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Validation of a noninvasive technique to quantify stress in northern bobwhite (Colinus virginianus).
Conservation Physiology ( IF 2.6 ) Pub Date : 2020-04-13 , DOI: 10.1093/conphys/coaa026
Jessica L Mohlman 1 , Kristen J Navara 2 , Michael J Sheriff 3 , Theron M Terhune 4 , James A Martin 1, 5
Affiliation  

Examination of the endocrine system through non-invasive fecal sampling may improve population management more than using demographic indicators alone. By addressing the physiological mechanisms that are influencing fitness, management actions can be proactively developed to alleviate stressors. Proactive determination of vulnerable populations is critical for species of concern, such as the Northern Bobwhite (Colinus virginianus), which have suffered decades of population decline. We validated an assay to noninvasively measure the adrenocortical response of captive reared bobwhite through fecal corticosterone metabolites (FCM). All individuals received three sequential 48-hour treatments in which samples were collected every 4 hours, including a reference period, an adrenocorticotropic hormone (ACTH) challenge and a biological stressor (exposure to a hunting dog). Reference FCM values had a mean concentration of 16.75 pg/mg (95% CrI: 13.68, 19.91) with adrenocortical activity increasing by 73% for the duration of the ACTH challenge (29.00 pg/mg; CrI: 25.01, 33.78). FCM concentrations remained similar to that of the reference levels during the biological stressor (16.56 pg/mg; CrI: 13.33, 19.92). Our study validates the use of feces to detect changes in FCM levels in our subject species but also demonstrates the complexity of FCM and the importance of both physiological and biological validation prior to field implementation.

中文翻译:

验证北部无脊椎动物(Colinus virginianus)的无创伤技术以量化压力。

通过非侵入性粪便采样检查内分泌系统可能比仅使用人口指标更能改善人口管理。通过解决影响健康的生理机制,可以积极制定管理措施以缓解压力源。主动确定脆弱人群对于令人关注的物种至关重要,例如遭受了数十年人口减少的北山茱white(Colinus virginianus)。我们验证了一种通过粪便皮质酮代谢物(FCM)进行无创测量饲养的鲍勃·怀特的肾上腺皮质反应的测定方法。所有个人都接受了三个连续的48小时治疗,其中每4小时(包括参考期)收集一次样本,促肾上腺皮质激素(ACTH)攻击和生物应激源(暴露于狩猎犬)。在ACTH攻击期间,参考FCM值的平均浓度为16.75 pg / mg(95%CrI:13.68,19.91),肾上腺皮质活性增加73%(29.00 pg / mg; CrI:25.01,33.78)。在生物应激期间,FCM浓度仍与参考水平相似(16.56 pg / mg; CrI:13.33,19.92)。我们的研究验证了粪便的使用,以检测主题物种中FCM水平的变化,但同时也证明了FCM的复杂性以及在现场实施之前进行生理和生物学验证的重要性。91)在ACTH激发期间(29.00 pg / mg; CrI:25.01,33.78)肾上腺皮质活性增加73%。在生物应激期间,FCM浓度仍与参考水平相似(16.56 pg / mg; CrI:13.33,19.92)。我们的研究验证了粪便的使用,以检测主题物种中FCM水平的变化,但同时也证明了FCM的复杂性以及在现场实施之前进行生理和生物学验证的重要性。91)在ACTH激发期间(29.00 pg / mg; CrI:25.01,33.78)肾上腺皮质活动增加73%。在生物应激期间,FCM浓度仍与参考水平相似(16.56 pg / mg; CrI:13.33,19.92)。我们的研究验证了粪便的使用,以检测主题物种中FCM水平的变化,但同时也证明了FCM的复杂性以及在田间实施之前进行生理和生物学验证的重要性。
更新日期:2020-04-17
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