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TY - JOUR AU - Michael, Angelina AU - Kyewalyanga, Margareth S. AU - Lugomela, Charles V. PY - 2023/09/30 Y2 - 2025/07/30 TI - Spirulina (Arthrospira fusiformis, Gomont 1892) as a High-Quality Feed Ingredient for Nile Tilapia Fingerlings JF - Tanzania Journal of Science JA - Tanz. J. Sci. VL - 49 IS - 3 SE - Biological Sciences DO - 10.4314/tjs.v49i3.3 UR - http://tjs.udsm.ac.tz/index.php/tjs/article/view/1548 SP - 587-596 AB - <p>A partially randomized experimental design was conducted to evaluate the effect and potential of spirulina species (<em>Arthrospira fusiformis</em>) isolated from Momela Lakes, Tanzania, on the growth, antioxidant capacity, feed utilization, and body composition of Nile tilapia fingerlings. Five dietary treatments were formulated, including spirulina meal at 5%, 10%, and 15% of the total diets, as well as control diets with freshwater shrimp or Lake Victoria sardine. The protein content of the experimental diets was 25, 28, and 35% for a treatment containing spirulina at 5, 10, and 15% inclusion, respectively, while the control diets had 35% crude protein each. After eight weeks of feeding, fish fed with a lower inclusion level of spirulina showed the best growth performance and feed utilization efficiency, similar to the fish fed with control diets. The group fed with 5% spirulina exhibited excellent protein efficiency ratio compared to all other fish groups. All spirulina-fed fish groups demonstrated higher protein deposition and strong antioxidant activity against free radicals compared to those fed with control diets. In conclusion, spirulina proves to be a superior feed ingredient for high-quality Nile tilapia farming, providing comparable results to control feeds.</p> ER -