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Stress presents a significant problem in aquaculture. Stress over time leads to a reduction in immune response and a decrease in the ability to fight against diseases. Current aquaculture techniques, therefore, involve the use of antibiotics and other chemicals to reduce disease and mortality within the crops, which is not good for the fish, their consumers, or the environment. In order to provide solutions to the problems of aquaculture and quality protein to consumers without the use of potentially harmful substances, we are looking into the use of nutraceuticals. For this experiment, we used probiotics in order to decrease stress responses, increase immune responses, increase growth, and increase the nutritional value of tilapia reared in recirculating aquaculture systems. Over a four-week long experiment, we measured Specific GrowthWeight (SGR), Absolute Feed Intake (FIABS), Feed Conversion Ratio (FCR), Protein Energy Retention (PER), Protein Production Value (PPV), and Fulton Condition Factor (K) for growth; blood glucose, packed cell volume, and plasma protein for physiology; and spleen-somatic index and macrophage phagocytic capacity for immune response. The results indicate that fish fed probiotic-supplemented commercial feed have better health indices than fish fed sham-supplemented commercial control feed in terms of all physiological and immunological responses.
Saillant, Kenneth, "Probiotics in Aquaculture" (2018). 2018 IPFW Student Research and Creative Endeavor Symposium. 39.