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Siberian sturgeon (Acipenser baerii) larvae fed Artemia nauplii enriched with poly-beta-hydroxybutyrate (PHB): effect on growth performance, body composition, digestive enzymes, gut microbial community, gut histology and stress tests Najdegerami, H; Baruah, K.; Shiri, A.; Rekecki, A.; Van Den Broeck, W.; Sorgeloos, P.; Boon, N.; Bossier, P.; De Schryver, P. (2015). Siberian sturgeon (Acipenser baerii) larvae fed Artemia nauplii enriched with poly-beta-hydroxybutyrate (PHB): effect on growth performance, body composition, digestive enzymes, gut microbial community, gut histology and stress tests. Aquac. Res. 46(4): 801-812. dx.doi.org/10.1111/are.12231 In: Aquaculture Research. Blackwell: Oxford. ISSN 1355-557X; e-ISSN 1365-2109

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 279054 [ download pdf ]

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Trefwoorden

Acipenser baerii Brandt, 1869 [WoRMS]; Artemia Leach, 1819 [WoRMS]

Author keywords

Poly--hydroxybutyrate; sturgeon; growth performance; body composition;digestive enzymes; gut microbial community; gut histology; stress tests

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Auteurs		Top
Najdegerami, H Baruah, K. Shiri, A.	Rekecki, A. Van Den Broeck, W. Sorgeloos, P.	Boon, N. Bossier, P. De Schryver, P.

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Abstract

The effects of feeding Artemia nauplii enriched with or without poly-ß-hydroxybutyrate (PHB) and/or highly unsaturated fatty acids (HUFA) on Siberian sturgeon (Acipenser baerii) larvae were investigated. Feeding larvae with PHB-enriched nauplii (PHB, PHB + HUFA) decreased the growth performance of the larvae. PHB affected the body composition by increasing the lipid content of the whole body and decreasing total saturated, monoenoic, n3, n6 and decosahexanoeic acid (DHA) in the larvae, indicating that the PHB addition affected lipid metabolism. A high activity of pepsin was observed in the digestive extracts of PHB treatments (PHB, PHB + HUFA), while PHB suppressed amylase activity in the intestine of the larvae. Based on molecular analysis, PHB changed the microbial community in the distal intestine of the larvae. The highest counts of goblet cells were observed in the HUFA-containing treatments (HUFA, PHB + HUFA), indicating that HUFA addition may improve the mucosal barrier defence system. The overall quality of the larvae was evaluated by exposing them to different salinities and ammonia stress levels. PHB decreased survival rates in these challenges. Our results show that optimal PHB doses for bio-encapsulation into Artemia remain to be determined for further application at the earliest larval stages of sturgeon.

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