Effects of confinement duration and parity on stereotypic behavioral and physiological responses of pregnant sows
Effects of confinement duration and parity on stereotypic behavioral and physiological responses of pregnant sows
复制标题
坐月时间和胎次对妊娠母猪刻板行为和生理反应的影响
DOI：
10.1016/j.physbeh.2017.07.015
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发表时间：
2017-10-01
影响因子：
2.9
通讯作者：
Bao, Jun
中科院分区：
文献类型：
--
作者：
Zhang, Ming-yue;Li, Xiang;Bao, Jun
本研究旨在评价空间限制应激对不同胎次母猪刻板行为和生理反应的影响，了解空间限制应激对受限条件下母猪福利的影响是必要的。我们选择了50头初产和第一胎至第五胎的怀孕母猪（大白母猪），它们在一个封闭的农场中具有相同的身体状况和预产期（3 +/- 1.5天）。在整个孕期进行空间坐月子的行为观察和生理分析。结果表明：初产母猪真空咀嚼、咬条、咬槽及血清IL-6浓度在初产期（0 ~ 8 d）无显著变化。随着坐月子时间的延长，各组母猪血清皮质醇、IgA、IL-6浓度和真空咀嚼频率均显著升高，除一胎和二胎外，血清c反应蛋白和猪- map浓度均显著升高。在整个限饲期内，老龄母猪的血清皮质醇、IgA、IL-6浓度和真空咀嚼频率均显著高于幼母猪，而初产后备母猪的血清c反应蛋白浓度显著高于其他各组。所有胎次母猪入产床后血清皮质醇、IgA、IL-6浓度及咬条、咬槽频率均显著降低。综上所述，长期和反复出现的环境约束会显著增加母猪的刻板行为频率和严重的心理和生理应激，严重损害母猪的福利。
The aim of this study was to evaluate the effects of space restriction stress on the stereotypic behavioral and physiological responses of different parity sows, and it is necessary to understand such effects due to space restriction to improve the welfare of the sows in confined conditions. We selected fifty pregnant sows (Large White) at primiparity and first to fifth parity in a confined farm with the same body condition and due date (3 +/- 1.5 days). Behavioral observations and physiological analysis were carried out during spatial confinement throughout pregnancy. The results showed that there were no significant changes in vacuum-chewing, bar biting, trough-biting and the concentrations of serum IL-6 in primiparous sows during the initial confinement (0-8 days). With the increase of the confinement duration, the serum cortisol, IgA, IL-6 concentrations and the vacuum-chewing frequency of sows in all groups increased significantly, and the serum concentrations of C-reactive protein and Pig-MAP increased significantly except for the sows in the first and second parity groups. The serum cortisol, IgA, IL-6 concentrations and the vacuum-chewing frequency of older sows were significantly higher than those of the young sows throughout the entire restricted feeding period, but the serum C-reactive protein concentrations of primiparous gilts was significantly higher than those of the other groups. The serum cortisol, IgA, IL-6 concentrations and bar-biting and trough-biting frequencies of all parity sows decreased significantly after entering the delivery bed. In conclusion, long-lasting and recurrent environmental constraints can significantly increase the frequency of stereotypical behavior and serious psychological and physical stress, seriously damaging sow welfare.