The use of probiotic blends in aquafeed has consistently demonstrated synergistic advantages in aquaculture, offering a more effective and sustainable approach to improving fish health and productivity. Notably, probiotic combinations enhance digestive efficiency by stimulating enzymatic activity in the intestinal tract, leading to better nutrient absorption and improved protein conversion—key factors in promoting optimal growth.
For example, studies with rainbow trout and Nile tilapia have shown that a blend of Lactobacillus plantarum and Lactococcus lactis significantly enhances growth rates and feed conversion efficiency compared to fish fed with single probiotic strains. This tailored mix effectively maximises feed utilisation, reducing waste and supporting more sustainable practices.
Additionally, probiotic blends boost innate immunity by leveraging the unique immune-activating properties of each strain. This synergy fosters a comprehensive and robust immune response, as evidenced in a study on tilapia where a combination of Bacillus subtilis and Lactobacillus rhamnosus heightened immune activity, specifically increasing lysozyme and complement system functions. This enhanced immune protection helps fish fend off diseases more effectively.
Probiotics also support a balanced gut microbiome, which is essential for disease prevention and resilience to stress. In European seabass, for instance, the combined use of Lactobacillus acidophilus and Enterococcus faecalis contributed to a healthier microbial environment in the gut, reinforcing natural defences against pathogens and improving stress tolerance.
Furthermore, blends such as Leuconostoc mesenteroides and Lactococcus lactis have demonstrated synergistic effects in boosting antioxidant activity, particularly in tilapia and carp. These combinations increase antioxidant enzyme levels, like superoxide dismutase, reducing oxidative tissue damage. This effect supports longevity and resilience, especially beneficial under intensive farming conditions.
In conclusion, using probiotic combinations in aquafeed is a promising strategy that enhances both fish wellbeing and aquaculture productivity. By delivering a holistic, safe, and sustainable solution, probiotic blends offer significant advantages that contribute to a healthier aquaculture ecosystem.
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