Effects of stress on parental care are sexually dimorphic in prairie voles
Effects of stress on parental care are sexually dimorphic in prairie voles
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DOI：
10.1016/j.physbeh.2005.11.002
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发表时间：
2006-02-28
影响因子：
2.9
通讯作者：
Carter, CS
中科院分区：
文献类型：
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作者：
Bales, KL;Kramer, KM;Carter, CS
人们对压力对父母照顾的影响知之甚少，特别是在双亲物种中，雄性也表现出关心。之前对草原田鼠的研究数据，以及与配对结合行为的相似之处，表明了一种假设，即压力经历可能会促进雄性田鼠的父母照顾，但对雌性田鼠则不是。在本研究中，雄性和雌性草原田鼠被暴露在3分钟的游泳应激源或没有应激源的环境中；45分钟后，每只动物都在父母照顾的范例中进行测试。在父母关爱测试之后，采集血样并检测皮质酮(CORT)。在压力过后，雄性，而不是雌性，表现出显著的父母行为变化，包括明显更多的时间在后凸(弓背缩成一团)，以及花更多的时间舔和梳理幼崽。在男性中，在父母照顾测试后测量的皮质醇水平与舔和梳理呈负相关，而与取回呈正相关。这些发现支持了早期的研究，即父母行为的神经内分泌底物以及应激源的影响，在这种物种中是性别二态的。(C)2005 Elsevier Inc.保留所有权利。
The effects of stress on parental care are poorly understood, especially in biparental species where males also display care. Data from previous studies in prairie voles, as well as parallels with pair-bonding behavior, suggest the hypothesis that a stressful experience might facilitate parental care in males but not in females. In the present study, male and female prairie voles were exposed to either a 3-min swim stressor or no stressor; 45 min later each animal was tested in a parental care paradigm. Following the parental care test, blood samples were collected and assayed for corticosterone (CORT). After the stressor males, but not females, showed significant changes in parental behavior including significantly more time in kyphosis (arched-back huddling), and a tendency to spend more time licking and grooming pups. In males, CORT levels measured following the parental care test were inversely related to licking and grooming but positively correlated with retrievals. These findings support earlier studies suggesting that the neuroendocrine substrates of parental behavior, as well as the effects of stressors, are sexually dimorphic in this species. (c) 2005 Elsevier Inc. All rights reserved.