| Titles |
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English :
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Effect of stocking density on Mugill fish (Mugill cephalus) performance under different Azolla meal
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Arabic :
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تأثير كثافة التخزين على اداء اسماك البورى تحت مستويات مختلفة من الازولا
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| Abstract |
Two feeding trials were conducted at Wady EI-Narroun El- Behera Covernorate,Egypt to determine the effect of feeding Azolla primata meal as partial replacement of the toral protein in Mugill cephalus diets. Fish with average initial body weight of approximately 71.55g were randomly allocated to four dietary treatments at two srocking densities (1000 fish/pond and 1500 fish /pond), two replicates per treatment. Dietary treatments were control diet without Azolla meal, diet with 10%, Azolla meal, control diet with 20% Azolla meal and control diet with 30%, Azalia meal as replacements from total protein diers, Fishes were fed pellered compounded feed 32 % CP and 4439 kcal gross energy/Kg DM of diet ) twice daily at ratio 3% of their weights during rhe expermental period (120 days) and the fishes were slaughtered for carcass evaluation at the end of the experimental period, The results revealed that, water pH and temperature were not significantly different among experimenral groups whereas, lowest values of NH3 concentration were observed with control and 20% Azolla diet. The highest dissolved oxygen was observed with inclusion of Azolla meal in diets at the first stocking density (1000 fish/pond) and with 20 and 30% Azolla inclusion dier at the second stocking density (l500 fish/pond), Avcrage daily gain and specific growth rate (SGR) were signitkantly improved with 20% Azolla meat at the two densities. Condition factor (CF) was significantly (P<0.05) lowest in the diet with 20% Azolla meal at the second density (1500 fish/pond) but the difference was insignificant at the first (1000 fish/pond) density, Daily feed intake (DFI) and feed conversion ratio (FCR) of fishes at the two densities were nor significantly different among experimental gruups.
The edible parts (%), nonedible parts (%) and fillet dressing (%) Were similar for all treatments in two densities,
Keywords: Azolla meal, Mugill fish, stocking density, growth perormance,water quality.
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| Publication year |
2007
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| Pages |
325-334
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| Availability location |
معهد بحوث الانتاج الحيوانى- شار ع 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 Journal Nutrition and Feeds
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| Author(s) from ARC |
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| Agris Categories |
Fisheries production
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AGROVOC
TERMS |
Performance testing.
Stocking density.
Water quality.
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| Proposed Agrovoc |
Mugill fish;Azolla meal;
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| Publication Type |
Journal
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