OMAR, E., ZAKI, M., ABDEL-HALIM, A. (1999). DRIED POULTRY MANURE (DPM) AS AN UNCONVEN-TIONAL PROTEIN SOURCE IN DIETS OF NILE TILAPIA (OREOCHROMIS NILOTICUS) AND COMMON CARP (CYPRINUS CARPIO L.). Egyptian Journal of Agricultural Research, 77(1), 433-450. doi: 10.21608/ejar.1999.326682
EGLAL OMAR; MOHAMED A. A. ZAKI; ABDEL-RAHMAN M. ABDEL-HALIM. "DRIED POULTRY MANURE (DPM) AS AN UNCONVEN-TIONAL PROTEIN SOURCE IN DIETS OF NILE TILAPIA (OREOCHROMIS NILOTICUS) AND COMMON CARP (CYPRINUS CARPIO L.)". Egyptian Journal of Agricultural Research, 77, 1, 1999, 433-450. doi: 10.21608/ejar.1999.326682
OMAR, E., ZAKI, M., ABDEL-HALIM, A. (1999). 'DRIED POULTRY MANURE (DPM) AS AN UNCONVEN-TIONAL PROTEIN SOURCE IN DIETS OF NILE TILAPIA (OREOCHROMIS NILOTICUS) AND COMMON CARP (CYPRINUS CARPIO L.)', Egyptian Journal of Agricultural Research, 77(1), pp. 433-450. doi: 10.21608/ejar.1999.326682
OMAR, E., ZAKI, M., ABDEL-HALIM, A. DRIED POULTRY MANURE (DPM) AS AN UNCONVEN-TIONAL PROTEIN SOURCE IN DIETS OF NILE TILAPIA (OREOCHROMIS NILOTICUS) AND COMMON CARP (CYPRINUS CARPIO L.). Egyptian Journal of Agricultural Research, 1999; 77(1): 433-450. doi: 10.21608/ejar.1999.326682
DRIED POULTRY MANURE (DPM) AS AN UNCONVEN-TIONAL PROTEIN SOURCE IN DIETS OF NILE TILAPIA (OREOCHROMIS NILOTICUS) AND COMMON CARP (CYPRINUS CARPIO L.)
1Faculty of Agriculture, Alexandria University, Egypt
2Central Laboratory for Aquaculture Research, Agricultural Research Centre, Giza, Egypt
Abstract
Different levels of dried poultry manure (DPM) 0,10,20 and 30% in isonitrogenous (30% CP) and isoenergetic (4.0 Kcal GE/g) diets were incorporated in diets of Nile tilapia (Oreochromis niloticus) and, common carp (Cyprinus carpio) reared in cotton net enclosures in an earthen pond for 112 days. The results showed that DPM in fish diets did not affect survival rates of tilapia, however, common carp was slightly affected. Fish gains and standing crops were significantly (P<0.01) higher in carp than tilapia, however, specific growth rates (SGR) were significantly higher (P<0.01) in tilapia than carp. The inclusion of more than 10% DPM in diets significantly (P<0.01) decreased fish gain, SGR% and standing crop as compared to the control diet (0% DPM), however, the reduction rates were higher in carp than tilapia especially at 30% DPM level. Tilapia contained significantly (P<0.01) higher dry matter (DM), crude protein (CP) and energy (GE, Kcal/g DM) than carp. Artificial feeding of fish significantly (P<0.01) increased DM%, CP%, EE% and energy content, while, ash% decreased as compared to natural feeding of both tilapia and carp. The inclusion of DPM in fish diets significantly (P<0.01) decreased fish body DM, CP, EE% and energy content, however, ash% increased. Feed intake was significantly (P<0.01) higher in carp than tilapia, however, values of feed and nutrient utilization (feed efficiency ratio (FER), protein efficiency ratio (PER), protein productive value (PPV%) and energy utilization (EU)} were significantly (P<0.01) higher in tilapia than carp. The depressive effect on values of feed and nutrient utilization (FER, PER, PPV, and EU%) were more pronounced in carp than tilapia with diets containing over 20% DPM as compared with the control diet. Inclusion of DPM decreased CP and phospholipids contents of fish, however, values of cholesterol increased significantly (P<0.05). Cost of test diets (LE/ ton) decreased with increasing the level of DPM in the diet. However, cost of feed required to produce one Kg gain was high with the diet containing 20% DPM for tilapia and carp and low with that containing 30% DPM for carp.
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