Brewery by-products (yeast and spent grain) as protein sources in rainbow trout (Oncorhynchus mykiss) feeds
A trial was conducted to analyze the effect of the inclusion of yeast and spent grain obtained from breweries in feeds for rainbow trout (Oncorhynchus mykiss), taking into account the availability of these by-products, produced in large quantities in Europe. The ingredients were assayed in both drie...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2022-09-01
|
| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2022.862020/full |
| _version_ | 1798004526689550336 |
|---|---|
| author | Alicia Estévez Lluis Padrell Bruno Iñarra Mikel Orive David San Martin |
| author_facet | Alicia Estévez Lluis Padrell Bruno Iñarra Mikel Orive David San Martin |
| author_sort | Alicia Estévez |
| collection | DOAJ |
| description | A trial was conducted to analyze the effect of the inclusion of yeast and spent grain obtained from breweries in feeds for rainbow trout (Oncorhynchus mykiss), taking into account the availability of these by-products, produced in large quantities in Europe. The ingredients were assayed in both dried and hydrolyzed format and compared with a commercial dried or hydrolyzed yeast. According to the results, the inclusion of 20% yeast and 15% spent grain in the feed, formulated with only 15% inclusion of fish meal, produced similar results in growth among all the groups, a food conversion significantly lower for the control and spent grain formulated feeds, and rainbow trout muscle composition similar to the fish fed with a control commercial feed and showed a protein digestibility of 87%–89% without differences with the commercial yeast. Hydrolysis of the ingredients had no effects on the protein digestibility of the feeds. Protein digestibility of the ingredients was lower for spent grain. An inclusion rate not higher than 15% for spent grain is recommended. These industrial by-products can be a good source to reduce the use of plant-based ingredients and increase the sustainability of both sectors, brewery industry, and aquaculture. |
| first_indexed | 2024-04-11T12:26:03Z |
| format | Article |
| id | doaj.art-b3bed9d49aee4f72b0baf0e51607df0a |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-04-11T12:26:03Z |
| publishDate | 2022-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-b3bed9d49aee4f72b0baf0e51607df0a2022-12-22T04:23:57ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452022-09-01910.3389/fmars.2022.862020862020Brewery by-products (yeast and spent grain) as protein sources in rainbow trout (Oncorhynchus mykiss) feedsAlicia Estévez0Lluis Padrell1Bruno Iñarra2Mikel Orive3David San Martin4Institute of Agrifood Research and Technology (IRTA) Sant Carles de la Rápita, Tarragona, SpainInstitute of Agrifood Research and Technology (IRTA) Mas Bové, Tarragona, SpainAZTI, Food Research, Basque Research and Technology Alliance (BRTA), Bizkaia, SpainAZTI, Food Research, Basque Research and Technology Alliance (BRTA), Bizkaia, SpainAZTI, Food Research, Basque Research and Technology Alliance (BRTA), Bizkaia, SpainA trial was conducted to analyze the effect of the inclusion of yeast and spent grain obtained from breweries in feeds for rainbow trout (Oncorhynchus mykiss), taking into account the availability of these by-products, produced in large quantities in Europe. The ingredients were assayed in both dried and hydrolyzed format and compared with a commercial dried or hydrolyzed yeast. According to the results, the inclusion of 20% yeast and 15% spent grain in the feed, formulated with only 15% inclusion of fish meal, produced similar results in growth among all the groups, a food conversion significantly lower for the control and spent grain formulated feeds, and rainbow trout muscle composition similar to the fish fed with a control commercial feed and showed a protein digestibility of 87%–89% without differences with the commercial yeast. Hydrolysis of the ingredients had no effects on the protein digestibility of the feeds. Protein digestibility of the ingredients was lower for spent grain. An inclusion rate not higher than 15% for spent grain is recommended. These industrial by-products can be a good source to reduce the use of plant-based ingredients and increase the sustainability of both sectors, brewery industry, and aquaculture.https://www.frontiersin.org/articles/10.3389/fmars.2022.862020/fullBrewery by-productsvalorisationcircular economyprotein digestibilityprotein substitutionrainbow trout |
| spellingShingle | Alicia Estévez Lluis Padrell Bruno Iñarra Mikel Orive David San Martin Brewery by-products (yeast and spent grain) as protein sources in rainbow trout (Oncorhynchus mykiss) feeds Frontiers in Marine Science Brewery by-products valorisation circular economy protein digestibility protein substitution rainbow trout |
| title | Brewery by-products (yeast and spent grain) as protein sources in rainbow trout (Oncorhynchus mykiss) feeds |
| title_full | Brewery by-products (yeast and spent grain) as protein sources in rainbow trout (Oncorhynchus mykiss) feeds |
| title_fullStr | Brewery by-products (yeast and spent grain) as protein sources in rainbow trout (Oncorhynchus mykiss) feeds |
| title_full_unstemmed | Brewery by-products (yeast and spent grain) as protein sources in rainbow trout (Oncorhynchus mykiss) feeds |
| title_short | Brewery by-products (yeast and spent grain) as protein sources in rainbow trout (Oncorhynchus mykiss) feeds |
| title_sort | brewery by products yeast and spent grain as protein sources in rainbow trout oncorhynchus mykiss feeds |
| topic | Brewery by-products valorisation circular economy protein digestibility protein substitution rainbow trout |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2022.862020/full |
| work_keys_str_mv | AT aliciaestevez brewerybyproductsyeastandspentgrainasproteinsourcesinrainbowtroutoncorhynchusmykissfeeds AT lluispadrell brewerybyproductsyeastandspentgrainasproteinsourcesinrainbowtroutoncorhynchusmykissfeeds AT brunoinarra brewerybyproductsyeastandspentgrainasproteinsourcesinrainbowtroutoncorhynchusmykissfeeds AT mikelorive brewerybyproductsyeastandspentgrainasproteinsourcesinrainbowtroutoncorhynchusmykissfeeds AT davidsanmartin brewerybyproductsyeastandspentgrainasproteinsourcesinrainbowtroutoncorhynchusmykissfeeds |