Replacement of fishmeal with processed meal from knife fish Chitala ornata in diets of juvenile Nile tilapia Oreochromis niloticus

• Published in: Aquaculture reports 2017-02, Vol.5 (C), p.76-83
• Main Authors: Abarra, Sherilyn T., Velasquez, Stephanie F., Guzman, Kristina Daniela D.C., Felipe, Jaime Lorenzo F., Tayamen, Melchor M., Ragaza, Janice A.
• Format: Article
• Language: English
• Subjects: Feed utilization; Fishmeal replacement; Growth performance; Invasive species; Knife fish; Nile tilapia
• ISSN: 2352-5134; 2352-5134
• DOI: 10.1016/j.aqrep.2017.01.001

•Inclusion of processed meal from knife fish (KFM) in diets improved growth performance and feed utilization efficiency in Nile tilapia juveniles.•Inclusion of KFM in diets did produce any adverse effects on the blood profile and carcass composition of Nile tilapia juveniles.•There were no tumors or lesions and parenchymal inflammation seen in the hepatic tissue of tilapia juveniles in all treatments.•Hepatic tissue showed mild cell lysis, and mild, mild to moderate apoptosis in all treatments.•KFM can partially and completely replace dietary protein from fishmeal. A 60-day feeding trial was conducted to assess the effects of processed meal from knife fish Chitala ornata (KFM) as fishmeal replacement in diets of Nile tilapia Oreochromis niloticus juveniles. Five iso-nitrogenous (36.4% in dry matter) and isolipidic diets (8.6% in dry matter) with 0 (D1), 25 (D2), 50 (D3), 75 (D4) and 100% (D5) KFM inclusions were prepared. With a stocking density of 15 fish (0.59±0.01g) per tank, tilapia juveniles were distributed randomly in fifteen 30-L tanks. Results indicate a significant increase (P