| Titles |
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English :
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Effects of L-carnitine on growth performance of Nile tilapia (Oreochromis niloticus) fingerlings fed basal diet or diets containing decreasing protein levels
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| Abstract |
The effects of L-carnitine on growth rate, feed utilization efficiency and protein sparing of Nile tilapia (Oreochromis niloticus L.) fingerlings were investigated in two consecutive experiments. In experiment I, triplicate groups of 10 fingerlings (4.16 ±0.07) each were stocked in 85 L glass aquaria, filled with 70 L dechlorinated tap water. Five levels of L-carnitine (0, 75, 150, 300, 450 mg/kg) were separately added to the basal diet (30% crude protein and 18.74 Mj GE/kg). The fish were fed the diets, at a daily rate of 5% BW, twice a day for 70 days. The results revealed that fish growth rates, feed utilization and whole body protein and lipid levels were increased with increasing L-carnitine levels. In experiment 2, Nile tilapia fingerlings (4.3±0.1 g) were fed diets containing decreasing levels of protein (30, 25, and 20%) and supplemented with 450 mg L-carnitine/kg diet, for 84 days. Fish performance was not significantly affected with decreasing dietary protein levels up to 20%. These results suggest that dietary inclusion of L-carnitine in Nile tilapia diets may significantly reduce dietary protein requirements and may facilitate the use of fatty acids for obtaining energy and consequently, can spare dietary protein for somatic growth.
Keywords: L-carnitine, Nile tilapia, performance, protein sparing.
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| Publication year |
2010
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| Pages |
165-172
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| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| serial title |
Journal of American Science
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| ISSN |
1545-1003
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| Author(s) from ARC |
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| External authors (outside ARC) |
عبد الفتاح الصياد
كلية العلوم - جامعة الاسكندرية
نبيل فهمى عبد الحكيم
جامعة الازهر
حنان على ابوستيت
المركز القومى للبحوث
الدسوقى السيد العزب
جامعة الازهر
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| Agris Categories |
Animal feedingFisheries production
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AGROVOC
TERMS |
Fingerlings.
Growth rate.
Oreochromis niloticus.
Performance testing.
Tilapia.
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| Proposed Agrovoc |
L-carnitine;protein sparing;feed utilization efficiency;
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| Publication Type |
Journal
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