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Effect of the dietary protein and lipid levels on growth performance and some blood constituents of tilapia fish (Oreochromis niloticus and O. Aureus) [electronic resource].

By:

Farag, E. Mohamed

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Language: English Summary language: Arabic Description: P. 138-148Other title:

تأثير مستويات بروتين ودهن العليقة على أداء النمو وبعض مركبات الدم فى أسماك البلطى النيلى والاوريا [Added title page title]

Uniform titles:

Zagazig veterinary journal, 2008 v. 36 (2) [electronic resource].

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In: Zagazig Veterinary Journal 2008.v.36(2)Summary: This work was carried out to study the effect of two levels of protein (25&35%) and two levels of lipid (8 &16%) on the growth performance and some blood constituent of tilapia fish (Oreochromis niloticus and Oreochromis aureus). A 70-day feeding trial was conducted in hapa with tilapia fish, (0. niloticus and O. aureus), with an average initial weight of 50.31±1.92g and 41.14±1.15g, respectively, to examine the effect of two protein levels and two fat levels on growth performance and some blood constituents. Twelve hapa (2.0 xl.0x 1.0 m, each) were stocked with 10 fish and fed diets containing either 25% or 35% crude protein at crude fat of 8% or 16% (2 x2 factorial experiment). The results revealed that there was a significant increase in the final body weight and weight gain of O. niloticus and O. aureus with increasing dietary protein and lipid levels. However, feeding diet containing 35% protein + lipid 16% resulted in significantly higher final body weight and weight gain for O. nilotica and O. aurea. Feed conversion ratio of O. niloticus was improved significantly by increase dietary protein level, while feed conversion ratio of O. aureus was non significant difference by both dietary protein and fat levels. The best feed conversion ratio was obtained in both fish species by diet containing35% crude protein + 16% fat. Gonadosomatic index was significantly higher by increased protein and fat levels. The higher gonadosomatic index was observed when diet containing 35% protein + 16 fat to female and male of both fish species (0. nilotica and O. aurea). Hemoglobin (Hb), Mean corpuscular hemoglobin (MCH) and Mean corpuscular hemoglobin concentration (MCHC) were significant increased in O. nilotica and Erythrocyte count (RBCs) and Packed cell volume (PCV) were significantly decreased as increased dietary protein levels.

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This work was carried out to study the effect of two levels of protein (25&35%) and two levels of lipid (8 &16%) on the growth performance and some blood constituent of tilapia fish (Oreochromis niloticus and Oreochromis aureus). A 70-day feeding trial was conducted in hapa with tilapia fish, (0. niloticus and O. aureus), with an average initial weight of 50.31±1.92g and 41.14±1.15g, respectively, to examine the effect of two protein levels and two fat levels on growth performance and some blood constituents. Twelve hapa (2.0 xl.0x 1.0 m, each) were stocked with 10 fish and fed diets containing either 25% or 35% crude protein at crude fat of 8% or 16% (2 x2 factorial experiment). The results revealed that there was a significant increase in the final body weight and weight gain of O. niloticus and O. aureus with increasing dietary protein and lipid levels. However, feeding diet containing 35% protein + lipid 16% resulted in significantly higher final body weight and weight gain for O. nilotica and O. aurea. Feed conversion ratio of O. niloticus was improved significantly by increase dietary protein level, while feed conversion ratio of O. aureus was non significant difference by both dietary protein and fat levels. The best feed conversion ratio was obtained in both fish species by diet containing35% crude protein + 16% fat. Gonadosomatic index was significantly higher by increased protein and fat levels. The higher gonadosomatic index was observed when diet containing 35% protein + 16 fat to female and male of both fish species (0. nilotica and O. aurea). Hemoglobin (Hb), Mean corpuscular hemoglobin (MCH) and Mean corpuscular hemoglobin concentration (MCHC) were significant increased in O. nilotica and Erythrocyte count (RBCs) and Packed cell volume (PCV) were significantly decreased as increased dietary protein levels.

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