Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.12348/4871
Replacing fishmeal with a single cell protein feedstuff in Nile tilapia Oreochromis niloticus diets

Abstract
- There is a growing concern about the use of fisheries-derived proteins in aquaculture. This study was conducted to investigate the effect of either partially or totally replacing fishmeal (up to 15% of the diet) by the inactivated dry yeast product DY-Pro in Nile tilapia Oreochromis niloticus diets. The DY-Pro replaced 0% (DY-PRO0), 2% (DY-PRO2), 5% (DY-PRO5), 25% (DY-PRO25), 50% (DY-PRO50), 75% (DY-PRO75) or 100% (DY-PRO100) of the protein provided by fishmeal in seven isonitrogenous and isocaloric experimental diets, which were fed to the experimental fish (initial average body weight 11.33 ± 1.65 g) for 12 weeks. At the end of the experiment, the graded replacement of 2–100% of fishmeal protein by the DY-Pro did not significantly (P < 0.05) affect fish weight gain or gut length and weight, but linearly (P < 0.05) improved feed and nutrient utilization. Moreover, the DY-Pro did not have any negative impacts on the gastrointestinal tract as shown by histopathology. There were no pathogens or signs of significant metabolic or toxicant-related disease in the epithelium. Results showed that tilapia given diets containing DY-Pro consumed less feed to achieve the same weight gain as tilapia given fishmeal-based diets. Overall, the DY-Pro is a good feed ingredient, which could totally replace fishmeal in Nile tilapia diets and possibly lead to reduced feed costs.
- External link to download this item: https://dx.doi.org/10.1016/j.anifeedsci.2021.115089
Collections
- Sustainable aquaculture [2521]
Date
- 2021
Author
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Yossa, R.
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Greiling, A.M.
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Komugisha, B.
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Sakala, M.
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Baumgartner, W.A.
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Taylor, A.
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Gatlin, D.
Author(s) ORCID(s)
- Rodrigue Yossahttps://orcid.org/0000-0003-4792-0173
- Basiita Rose Komugishahttps://orcid.org/0000-0002-7257-0286
Subject(s)
AGROVOC Keywords
Type
- Journal Article
Publisher
- Elsevier