Defatted microalgae (Nannochloropsis sp.) from biorefinery as a potential feed protein source to replace fishmeal in European sea bass diets

Valente, Luísa; Custódio, Marco; Batista, Sónia; Fernandes, Helena; Kiron, Viswanath

doi:10.1007/s10695-019-00621-w

Cited by 54 publications

(43 citation statements)

References 48 publications

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“…Some studies have shown that defatted Nannochloropsis sp. can successfully replace 15% of fishmeal in European sea bass (Valente et al, 2019), and improve the digestibility of certain nutrients in Atlantic salmon (Sørensen et al, 2016). Therefore, it is necessary to explore the application of DS in fish feed.…”

Section: Introductionmentioning

confidence: 99%

Effects of the defattedSchizochytriumsp. on growth performance, fatty acid composition, histomorphology and antioxidant status of juvenile mirror carp (Cyprinus carpiovar.specularis)

Xiao

Xing

et al. 2021

Aquaculture Research

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Defatted Schizochytrium sp. (DS) is a by‐product of algae oil, which is rich in docosahexaenoic acid (DHA). In this study, five DS‐supplemented diets, including 0 (DS0), 30 (DS3), 60 (DS6), 90 (DS9) and 120 (DS12) g/kg, were used to evaluate the effects of dietary DS on juvenile mirror carp (Cyprinus carpio var. specularis). A total of 270 fish juvenile mirror carp (8.55 g/tail, eighteen fish per cage) were fed with five isonitrogenous and isolipidic diets for 8 weeks. The results showed that final body weight (FBW), weight gain (WG) and specific growth rate (SGR) first increased in DS6 group (p > 0.05) and then significantly decreased in DS12 group (p < 0.05). There were significantly higher crude protein (CP) and lower crude lipid (CL) levels in whole body and hepatopancreas of fish fed with DS6 and DS9 diets than those with DS0 and DS3 diets (p < 0.05). The level of DHA in the muscle, hepatopancreas and whole body was significantly increased by higher DS‐supplemented diets (DS6, DS9 and DS12) than that of the control group (p < 0.05). The atherogenic index (AI) and thrombosis index (TI) in the muscle of all treatment groups were significantly lower than those of the control group, while the hypocholesterolaemic/hypercholesterolaemic fatty acid ratio (h / H) index of treatment groups was significantly higher than that of the control group (p < 0.05).The height of fore‐intestinal villi of DS3 and DS6 groups was significantly higher than that in the control group (p < 0.05). Moreover, superoxide dismutase (SOD) activity of the serum and hepatopancreas in DS6, DS9 and DS12 groups was significantly higher than that in the control group (p < 0.05). Analyses based on the special growth rate and antioxidant status index revealed that the suitable DS range was 4.18%–6.00% (41.08–60 g/kg), which could improve the growth performance and health status of mirror carp.

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Section: Introductionmentioning

confidence: 99%

Effects of the defattedSchizochytriumsp. on growth performance, fatty acid composition, histomorphology and antioxidant status of juvenile mirror carp (Cyprinus carpiovar.specularis)

Xiao

Xing

et al. 2021

Aquaculture Research

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“…However, the use of vegetal proteins as an alternative source is associated with several disadvantages, including low palatability and digestibility [18], lack of essential omega−3 fatty acids (EPA and DHA) [19] and presence of many anti-nutritional factors [20]. Proteins from poultry, brewer's yeast (Saccharomyces cerevisiae), larvae insect meal (Hermetia illucens and Tenebrio molitor), or microalgae were reported to advantageously replace up to 76% of fishmeal without significantly impacting European sea bass performance [21][22][23][24][25][26]. However, data concerning the effects of fishmeal substitution on sea bass gut microbiota are scarce, and only focused on partial replacement of fishmeal by alternative protein sources [4,27].…”

Section: Introductionmentioning

confidence: 99%

Growth Performance and Adaptability of European Sea Bass (Dicentrarchus labrax) Gut Microbiota to Alternative Diets Free of Fish Products

et al. 2020

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Innovative fish diets made of terrestrial plants supplemented with sustainable protein sources free of fish-derived proteins could contribute to reducing the environmental impact of the farmed fish industry. However, such alternative diets may influence fish gut microbial community, health, and, ultimately, growth performance. Here, we developed five fish feed formulas composed of terrestrial plant-based nutrients, in which fish-derived proteins were substituted with sustainable protein sources, including insect larvae, cyanobacteria, yeast, or recycled processed poultry protein. We then analyzed the growth performance of European sea bass (Dicentrarchus labrax L.) and the evolution of gut microbiota of fish fed the five formulations. We showed that replacement of 15% protein of a vegetal formulation by insect or yeast proteins led to a significantly higher fish growth performance and feed intake when compared with the full vegetal formulation, with feed conversion ratio similar to a commercial diet. 16S rRNA gene sequencing monitoring of the sea bass gut microbial community showed a predominance of Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes phyla. The partial replacement of protein source in fish diets was not associated with significant differences on gut microbial richness. Overall, our study highlights the adaptability of European sea bass gut microbiota composition to changes in fish diet and identifies promising alternative protein sources for sustainable aquafeeds with terrestrial vegetal complements.

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“…It was found that a defatted microalgae meal (Nannochloropsis sp.) can be used (15% of the diet) to replace fish meal in the test diet without compromising the performance of the European sea bass [162].…”

Section: Direct Utilization Of Mraementioning

confidence: 99%

Comprehensive Utilization of Marine Microalgae for Enhanced Co-Production of Multiple Compounds

Wang

Chua

et al. 2020

Marine Drugs

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Marine microalgae are regarded as potential feedstock because of their multiple valuable compounds, including lipids, pigments, carbohydrates, and proteins. Some of these compounds exhibit attractive bioactivities, such as carotenoids, ω-3 polyunsaturated fatty acids, polysaccharides, and peptides. However, the production cost of bioactive compounds is quite high, due to the low contents in marine microalgae. Comprehensive utilization of marine microalgae for multiple compounds production instead of the sole product can be an efficient way to increase the economic feasibility of bioactive compounds production and improve the production efficiency. This paper discusses the metabolic network of marine microalgal compounds, and indicates their interaction in biosynthesis pathways. Furthermore, potential applications of co-production of multiple compounds under various cultivation conditions by shifting metabolic flux are discussed, and cultivation strategies based on environmental and/or nutrient conditions are proposed to improve the co-production. Moreover, biorefinery techniques for the integral use of microalgal biomass are summarized. These techniques include the co-extraction of multiple bioactive compounds from marine microalgae by conventional methods, super/subcritical fluids, and ionic liquids, as well as direct utilization and biochemical or thermochemical conversion of microalgal residues. Overall, this review sheds light on the potential of the comprehensive utilization of marine microalgae for improving bioeconomy in practical industrial application.

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Defatted microalgae (Nannochloropsis sp.) from biorefinery as a potential feed protein source to replace fishmeal in European sea bass diets

Cited by 54 publications

References 48 publications

Effects of the defattedSchizochytriumsp. on growth performance, fatty acid composition, histomorphology and antioxidant status of juvenile mirror carp (Cyprinus carpiovar.specularis)

Effects of the defattedSchizochytriumsp. on growth performance, fatty acid composition, histomorphology and antioxidant status of juvenile mirror carp (Cyprinus carpiovar.specularis)

Growth Performance and Adaptability of European Sea Bass (Dicentrarchus labrax) Gut Microbiota to Alternative Diets Free of Fish Products

Comprehensive Utilization of Marine Microalgae for Enhanced Co-Production of Multiple Compounds

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