EVALUATION OF AZOLLA PINNATA MEAL AS AN INGRE- DIENT IN DIETS FOR TILAPIA ZILLII FRY | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 36, Volume 76, Issue 3, September 1998, Page 1307-1316 PDF (2.47 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.1998.359110 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| ABDEL-RAHMAN M. M. ABDEL-HALIM1; THANAA SHANAB2; MOHSEN ABDEL-TAWWAB1 | ||||
| 1Central Laboratory for Aquaculture, Agricultural Research Centre, Abbassa, Abu-Hammad, Sharkia, Egypt | ||||
| 2Faculty of Science, Cairo University, Giza, Egypt | ||||
| Abstract | ||||
| Duplicate groups of Tilapia zillii fry reared in ten aquaria were fed one of isonitrogenously five different diets for 90 days. Formulated control diet containing 20% crude protein was used. A whole part of the diet was replaced with either 0, 25, 50, 75 or 100% Azolla pinnata meal. Results showed growth retardation of the fish proportional to the increasing Azolla level in the diet. Mortality rate reached 23% for fish fed 100% Azolla meal. Carcass composition showed increased moisture and ash contents and poorer content of CP and EE. Values of feed conversion ratios were higher; PER, PPV% and EU% were lower with increasing Azolla level. Azolla is not nutritionally efficient for T.zillii fry at high inclusion levels. However, levels below 25% may be promising as an ingredient in fish feed in view of being costless protein source. | ||||
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