Relationships of neonatal plasma oxytocin with the behavioral characteristics of cattle introduced into a novel environment
Relationships of neonatal plasma oxytocin with the behavioral characteristics of cattle introduced into a novel environment
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新生儿血浆催产素与引入新环境的牛行为特征的关系
DOI：
10.1111/asj.12151
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发表时间：
2014
影响因子：
2
通讯作者：
Yamamoto N
中科院分区：
文献类型：
--
作者：
Yayou K;Ito S;Yamamoto N
为了研究产后催产素（OXT）对行为发育的影响，我们研究了基础OXT的个体差异和哺乳诱导的OXT变化，以及它们与发育过程中情绪特征的关系。在1 （wk1）、2 （wk2）和6周龄（wk6）时测量20头荷斯坦小母牛的血氧饱和度。分析了在第2周和第2个月的露天试验中，OXT变量与主成分得分的关系，以及第一次人工授精和机器挤奶时的退缩、踏步和踢腿反应次数。基础OXT呈现个体差异，且显著相关（wk1 vs. wk2:r= 0.753，P< 0.001; wk1 vs. wk6:r= 0.499，P< 0.05; wk2 vs. wk6:r= 0.476，P< 0.05）。在wk2的野外测试中，以逃避新环境形式反映反应的人格特征与wk1和wk2的基础OXT呈负相关（rs= - 0.640，P< 0.01）， rs= - 0.447，P< 0.05)。然而，2个月后的行为变量均与OXT无关。这些发现表明，出生后的OXT可能只在生命的早期阶段与新环境中的行为特征有关。
To examine the influence of postnatal oxytocin (OXT) on behavioral development, we examined individual variations in basal OXT and suckling‐induced changes in OXT, and their relationship with emotional traits during development. Blood OXT were measured in 20 Holstein heifer calves at 1 (wk1), 2 (wk2), and 6 weeks of age (wk6). The relationships of OXT variables with principal component scores in the open‐field tests at wk2 and 2 months and the number of flinch, step and kick responses during first artificial insemination and machine milking were analyzed. The basal OXT showed individual variability and significantly correlated (wk1 vs. wk2:r= 0.753,P< 0.001; wk1 vs. wk6:r= 0.499,P< 0.05; wk2 vs. wk6:r= 0.476,P< 0.05). The personality traits reflecting a response in the form of escape from novel environments in the open‐field test at wk2 were inversely correlated with basal OXT at wk1 (rs= −0.640,P< 0.01) and wk2 (rs= −0.447,P< 0.05). However, none of the behavioral variables after 2 months correlated with OXT. These findings suggest that, postnatal OXT might be related to behavioral characteristics in novel environments only during the early stages of life.