| Titles |
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English :
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Physiological bases for sex differences in body weight of chicken and quail
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Arabic :
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الاسس الفسيولوجية للاختلافات الجنسية في وزن جسم الدجاج و السمان
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| Abstract |
Two experiments were conducted using Japanese quail for the first experiment and local chicken strain Golden-Montazah (GM) for the second one to evaluate the physiological and hematological variations and develop physiological marker(s) for detecting the difference(s) between and within sexes with reference to their body weights. In the first experiment, Japanese quail was selected for heavy (H) and light (L) live body weight (LBW) at 4-wk of age along three generations Go, G1 and G2 Live body weight (LBW), body weight gain (BWG), hatchability % and mortality rate were recorded. The level of hematocrit (Ht) and some blood serum constituents: total protein (STP), calcium (Ca), phosphorus (P), creatin phosphokinase (CPK), lactate dehydrogenase (LDH) and triiodothyronine hormone (T 3) were determined for each sex within each line and generation.Results show that average LBW and BWG for females were significantly (P<0.0l) higher than that for males and heavy line chicks (HL) exhibited the highest LBW and BWG while light line chicks (LL) were the lowest during the period form 1 to 42 DOA. Hatchability for HL (HM.HF) was 77.95% while for LL (LM.LF) was 67.52%.High line chicks recorded the lowest mortality rate compared to LL chicks. Males showed significant (P<0.0l) increase in Ht than those of females at six WOA.The increase in LBW of female was associated significantly (P<0.0l) with increase in TP, Ca, P, T3 and LDH and insignificantly increased in CPK. .
- In the second experiment, Golden Montazah chicks were selected for heavy (H) and light (L) live body weight (LBW) at
4-WOA. At 4 and 12 WOA all traits that were determined for the first experiment were done for the second experiment. Results show that average LBW and BWG for males were significantly (P<0.0l) higher than that of females The heavy line chicks (HL) exhibited the heaviest LBW and BWG while light line chicks (LL) were the lowest during the period from 4 to 12 WOA. The increase in body weight (LBW) was associated with increase in plasma Tp, Ca, P, T3 levels and LDH activity but with a decrease in CPK activity.
Key Words: Japanese quail, local strains, sex differences, body weight, weight gain, total protein, calcium. phosphorus, Ht, T3.
CPK, LDB.
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| Publication year |
2004
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| Pages |
92p.
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| Availability location |
مكتبة معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
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| Availability number |
904
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| Organization Name |
Animal Production Research Institute (APRI)
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| Country |
Egypt
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| Department |
Poultry Breeding Research Department
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - Reproduction
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AGROVOC
TERMS |
Body weight.
Calcium.
Chickens.
Phosphorus.
Proteins.
Quails.
Sex.
Trichothecenes.
Weight gain.
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| Publication Type |
PhD Thesis
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