsistent and weaker than previously demonstrated for sea bass post-larvae. Hence, the present study highlights the need for more research focusing on the immunostimulation of different early developmental stages for gaining a more comprehensive picture and advancing a sustainable production of high quality fry.