Can fish grow on trees? Nutritional and functional properties of yeasts in diets for Atlantic salmon (Salmo salar)
Yeasts are gaining attention as alternative ingredients in fish feeds. The nutritional and health potentials of non-saccharomyces yeasts in fish are scarce in literature. Three non-saccharomyces yeasts; Cyberlindnera jadinii (CJ), Blastobotrys adeninivorans (BA) and Wickerhamomyces anomalus (WA) are...
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Norwegian University of Life Sciences, Ås
2022
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Online Access: | https://hdl.handle.net/11250/3038543 |
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ftunivmob:oai:nmbu.brage.unit.no:11250/3038543 2023-05-15T15:31:29+02:00 Can fish grow on trees? Nutritional and functional properties of yeasts in diets for Atlantic salmon (Salmo salar) Kan fisk vokse på trær? Næringsverdi og funksjonelle egenskaper av gjær i fôret til Atlantisk laks (Salmo salar) Agboola, Jeleel Opeyemi Øverland, Margareth Hansen, Jon Øvrum Arntzen, Magnus Øverlie Norway, Ås. 2022 application/pdf https://hdl.handle.net/11250/3038543 eng eng Norwegian University of Life Sciences, Ås Phd Thesis;2022:11 Foods of Norway, a centre for Research-based Innovation (the Research Council of Norway; grant no. 237841/030) https://hdl.handle.net/11250/3038543 Navngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-sa/4.0/deed.no CC-BY-NC-SA VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 Doctoral thesis 2022 ftunivmob 2022-12-21T23:44:10Z Yeasts are gaining attention as alternative ingredients in fish feeds. The nutritional and health potentials of non-saccharomyces yeasts in fish are scarce in literature. Three non-saccharomyces yeasts; Cyberlindnera jadinii (CJ), Blastobotrys adeninivorans (BA) and Wickerhamomyces anomalus (WA) are the focus of this thesis. The objective of the current thesis was to investigate the nutritional values and health effects of the three selected yeasts in the diets of Atlantic salmon (Salmo salar) with focus on growth performance, intestinal health, gut microbiota, and immune responses of fish. The three yeasts were produced in-house using a growth medium containing a blend of enzymatic hydrolysates of pre-treated spruce wood (Picea abies) and chicken by-products. After harvesting, the selected yeasts were processed by direct heat-inactivation with spray-drying (ICJ, IBA and IWA) or autolyzed at 50 ºC for 16 h, followed by spray-drying (ACJ, ABA and AWA). The present thesis comprises of seven papers. Paper I used a desk study approach to review the state-of-the art on the use of yeasts in fish feeds and identified gaps in literature regarding the use of yeasts as aquafeed ingredients. Yeasts are efficient converter of low-value non-food biomass into high-value resources. Yeasts showed comparatively similar amino acids with fishmeal (FM) and soybean meal (SBM), except for methionine, lysine, arginine, and phenylalanine which need to be supplemented when used in fish feeds. Genetic modification and/or nutrient digestibility through exogenous enzyme supplementation and the use of cost-effective down-stream processing (DSP) are possible strategies to increase the nutritive values of yeasts in fish. Additional investment in large-scale production at competitive price is needed for yeasts to be considered as feasible replacement for FM and SBM in fish feeds. Paper II investigated the impacts of yeast species and processing on performance, immune response and gut health of Atlantic salmon fry fed SBM-based diet in ... Doctoral or Postdoctoral Thesis Atlantic salmon Salmo salar Open archive Norwegian University of Life Sciences: Brage NMBU Norway |
institution |
Open Polar |
collection |
Open archive Norwegian University of Life Sciences: Brage NMBU |
op_collection_id |
ftunivmob |
language |
English |
topic |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 |
spellingShingle |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 Agboola, Jeleel Opeyemi Can fish grow on trees? Nutritional and functional properties of yeasts in diets for Atlantic salmon (Salmo salar) |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 |
description |
Yeasts are gaining attention as alternative ingredients in fish feeds. The nutritional and health potentials of non-saccharomyces yeasts in fish are scarce in literature. Three non-saccharomyces yeasts; Cyberlindnera jadinii (CJ), Blastobotrys adeninivorans (BA) and Wickerhamomyces anomalus (WA) are the focus of this thesis. The objective of the current thesis was to investigate the nutritional values and health effects of the three selected yeasts in the diets of Atlantic salmon (Salmo salar) with focus on growth performance, intestinal health, gut microbiota, and immune responses of fish. The three yeasts were produced in-house using a growth medium containing a blend of enzymatic hydrolysates of pre-treated spruce wood (Picea abies) and chicken by-products. After harvesting, the selected yeasts were processed by direct heat-inactivation with spray-drying (ICJ, IBA and IWA) or autolyzed at 50 ºC for 16 h, followed by spray-drying (ACJ, ABA and AWA). The present thesis comprises of seven papers. Paper I used a desk study approach to review the state-of-the art on the use of yeasts in fish feeds and identified gaps in literature regarding the use of yeasts as aquafeed ingredients. Yeasts are efficient converter of low-value non-food biomass into high-value resources. Yeasts showed comparatively similar amino acids with fishmeal (FM) and soybean meal (SBM), except for methionine, lysine, arginine, and phenylalanine which need to be supplemented when used in fish feeds. Genetic modification and/or nutrient digestibility through exogenous enzyme supplementation and the use of cost-effective down-stream processing (DSP) are possible strategies to increase the nutritive values of yeasts in fish. Additional investment in large-scale production at competitive price is needed for yeasts to be considered as feasible replacement for FM and SBM in fish feeds. Paper II investigated the impacts of yeast species and processing on performance, immune response and gut health of Atlantic salmon fry fed SBM-based diet in ... |
author2 |
Øverland, Margareth Hansen, Jon Øvrum Arntzen, Magnus Øverlie |
format |
Doctoral or Postdoctoral Thesis |
author |
Agboola, Jeleel Opeyemi |
author_facet |
Agboola, Jeleel Opeyemi |
author_sort |
Agboola, Jeleel Opeyemi |
title |
Can fish grow on trees? Nutritional and functional properties of yeasts in diets for Atlantic salmon (Salmo salar) |
title_short |
Can fish grow on trees? Nutritional and functional properties of yeasts in diets for Atlantic salmon (Salmo salar) |
title_full |
Can fish grow on trees? Nutritional and functional properties of yeasts in diets for Atlantic salmon (Salmo salar) |
title_fullStr |
Can fish grow on trees? Nutritional and functional properties of yeasts in diets for Atlantic salmon (Salmo salar) |
title_full_unstemmed |
Can fish grow on trees? Nutritional and functional properties of yeasts in diets for Atlantic salmon (Salmo salar) |
title_sort |
can fish grow on trees? nutritional and functional properties of yeasts in diets for atlantic salmon (salmo salar) |
publisher |
Norwegian University of Life Sciences, Ås |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3038543 |
op_coverage |
Norway, Ås. |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Phd Thesis;2022:11 Foods of Norway, a centre for Research-based Innovation (the Research Council of Norway; grant no. 237841/030) https://hdl.handle.net/11250/3038543 |
op_rights |
Navngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-sa/4.0/deed.no |
op_rightsnorm |
CC-BY-NC-SA |
_version_ |
1766362001353736192 |