Poly-β-hydroxybutyrate (PHB) accumulating Bacillus spp. improve the survival, growth and robustness of Penaeus monodon (Fabricius, 1798) postlarvae

Laranja, Joseph Leopoldo Q.; Ludevese‐Pascual, Gladys; Amar, Edgar C.; Sorgeloos, Patrick; Bossier, Peter; Schryver, Peter De

doi:10.1016/j.vetmic.2014.08.011

Cited by 51 publications

(35 citation statements)

References 37 publications

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“…Additional work will be required to confirm this effect, but it should be noted that there is precedent for SCP sources to increase survival and to reduce gastroenteritis (Banerjee, Azad, Vikineswary, Selvaraj, & Mukherjee, 2000;Dabrowski, 1984;Laranja et al, 2014;Romarheim, Øverland, Mydland, Skrede, & Landsverk, 2011) and thus this may represent a significant value added even at a modest inclusion rate. Additional work will be required to confirm this effect, but it should be noted that there is precedent for SCP sources to increase survival and to reduce gastroenteritis (Banerjee, Azad, Vikineswary, Selvaraj, & Mukherjee, 2000;Dabrowski, 1984;Laranja et al, 2014;Romarheim, Øverland, Mydland, Skrede, & Landsverk, 2011) and thus this may represent a significant value added even at a modest inclusion rate.…”

Section: Resultsmentioning

confidence: 99%

Partial replacement of soybean meal with Methylobacterium extorquens single-cell protein in feeds for rainbow trout (Oncorhynchus mykiss Walbaum)

et al. 2018

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A feeding trial was conducted with juvenile rainbow trout (15-16 g initial weight) to assess the effects of including single-cell protein (SCP) produced from Methylobacterium extorquens in trout feeds. Three isonitrogenous and isoenergetic diets were produced: a control diet and two experimental diets containing 5% or 10% bacterial protein meal replacing soybean meal. Triplicate tanks, each containing 35 fish, were fed each diet to apparent satiation in a constant-temperature (15°C), flow-through tank system for 12 weeks. No statistically significant differences in final fish weight or other fish growth parameters were observed. Similarly, feed efficiency parameters showed no significant differences among groups. Nutrient retention indices (protein, fat, energy) were relatively high and similar among fish in each dietary treatment group, as were whole body proximate compositions. Fish survival was high, with a small but statistically significant increase for the 10% SCP diet. Overall, results demonstrate that SCP from M. extorquens is a safe and effective alternative protein for rainbow trout diets at the low inclusion levels tested. Slightly lower weight gain in fish fed the 10% SCP diet was largely due to lower feed intake, suggesting that adding palatability-enhancing ingredients to feeds may allow higher levels of M. extorquens SCP to be used without compromising fish growth. K E Y W O R D S alternative proteins, rainbow trout, single-cell protein, sustainable feeds wileyonlinelibrary.com/journal/are Aquaculture Research. 2018;49:2218-2224.

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Section: Resultsmentioning

confidence: 99%

Partial replacement of soybean meal with Methylobacterium extorquens single-cell protein in feeds for rainbow trout (Oncorhynchus mykiss Walbaum)

et al. 2018

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“…However, previous studies using bacteria accumulated with different PHB doses showed that the level of PHB was the main driver for the observed effects (e.g. disease resistance) (Laranja et al., ).…”

Section: Discussionmentioning

confidence: 96%

“…Under conditions of nutrient depletion and carbon excess, PHB is accumulated as a cellular carbon reserve by a wide range of bacterial genera such as Alcaligenes , Bacillus and Pseudomonas (Suriyamongkol, Weselake, Narine, Moloney & Shah, ; Wang, Sharma‐Shivappa, Olson & Khan, ). The compound has been shown to increase growth and survival of some aquatic species, including penaeid shrimps ( Penaeus monodon ) (Laranja et al., ), blue mussels ( Mytilus edulis ) (Hung et al., ) and European sea bass ( Dicentrarchus labrax ) juveniles (De Schryver et al., ). Additionally, dietary PHB altered the microbial community of the gastrointestinal (GI) tract in European sea bass juveniles (De Schryver et al., ).…”

Section: Introductionmentioning

confidence: 99%

Immunostimulatory effects of dietary poly-β-hydroxybutyrate in European sea bass postlarvae

et al. 2017

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The stable production of high‐quality fry in marine aquaculture is still hampered by unpredictable mortality caused by infectious diseases during larval rearing. Consequently, the development of new biocontrol agents is crucial for a viable aquaculture industry. The bacterial energy storage compound poly‐β‐hydroxybutyrate (PHB) has been shown to exhibit beneficial properties on aquatic organisms such as enhanced survival, growth, disease resistance and a controlling effect on the gastrointestinal microbiota. However, the effect of PHB on the developing immune system of fish larvae has so far not been investigated. In this study, the effect of feeding PHB‐enriched Artemia nauplii on survival, growth and immune response in European sea bass (Dicentrarchus labrax) postlarvae was examined. Amorphous PHB was administered to 28‐day‐old sea bass postlarvae over a period of 10 days. The survival and growth performance were monitored, and the expression of 29 genes involved in immunity, growth, metabolism and stress‐response was measured. While the expression of the insulin‐like growth factor 1 (igf1), an indicator of relative growth, was upregulated in response to feeding PHB, the larval survival and growth performance remained unaffected. After 10 days of PHB treatment, the expression of the antimicrobial peptides dicentracin (dic) and hepcidin (hep) as well as mhc class IIa and mhc class IIb was elevated in the PHB fed postlarvae. This indicates that PHB is capable of stimulating the immune system of fish early life stages, which may be the cause of the increased resistance to diseases and robustness observed in previous studies.

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“…The cause for the above observation is unclear; however, one may argue that dietary MOS exerts its protective effects by modulating other machineries (e.g., phagocytic activities, antioxidant activities; Merrifield et al ) of the defense system. The effects of dietary PHB on the generation of protective immune responses against pathogenic bacteria system have been well reported in different aquatic species (Baruah et al ; Laranja et al ; Nhan et al ; Suguna et al ; Sui et al ). Degradation of PHB by enzymatic and/or microbial activity in the GI tract of the organisms results in the release of β‐hydroxybutyric acid or PHB oligomers (Defoirdt et al ).…”

Section: Discussionmentioning

confidence: 99%

Evaluating the Effects of Dietary Prebiotic Mixture of Mannan Oligosaccharide and Poly‐β‐Hydroxybutyrate on the Growth Performance, Immunity, and Survival of Rainbow Trout, Oncorhynchus mykiss (Walbaum 1792), Fingerlings

Najdegerami

Tokmachi

Bakhshi

2016

J World Aquaculture Soc

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This study investigated the effects of dietary poly‐β‐hydroxybutyrate (PHB) and mannan oligosaccharide (MOS) on the growth performance, digestive enzyme activities, and disease resistance of rainbow trout fingerlings. A total of 420 fingerlings, distributed equally into four different groups, each with three replicates, were fed a basal diet (control), 2% PHB (PHB), 0.2% MOS (MOS), or a diet supplemented with a mixture of 2% PHB and 0.2% MOS (PHB+MOS) for 60 d. Results showed that dietary PHB and/or MOS did not cause significant improvement in the growth performance of the fingerlings. The gut pH was markedly reduced; however, the activities of the digestive enzymes (except for pepsin and amylase by dietary PHB) were not significantly improved by the dietary supplements. Results also showed that dietary PHB and/or MOS markedly increased the resistance of the fingerlings toward Yersinia ruckeri infection, while the lowest total antibody was observed in fish fed control and MOS, indicating that MOS exerts its protective effects by modulating other mechanisms. Overall, this study provided a first screening effort to determine the effects of PHB and/or MOS as dietary supplements in rainbow trout fingerlings to develop an optimal prebiotic mix for improving the growth and health status of rainbow trout.

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Poly-β-hydroxybutyrate (PHB) accumulating Bacillus spp. improve the survival, growth and robustness of Penaeus monodon (Fabricius, 1798) postlarvae

Cited by 51 publications

References 37 publications

Partial replacement of soybean meal with Methylobacterium extorquens single-cell protein in feeds for rainbow trout (Oncorhynchus mykiss Walbaum)

Partial replacement of soybean meal with Methylobacterium extorquens single-cell protein in feeds for rainbow trout (Oncorhynchus mykiss Walbaum)

Immunostimulatory effects of dietary poly-β-hydroxybutyrate in European sea bass postlarvae

Evaluating the Effects of Dietary Prebiotic Mixture of Mannan Oligosaccharide and Poly‐β‐Hydroxybutyrate on the Growth Performance, Immunity, and Survival of Rainbow Trout, Oncorhynchus mykiss (Walbaum 1792), Fingerlings

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