UTILIZATION OF SOME UNCONVENTIONAL PROTEIN SOURCES IN THE DIET OF BLUE TILAPIA (Oreochromis aureus) CULTURED IN NET ENCLOSURES | ||||
| Journal of Animal and Poultry Production | ||||
| Article 18, Volume 30, Issue 12, December 2005, Page 7521-7533 PDF (3.91 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2005.238461 | ||||
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| Author | ||||
| T. M. Srour, | ||||
| Department of Animal and Fish Production, Faculty of Agriculture (Saba Basha), Alexandria University. | ||||
| Abstract | ||||
| Sixteen weeks feeding experiment was conducted in net enclosures to study the effect of dietary kochia (Kochia indica) dried leaves and buds (KOLB) together with different unconventional protein sources on growth performance, feed utifization and carcass composition of blue tilapia (Oreochromis aureus). Two dietary levels of KOLB (15 and 30 %) were used with four protein sources [fish meal (FM), poultry viscera meal (PVM) yeast and the basal diet protein]. Forming eight isocaloric diets, approximately 23 % crude protein, were fed to duplicate groups of fish (initial weight 15.5 g) at a daily rate of 2.5 % of their body weight. The results revealed that growth performance and feed utilization of fish fed on 15 % KDLB diets were significantly higher than that fed 30 % KOLB diets. Feed conversion ratio of fish received the diets contained fish meal surpassed the other groups, followed by those received PVM then yeast and finally the basal diet. There were insignificant (P > 0.05) differences between fish fed diets contained FM or PVM in feed intake, PER, PPV and EU, While, significant differences were noticed between fish fed the diets contained yeast and those fed the basal diets. Body composition of fish was affected by dietary KOLB levels and protein sources. Moreover, the economical analysis of the tested diets indicated that inclusion of 30 % KOLB with PVM into the diet was the best, followed by that contained 15 % KOLB with PVM compared to the other tested diets. These data suggested that the inclusion of 15 % KOLB with poultry viscera meal could be used in the diet of blue tilapia without any adverse effect on either growth performance or feed and nutrient utilization compared to FM diets. | ||||
| Keywords | ||||
| Tilapia; Protein sources; Kochia | ||||
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