McManus Concepta, Paludo Giane Regina, Louvandini Helder, Gugel Rosilene, Sasaki Luiz Cláudio Bastos, Paiva Samuel Rezende
Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, Brasília, DF 70910-900, Brazil.
Trop Anim Health Prod. 2009 Jan;41(1):95-101. doi: 10.1007/s11250-008-9162-1. Epub 2008 Apr 9.
Thirty Santa Ines adult, non-lactating, non-pregnant ewes, ten with a brown coat, ten black coated and ten white coated, as well as ten Bergamasca and ten of mixed breed were used to evaluate the effect of climate on physiological and blood parameters in sheep. Two sample collections were taken (6 AM: and 2 PM: ) on six days. Sweating rate (SR), heart (HR) and breathing rates (BR), complete hemogram, rectal (RT) and skin temperatures (ST) were measured. Variance analyses were carried out using SAS(R). In general, there were significant differences between animals due to skin type, time and day of collection. White coated animals showed lower HR, BR and RT, with afternoon parameters higher than morning. Correlations between HR, BR, RT, SR and ST were medium and positive. Correlations between physiological and blood traits were in general negative and medium. Packed Cell Volume (PCV), total plasma proteins, red blood cell count and hemoglobin concentration had high positive correlations between each other. The first two autovectors explained 49% of variation between traits. White coated Santa Ines animals were shown to be better adapted to climatic conditions in Central Brazil and wool sheep more affected by heat.
选用30只成年、非泌乳、未怀孕的圣伊内斯母羊，其中10只棕色被毛、10只黑色被毛、10只白色被毛，以及10只贝加马斯卡羊和10只混种羊，用于评估气候对绵羊生理和血液参数的影响。在6天内进行了两次样本采集（上午6点和下午2点）。测量了出汗率（SR）、心率（HR）和呼吸率（BR）、全血细胞计数、直肠温度（RT）和皮肤温度（ST）。使用SAS(R)进行方差分析。总体而言，由于皮肤类型、采集时间和日期的不同，动物之间存在显著差异。白色被毛的动物心率、呼吸率和直肠温度较低，下午的参数高于上午。心率、呼吸率、直肠温度、出汗率和皮肤温度之间的相关性为中等正相关。生理和血液性状之间的相关性总体为中等负相关。红细胞压积（PCV）、总血浆蛋白、红细胞计数和血红蛋白浓度之间具有高度正相关。前两个特征向量解释了性状间49%的变异。结果表明，白色被毛的圣伊内斯羊更能适应巴西中部的气候条件，毛用绵羊受高温影响更大。
