Effect of Proplex-DY and Proplex-T on growth performance of Atlantic salmon smolts

Authors: Burr, Gary; Peterson, Brian; BLOCK, STEPHANIE - Archer Daniels Midland; BOWZER, JOHN - Archer Daniels Midland; SEALEY, WENDY - Us Fish And Wildlife Service

Submitted to: Journal of the World Aquaculture Society
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/24/2020
Publication Date: N/A
Citation: N/A

Interpretive Summary: Atlantic salmon (Salmo salar) is an important cultured species and the feed for this species continues to include increasing amounts of alternative proteins. Juvenile Atlantic salmon were fed diets containing between 0 to 15% Proplex DY (single cell yeast ingredient) and then in a subsequent trial either 0 or 5% Proplex DY and 0 to 8% Proplex T (single cell bacterial protein ingredient). Salmon fed the Proplex DY diets were fed for 16 weeks and the salmon fed the combination diets were fed for 32 weeks. Atlantic salmon fed the Proplex DY diets did not have significant growth differenced compared to the fishmeal reference diet. Feed conversion ratio was not affected by the dietary treatments. Proximate composition did not vary except for ash which was lower for fish fed the 15% DY diet. In the second trial, the inclusion of single cell protein ingredients did not affect growth, or proximate composition. The fillets from fish fed diets containing Proplex DY had higher b* scores compared to the other dietary treatments indicating the fillets had a slightly yellower appearance. Overall, both of the single cell proteins can be added to salmon diets with out affecting performance as long as Proplex DY is kept below 15% and Proplex T below 8%.

Technical Abstract: Atlantic salmon (Salmo salar) is an important cultured species and the feed for this species continues to include increasing amounts of alternative proteins. Juvenile Atlantic salmon were fed diets containing between 0 to 15% Proplex DY and then in a subsequent trial either 0 or 5% Proplex DY and 0 to 8% Proplex T. Salmon fed the Proplex DY diets were fed for 16 weeks and the salmon fed the combination diets were fed for 32 weeks. Atlantic salmon fed the Proplex DY diets did not have significant growth differenced compared to the fishmeal reference diet. Feed conversion ratio was not affected by the dietary treatments. Proximate composition did not vary except for ash which was lower for fish fed the 15% DY diet. In the second trial, the inclusion of single cell protein ingredients did not affect growth, or proximate composition. The fillets from fish fed diets containing Proplex DY had higher b* scores compared to the other dietary treatments indicating the fillets had a slightly yellower appearance. Overall, both of the single cell proteins can be added to salmon diets with out affecting performance as long as Proplex DY is kept below 15% and Proplex T below 8%.