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首页> 外文期刊>Tropical Animal Health and Production >Physiological and haematological indices suggest superior heat tolerance of white-coloured West African Dwarf sheep in the hot humid tropics
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Physiological and haematological indices suggest superior heat tolerance of white-coloured West African Dwarf sheep in the hot humid tropics

机译：生理和血液学指标表明，在炎热潮湿的热带地区，白色西非矮羊具有较高的耐热性

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摘要

Coat colour contributes to physiological adaptation in mammals and mediates response to thermal stress. Twenty-four adult West African Dwarf sheep of both sexes and with different coat colour types were used in this study. We measured rectal temperature (RT), respiratory rate (RR) and pulse rate (PR) before sunrise and sunset during the late dry season (January–March) and early rainy season (April–June) as well as packed cell volume (PCV), red blood cell (RBC) count, white blood cell (WBC) count, plasma sodium (Na+) and potassium (K+). Animals with black coat colour had the highest (P < 0.05) mean values of 38.92 ± 0.03 °C, 65.09 ± 1.06 breaths/min, 81.35 ± 0.78 beats/min, 1.70 ± 0.01 for RT, RR, PR and heat stress index (HSI), respectively, followed by brown mouflon and brown with extensive white, while the Badger Face coloured sheep had the least mean values. There were significant (P < 0.05) differences between male and female sheep for RT, RR, PR and HSI. Season had a significant (P < 0.05) effect on RT, RR, PR and HSI. Coat colour and sex also significantly (P < 0.01) affected RBC, WBC, Na+ and K+. Seasonal variation (P < 0.05) in all the blood parameters was observed, with the exception of PCV. Interaction effect of coat colour and sex was significant (P < 0.05) on RT and HSI. Correlation coefficients among the measured traits ranged from positive to negative values. These results indicate that selection of white-coloured sheep to attenuate heat stress is desirable in the hot humid tropics.
机译：毛色有助于哺乳动物的生理适应并介导对热应激的反应。在这项研究中使用了二十四只成年的西非矮人成年绵羊，它们的性别和外皮颜色类型都不同。我们测量了干燥后期（一月至三月）和雨季初（四月至六月）日出和日落前的直肠温度（RT），呼吸频率（RR）和脉搏频率（PR）以及细胞体积（PCV） ），红细胞（RBC）计数，白细胞（WBC）计数，血浆钠（Na + ）和钾（K + ）。黑色外套动物的平均值最高（P <0.05）平均值为38.92±0.03°C，65.09±1.06呼吸/分钟，81.35±0.78搏动/分钟，RT，RR，PR和热应激指数为1.70±0.01（ HSI），其次是棕色的穆福隆和棕色的白色，而Badger Face彩色绵羊的平均值最小。雄性和雌性绵羊在RT，RR，PR和HSI之间存在显着（P <0.05）差异。季节对RT，RR，PR和HSI有显着（P <0.05）影响。外套的颜色和性别也显着（P <0.01）影响RBC，WBC，Na + 和K + 。除PCV外，所有血液参数均出现季节性变化（P <0.05）。毛色和性别的相互作用对RT和HSI的影响显着（P <0.05）。被测性状之间的相关系数从正值到负值不等。这些结果表明，在炎热潮湿的热带地区，选择白色绵羊来减轻热应激是合乎需要的。

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  • 来源
    《Tropical Animal Health and Production》 |2012年第1期|157-165|共9页
  • 作者

    Adelodun O. Fadare; Sunday O. Peters; Abdulmojeed Yakubu; Adekayode O. Sonibare; Matthew A. Adeleke; Michael O. Ozoje; Ikhide G. Imumorin;

  • 作者单位

    Department of Animal Breeding and Genetics University of Agriculture Abeokuta P.M.B. 2240 Abeokuta Ogun State Nigeria;

    Department of Animal Breeding and Genetics University of Agriculture Abeokuta P.M.B. 2240 Abeokuta Ogun State Nigeria;

    Department of Animal Science Faculty of Agriculture Nasarawa State University Keffi Shabu-Lafia Campus P.M.B. 135 Lafia Nigeria;

    Department of Veterinary Medicine University of Agriculture Abeokuta P.M.B. 2240 Abeokuta Ogun State Nigeria;

    Department of Animal Breeding and Genetics University of Agriculture Abeokuta P.M.B. 2240 Abeokuta Ogun State Nigeria;

    Department of Animal Breeding and Genetics University of Agriculture Abeokuta P.M.B. 2240 Abeokuta Ogun State Nigeria;

    Department of Animal Science Cornell University 267 Morrison Hall Ithaca NY 14853 USA;

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  • 正文语种 eng
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  • 关键词

    Coat colour; Physiological parameters; Blood indices; Heat stress; Sheep; Nigeria;

    机译：毛色;生理参数;血液指数;热应激;绵羊;尼日利亚;

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