| Titles |
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English :
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Effect of seasonal variations on adaptability of goats under Egyptian environmental conditions
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| Abstract |
The experiment was carried out on 18 kids in winter (November - January) and 12 kids in summer (June - August). Does were divided into three groups according to their physiological status i.e. dry, pregnant (during the last third of pregnancy) and lactating (2-3 weeks after kidding) does comprising 9, 8 and 6 does in winter and 10, 8 and 4 does in summer, respectively. Ambient temperature (AT), black body temperature (BBT) and relative humidity (RH) were recorded with measuring physiological responses. The following physiological parameters were measured: Rectal (RT), Ear (ET) and skin (ST) temperatures, temperature gradients, respiration rate (RR), pulse rate, hematocrit value (Ht%), plasma volume (PV), blood volume (BV), plasma total proteins (TP), plasma albumin (A1), plasma globulin (G1), A/G ratio, plasma Na+, K+ concentrations and plasma aldosterone level were measured.
Results obtained indicated that:
Kids had significantly higher RT, ST, ET, RR and PR and lower temperature gradients in summer than in winter. Chronic increase in AT during summer increased significantly PV% and BV% due to a significant increase in colloid osmotic pressure (A1 and A/G ratio), while G1 decreased significantly, the result was an insignificant' increase in TP. No significant seasonal changes were found in TP, aldosterone, Na+ and K+. However, plasma Na+ and K+ tended to be lower in summer than in winter which may be due to the increase in PV. Marketing weight was significantly higher in winter than in summer due to significantly higher total gain in winter. As a result, the marketing age was significantly higher in summer than in winter.
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| Publication year |
2000
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| Availability location |
معهد بحوث الانتاج الحيوانى-7 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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| City |
سيناء
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| serial title |
Conference of social and agricultural development of Sinia,(c11-16),11-16
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| Author(s) from ARC |
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| External authors (outside ARC) |
احمد عبد السلام الشربينى
جامعة الازهر
هشام محمد خليفة
جامعة الازهر
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| Agris Categories |
Animal physiology - Nutrition
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AGROVOC
TERMS |
Adaptability.
Egypt.
Environmental factors.
Goats.
Seasonal variation.
Summer.
Winter.
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| Publication Type |
Conference/Workshop
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