Reduced performance in fish fed high-soy feeds has been blamed on antinutrients, low methionine content and palatability issues. Pretreatment to inactivate anti-nutritional compounds and supplementation with amino acids improves soy-based feed performance, but not to control levels.
Ronald W. Hardy
The aquaculture industry has significantly reduced fishmeal levels in feeds for major farmed species. To further reduce fishmeal use, new research approaches are essential.
In a study, ground barley containing different levels of beta-glucan was substituted for wheat in experimental diets fed to rainbow trout.
The large-scale shift of corn from animal feed to ethanol production is a potentially disruptive force in the feed ingredient world.
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.
Technical literature varies in reporting the ability of vitamins to improve fish survival and resistance to disease following infection with pathogens.
BMPs for salmon feed manufacturers cover formulation and evaluation of ingredients, while farmers should focus on amount, frequency and delivery of feed.
Evaluating trout performance fed diets with supplemental lysine in plant protein meal, and total ammonia nitrogen and soluble phosphorus excretion.