Increased attention to nutrient digestibility and gut health are two important focus areas for technological development of manufactured feeds in the aquaculture industry. Both laboratory and field studies have demonstrated the potential benefits for aquaculture productivity and the economics of
Cholesterol is an essential nutrient for penaeid shrimp. Trials found that a digestibility enhancer based on natural emulsifiers was as effective as purified cholesterol in improving shrimp growth and feed conversion.
In a study with pangasius, dietary administration of a blend of botanical extracts improved performance, reducing intensity of gill parasite infestation.
Through two lab trials, the authors examined the potential of feed additives to increase growth and feed utilization in Nile tilapia.
In a study with gilthead sea bream, two test diets used primarily soy products as sources of protein and fat against a reference feed based largely on fishmeal and fish oil.
By comparing the growth of shrimp fed different diets in big versus small net pens, trial results suggested that shrimp could compensate for lower diet quality by grazing on the algae growing on the surfaces of the net cages.
A laboratory study indicated gilthead sea bream can be grown on feeds in which fishmeal and fish oil levels are reduced from traditional values using soy products.
In trials, finishing diets improved the appearance of sea bass and sea bream with equivalent or higher performance than that achieved with standard grow-out diets.