当前位置: X-MOL 学术Curr. Zool. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Relationships between personality traits and the physiological stress response in a wild mammal
Current Zoology ( IF 2.2 ) Pub Date : 2019-08-16 , DOI: 10.1093/cz/zoz040
Francesca Santicchia 1 , Lucas A Wauters 1, 2 , Ben Dantzer 3, 4 , Sarah E Westrick 3 , Nicola Ferrari 5, 6 , Claudia Romeo 5 , Rupert Palme 7 , Damiano G Preatoni 1 , Adriano Martinoli 1
Affiliation  

Abstract Glucocorticoids (GCs) are involved in the regulation of an animal’s energetic state. Under stressful situations, they are part of the neuroendocrine response to cope with environmental challenges. Animals react to aversive stimuli also through behavioral responses, defined as coping styles. Both in captive and wild populations, individuals differ in their behavior along a proactive–reactive continuum. Proactive animals exhibit a bold, active-explorative and social personality, whereas reactive ones are shy, less active-explorative and less social. Here, we test the hypothesis that personality traits and physiological responses to stressors covary, with more proactive individuals having a less pronounced GC stress response. In wild populations of invasive gray squirrels Sciurus carolinensis, we measured fecal glucocorticoid metabolites (FGMs), an integrated measure of circulating GCs, and 3 personality traits (activity, sociability, and exploration) derived from open field test (OFT) and mirror image stimulation (MIS) test. Gray squirrels had higher FGMs in Autumn than in Winter and males with scrotal testes had higher FGMs than nonbreeding males. Personality varied with body mass and population density. Squirrels expressed more activity-exploration at higher than at lower density and heavier squirrels had higher scores for activity-exploration than animals that weighed less. Variation in FGM concentrations was not correlated with the expression of the 3 personality traits. Hence, our results do not support a strong association between the behavioral and physiological stress responses but show that in wild populations, where animals experience varying environmental conditions, the GC endocrine response and the expression of personality are uncorrelated traits among individuals.

中文翻译:

野生哺乳动物人格特征与生理应激反应的关系

摘要 糖皮质激素(GCs)参与调节动物的能量状态。在压力情况下,它们是应对环境挑战的神经内分泌反应的一部分。动物也通过行为反应对厌恶刺激做出反应,定义为应对方式。在圈养和野生种群中,个体在主动-反应连续体中的行为不同。积极主动的动物表现出大胆、积极探索和社交的个性,而反应性动物则害羞、不那么积极探索和社交。在这里,我们测试了人格特征和对压力源的生理反应共变的假设,更积极主动的个体具有不那么明显的 GC 压力反应。在入侵的灰松鼠 Sciurus carolinensis 的野生种群中,我们测量了粪便糖皮质激素代谢物 (FGM)、循环 GC 的综合测量值,以及源自开放场测试 (OFT) 和镜像刺激 (MIS) 测试的 3 个人格特征(活动、社交和探索)。灰松鼠秋季的 FGM 高于冬季,而有阴囊睾丸的雄性的 FGM 高于非繁殖雄性。个性因体重和人口密度而异。松鼠在较高密度下比在较低密度下表现出更多的活动探索,而较重的松鼠在活动探索方面的得分高于体重较轻的动物。FGM 浓度的变化与 3 种人格特征的表达无关。因此,我们的结果不支持行为和生理应激反应之间的强烈关联,但表明在野生种群中,
更新日期:2019-08-16
down
wechat
bug