Partial and full replacement of dietary fish oil by poultry fat feeds in rainbow trout, Oncorhynchus mykiss

• Published in: Journal of applied aquaculture Vol. 36; no. 2; pp. 386 - 406
• Main Authors: Seydanloo, Zohreh, Ghelichi, Afshin, Jorjani, Sarah, Ghojoghi, Fariborz
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 02-04-2024; Taylor & Francis Ltd
• Subjects: Enzymatic activity; Enzyme activity; fatty acid; Fatty acids; Fillets; Fish; Fish feeds; Fish fillets; Fish oils; growth performance; Oil; Oncorhynchus mykiss; Poultry; poultry fat; Rainbow trout; Salmon; Seafoods; Serum; Trout; washout period
• ISSN: 1045-4438; 1545-0805
• DOI: 10.1080/10454438.2023.2242829

The study investigated the effects of dietary fish oil replacement by poultry fat on growth performance, fillet quality, and serum enzymatic activities in rainbow trout, Oncorhynchus mykiss. The fish were fed three diets (0%, 50%, and 100% replacement) for 2 months with or without a washout period. No significant effects were observed among treatments on growth performance and viscerosomatic index or on fillet moisture, fat, protein, and ash contents (p > .05). Increased poultry fat led to decrease in ω-3 fatty acids and increase in ω-6 fatty acids and monounsaturated fatty acids. The washout period restored most of the changes in fillet fatty acid profiles and serum enzymatic activity in the fish feed containing poultry fat. In conclusion, replacement of dietary fish oil by poultry fat had no detrimental effects on fish growth performance, but reduced fish fillet ω-3 fatty acids, which can be restored via a washout period.