Two new studies demonstrate that phytase offers tilapia producers a threefold benefit, affecting performance, profitability and sustainability.
The trials, conducted in partnership with the Federal University of Parana in Brazil, showed that the addition of 2,000 FTU/kg of Quantum Blue phytase to tilapia diets resulted in improvements across nutrient digestibility and retention, as well as mineral status and feed conversion rates.
These improvements impact positively on feed costs and environmental welfare, which is of significant interest to producers, said Alexandre Barbosa de Brito, AB Vista LAM technical manager.
“Strategies for reducing feed costs – which can account for 60% of total production expenditure – and minimising ecological damage are becoming increasingly important in the fish industry,” stressed de Brito. “The effect of phytase represents benefits for both: the improved mineral status spares 0.25% of available phosphorus, reducing production costs, whilst the increased retention of nutrients results in lower levels of water pollution.”
Phosphorus release
Outlining the related mode of action of the enzyme, de Brito explained: “Quantum Blue breaks down the phytate found in plant-based ingredients, releasing phosphorus that otherwise would not be available. In addition, calcium ions are released, which are usually linked to the phytate molecule – and therefore are unavailable for absorption.
“In addition, it was demonstrated throughout these recent trials that phytate affects endogenous secretions by the animal, and reduces the digestibility of various nutrients in the intestinal lumen of the animals, which can be attenuated by the addition of phytase.”
The studies will be presented by AB Vista at this month’s Latin American & Caribbean Aquaculture (LACQUA) Congress.
