Piccione G, Lutri L, Casella S, Ferrantelli V, Pennisi P
Dipartimento di Scienze Sperimentali e Biotecnologie Applicate, Facolta di Medicina Veterinaria, Università di Messina, 98168 Messina, Italy.
J Environ Biol. 2008 Nov;29(6):877-80.
The aim of this study was to establish the influence of shearing in dairy sheep during summer season. Several physiological and haematological parameters, which are closely related to thermoregulatory potential, have been investigated with the purpose to assess shearing influence on thermoregulation. Forty dairy sheep, clinically healthy and well-fed, were used. They were divided into two groups of 20 subjects each. Twenty sheep were let unshorn as a control group (Group A), and twenty sheep were shorn (Group B). On each subject of group A and Group B, rectal temperature, respiration and heart rates were recorded and blood samples were collected in order to asses the following parameters: red blood cells, white blood cells, platelets, haematocrit and haemoglobin. All measurements taken on day 0 (before shearing), were repeated after 1, 15, 30, 45 and 60 days after shearing. The statistical analysis, the ANOVA followed by the Bonferroni's test, showed statistical differences between two groups for rectal temperature (F(1.90) = 5.57, p < 0.0001), respiratory rate (F(1.90) = 18.40, p < 0. 0001) and white blood cells (F(1.190) = 7.61, p < 0.0001). These results suggest that the shearing induce adaptative responses in the organism.
本研究的目的是确定夏季剪毛对奶羊的影响。为了评估剪毛对体温调节的影响，研究了几个与体温调节潜力密切相关的生理和血液学参数。选用了40只临床健康且营养良好的奶羊。它们被分为两组，每组20只。20只羊不剪毛作为对照组（A组），另外20只羊剪毛（B组）。对A组和B组的每只羊记录直肠温度、呼吸频率和心率，并采集血样以评估以下参数：红细胞、白细胞、血小板、血细胞比容和血红蛋白。在剪毛前第0天进行的所有测量，在剪毛后1天、15天、30天、45天和60天重复进行。统计分析采用方差分析（ANOVA）并随后进行邦费罗尼检验，结果显示两组在直肠温度（F(1.90) = 5.57，p < 0.0001）、呼吸频率（F(1.90) = 18.40，p < 0.0001）和白细胞（F(1.190) = 7.61，p < 0.0001）方面存在统计学差异。这些结果表明，剪毛会诱发机体的适应性反应。
