Publications

Titles

English :

Efficiency of using low plant protein diets containing some feed additives on growth performance and body composition of Nile Tilapia (Oreochromis niloticus) fry

Arabic :

كفاءة استخدام علائق نباتية منخفضة البروتين تحتوى على بعض الاضافات الغذائية على اداء النمو و تركيب جسم مفرخات اسماك البلطى النيلى

Abstract

The present experiment was carried out to evaluate the possible impact of thyme as a natural antioxidant, citric acid and sodium sulphate on improving the utilization of plant protein diets fed to Nile tilapia (Oreochromis niloticus) fry. Seven experimental diets were formulated and fed to mono-sex Nile tilapia (Oreochromis niloticus) fry with average initial weight of 0.80 ± 0.03g. The control diet (T1) was formulated to contain 30% CP (5% fish meal) and (4598 kcal GE/Kg). To investigate the effects of using low protein diets with or without adding some feed additives, the others six diets were formulated almost isonitrogenous (25% CP) and iso-caloric ( 4470 ± 37 Kcal GE) and no fish meal was used in their formulations. The second diet (T2) presented as basal diet where no feed additives were added, while the rest diets; from T3 to T7; were added with 0.3, 0.3, 0.6, 0.5 and 1.1 % of thyme, citric acid, 1:1 thyme + citric acid, sodium sulphate Na2 So4 and mixture of thyme + citric acid + sodium sulphate; respectively. The results concluded that addition of either thyme, citric acid or sodium sulphate improved the utilization of low protein diets and addition mixture of the three additives significantly increased weight gain (43.82%), PPV (11.90%), EU (34.75%) and protein content in fish carcass (7.01 %), compared to basal diet (T2). These results showed that mixture of thyme, citric acid and sodium sulphate is the most successful additives for improving performance of Nile tilapia fish fed low protein diets. Keywords: tilapia, low protein diets, feed additives, thyme, citric acid, sodium sulphate

Publication year

2010

Pages

607-621

Availability location

معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة

Availability number

Organization Name

Animal Production Research Institute (APRI)

serial title

Egyptian Journal Nutrition and Feeds

ISSN