Global Advanced Research Journal of Agricultural Science (GARJAS) ISSN: 2315-5094
July 2016 Vol. 5(7): pp. 293-301
Copyright © 2016 Global Advanced Research Journals

 

Full Length Research Paper

Replacement of Fish Meal with Poultry By-product Meal (PBM) and its effects on the Survival, Growth, Feed Utilization, and Microbial Load of European Seabass, Dicentrarchus labrax fry

Srour, T. M.1, Essa, M. A.2*, Abdel-Rahim,M. M.2., Mansour, M. A1.

 

1 Faculty of Agriculture - Saba Basha , Alexandria University, Egypt.

2 National Institute of Oceanography and Fisheries (NIOF), Alexandria, Egypt.

Email: messa51@yahoo.com

Accepted 15 July, 2016

 

Abstract

Replacement of fishmeal with poultry by-product meal (PBM) on an ideal isonitrogenous/isocaloric diets for seabass was evaluated. Four diets were formulated to contain 48% protein, 14% lipid and 4.8 kcal/g. In these diets, fish meal was replaced with PBM at levels 0, 20, 40, and 60%. Fish fry (0.73 gm/pceIW) were stocked in 12 fiberglass tanks at density of 25 fry/m3. Fish were fed at 10% BW/day through three meals and gradually decreased to 6% during the last week of experiment that continued for 70 days. Results of survival, growth, feed utilization, carcass composition and microbial load were evaluated. Growth performance results showed a non-significant differences between control and both 20% PBM and 40%PBM. However, the best growth rate was obtained at 60% PBM giving the best SGR (3.52%/day). Contrary, survival decreased significantly (P < 0.05) at 60% PBM (94%), while other treatments showed no mortalities. FCR, PER, PPV, EU values revealed that replacing fish meal with PBM did not negatively affect the efficiency of feed utilization and the best results were obtained at 60% PBM. Protein and lipid content in fish carcass increased in PBM diets. Aeromonas, salmonella, and E. coli in fish carcass and rearing water were less than control.  Results clearly demonstrated that, replacement of fish meal with PBM up to 60% of Seabass diets is acceptable. However, replacing 40% PBM instead of fish meal is the optimum level in terms of keeping both fish survival and fish welfare in the best levels.

Keywords: European Seabass, Nutrition, Poultry By-Product (PBM), survival, growth, feed utilization, microbial load.

   


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