Cited by 60Aquaculture Nutrition and GrowthAnimal Nutrition and PhysiologyAquaculture disease management and microbiota

High lipid microalgae (Schizochytrium sp.) inclusion as a sustainable source of n-3 long-chain PUFA in fish feed—effects on the extrusion process and physical pellet quality

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Samuelsen, T.A., Oterhals, Å., Kousoulaki, K.·2018·Animal Feed Science and Technology

Abstract

The aim of this research was to investigate effects on the extrusion process and physical pellet quality of high lipid microalgae (HL-microalgae) inclusion level as a source of n-3 long-chain polyunsaturated fatty acids (n-3 LC-PUFA) in fish feed. The experiment was based on a 3-component mixture design on commercially relevant feed blends by varying the content of dried HL-microalgae Schizochytrium sp. meal, vital wheat gluten (WG), and soy protein concentrate (SPC). Mixture models with R2 in the range of 0.881–0.998 (P<0.01) were established for specific mechanical energy (SME), feed melt viscosity and temperature behind die, expansion parameters, and pellet hardness and durability. The mixture components affected SME, melt viscosity and viscous heat dissipation with the highest values observed for SPC followed by WG, and lowest for HL-microalgae rich blends. Increase in viscous heat dissipation and feed melt temperature increased the steam flashing rate and consequently pellet expansion and fat adsorption capacity. Lowest pellet hardness and durability were found for blends high in HL-microalgae or SPC level due to incomplete cooking. HL-microalgae addition up to 132g/kg DM in SPC rich blends gave favourable processing effects with respect to improved plasticisation and physical pellet quality. This study documents that HL-microalgae has a potential to be used as an alternative and sustainable source of n-3 LC-PUFA in aquaculture feeds without compromising physical pellet attributes.

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Crossref · 10.1016/j.anifeedsci.2017.11.020

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  • If a high lipid feed (>30%) is needed, as in salmon feed, oil has to be coated on the dried pellet using a vacuum coating process.

    “If a high lipid feed (>30%) is needed, as in the case of salmon feed, then oil has to be coated on the dried pellet using a vacuum coating process (Samuelsen et al., 2018).”

    From Potential of microalgae as a sustainable feed ingredient for aquaculture (2021) · cites this paper as Samuelsen et al., 2018

  • Lipid-rich microalgae can act as a lubricant in the extruder barrel, reducing viscous heat dissipation and lowering pellet quality.

    “For instance, lipid-rich microalgae can act as a lubricant in the extruder barrel, reducing viscous heat dissipation and lowering pellet quality (Samuelsen et al., 2018).”

    From Potential of microalgae as a sustainable feed ingredient for aquaculture (2021) · cites this paper as Samuelsen et al., 2018

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Authors
Samuelsen, T. A., Oterhals, Å., & Kousoulaki, K.
Affiliations
Nofima (NO)
Corresponding author
Samuelsen, T.A.
Venue
Animal Feed Science and Technology
Publisher
Elsevier BV
Published
2018-02
Volume
236
Pages
14-28
ISSN
0377-8401 (ISSN-L)
OpenAlex
W2770033659
Cited by
60
References
49
Citations by year
2026: 7 · 2025: 6 · 2024: 6 · 2023: 10 · 2022: 7 · 2021: 8 · 2020: 8 · 2019: 4 · 2018: 4
FWCI
5.06
Type
journal article
Language
en
Open access
Locations
  • Animal Feed Science and Technology (publishedVersion)
  • NORA - Norwegian Open Research Archives (submittedVersion, other-oa)
Funders
  • Research Council of Norway (234057/E40)
  • Alltech Inc.
Topics
  • Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Aquaculture Nutrition and Growth
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
  • Life Sciences › Immunology and Microbiology › Immunology › Aquaculture disease management and microbiota
Keywords
Schizochytrium, n-3 long-chain polyunsaturated fatty acids, fish feed, extrusion, pellet quality, specific mechanical energy, pellet hardness, pellet durability, soy protein concentrate, vital wheat gluten, aquaculture feed, sustainable feed ingredients

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