Poultry byproduct meal can replace much of the fishmeal in shrimp diets. To better understand the nutritive value of its fat, the authors analyzed the fat components and conducted a feeding trial.
The substitution of plant proteins and oils for fishmeal and fish oil can result in minimal changes to proximate compositions in various fish. However, the muscle fatty acid composition usually reflects that of the diet.
Fish oil replacements in feeds alter the nutritional profiles of farmed fish. The challenge is to determine how and when to feed plant or fish oils to maintain desirable omega-3 levels in fillets.