| Titles |
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English :
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Effect of dietary high lysine and methionine levels on growth performance of Nile Tilapia (Oreochromis niloticus) fed on diet at different frequencies
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Arabic :
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تأثير اضافة مستويات عالية من الليسين و المثيونين على اداء النمو لاسماك البلطى النيلى المغذاة على عليقة بعدد مرات مختلفة
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| Abstract |
The present study was curried out at the aquaculture experimental station, Department of Animal Production, Faculty of Agriculture, AI-Azhar University, Cairo, Egypt during the period from 1/7 to 22/9/2004. A total number of 480 Nile tilapia fingerlings weighing 10.4± 0.4g/ fish were distributed into six experimental groups representing two lysine + methionine levels (the requirement and 30% over the recommended level). Within each amino acid level three feeding frequencies (2, 4 and 6 times daily) were tested. The experiment was conducted in fiber glass tanks, each of 1m3 total water volume supplied with aeration source in a recirculating closed water system. The applied treatments were performed in replicate tanks each with 40 fish. The experiment lasted 12 weeks after start. Results obtained are summarized in the following:
. Supplementing growing Nile tilapia with both lysine and methionine to reach 30% over the requirements improved significantly final weight, weight gains, protein productive value and energy utilization. However it had insignificant effects on feed conversion ratio and specific growth rate.
. Increasing feeding frequency from 2 to 4 or 6 times daily improved significantly final weight; weight gains and released significant effect on feed conversion ratio, specific growth rate and nutrient utilization parameters.
Both amino acids supplementation and feeding frequency released significant effects on chemical composition of whole tilapia bodies.
Keywords: Nile tilapia. lysine supplementation and feeding frequency.
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| Publication year |
2006
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| Pages |
55-70
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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 |
Egyptian Jouran Nutrition and Feeds
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| ISSN |
1110-6360
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| Author(s) from ARC |
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| External authors (outside ARC) |
نبيل فهمى عبد الحكيم
جامعة الازهر
عبد الوهاب عبد المعز عبد الوارث
جامعة الازهر
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Feeding frequency.
Growth.
Lysine.
Methionine.
Performance testing.
Tilapia.
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| Publication Type |
Journal
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