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ARS Home » Southeast Area » Stuttgart, Arkansas » Harry K. Dupree Stuttgart National Aquaculture Research Cntr » Research » Publications at this Location » Publication #404689
Research Project: Enhancing the Production of Hybrid Striped Bass Through Improved Genetics, Nutrition, Production Management, and Fish Health

Location: Harry K. Dupree Stuttgart National Aquaculture Research Cntr

Title: Digestibility of conventional and novel dietary lipids in channel catfish Ictalurus punctatus

Author
item MAINA, ANDREW - University Of Arkansas At Pine Bluff
item LOCHMANN, REBECCA - University Of Arkansas At Pine Bluff
item Rawles, Steven - Steve
item ROSENTRATER, KURT - Iowa State University

Submitted to: Animals
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/18/2023
Publication Date: 4/25/2023
Citation: Maina, A., Lochmann, R., Rawles, S.D., Rosentrater, K. 2023. Digestibility of conventional and novel dietary lipids in channel catfish Ictalurus punctatus. Animals. 13(1456):1-13. https://doi.org/10.3390/ani13091456.
DOI: https://doi.org/10.3390/ani13091456

Interpretive Summary: The digestibility of ingredients in fish diets must be known to use the least-cost feed formulation. However, there is very little published information on lipid (fat) digestibility in fish. With this information, commercial feed producers can choose lipids based on high utilization by the fish, as well as cost. We conducted a feeding trial with catfish fed diets with different lipids: soybean oil, soybean oil with conjugated linoleic acids, catfish offal oil, flaxseed oil, menhaden fish oil and poultry fat. After feeding, fish feces were collected for nutrient analysis and compared to the lipid content of the diets. Lipid and fatty acid digestibility were high overall for all of the lipids tested. However, the digestibility of certain fatty acids was different from overall lipid digestibility. This information can be used to choose the best lipids to meet catfish needs, enhance healthy fats in the fish for human consumers, and produce a cost-effective feed.

Technical Abstract: The digestibility of ingredients in fish diets must be known to use the least-cost feed formulation. However, there is very little published information on lipid (fat) digestibility in fish. With this information, commercial feed producers can choose lipids based on high utilization by the fish, as well as cost. We conducted a feeding trial with catfish fed diets with different lipids: soybean oil, soybean oil with conjugated linoleic acids, catfish offal oil, flaxseed oil, menhaden fish oil and poultry fat. After feeding, fish feces were collected for nutrient analysis and compared to the lipid content of the diets. Lipid and fatty acid digestibility were high overall for all of the lipids tested. However, the digestibility of certain fatty acids was different from overall lipid digestibility. This information can be used to choose the best lipids to meet catfish needs, enhance healthy fats in the fish for human consumers, and produce a cost-effective feed.