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Survival is negatively associated with glucocorticoids in a wild ungulate neonate
Integrative Zoology ( IF 3.5 ) Pub Date : 2020-11-09 , DOI: 10.1111/1749-4877.12499 Tess Michelle GINGERY 1 , Duane Richard DIEFENBACH 1, 2 , Catharine Elizabeth PRITCHARD 3 , David Charles ENSMINGER 3 , Bret Daniel WALLINGFORD 4 , Christopher Scott ROSENBERRY 4
Integrative Zoology ( IF 3.5 ) Pub Date : 2020-11-09 , DOI: 10.1111/1749-4877.12499 Tess Michelle GINGERY 1 , Duane Richard DIEFENBACH 1, 2 , Catharine Elizabeth PRITCHARD 3 , David Charles ENSMINGER 3 , Bret Daniel WALLINGFORD 4 , Christopher Scott ROSENBERRY 4
Affiliation
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It is unknown how ungulate physiological responses to environmental perturbation influence overall population demographics. Moreover, neonatal physiological responses remain poorly studied despite the importance of neonatal survival to population growth. Glucocorticoid (GC) hormones potentially facilitate critical physiological and behavioral responses to environmental perturbations. However, elevated GC concentrations over time may compromise body condition and indirectly reduce survival. We evaluated baseline salivary cortisol (CORT; a primary GC in mammals) concentrations in 19 wild neonatal white‐tailed deer (Odocoileus virginianus) in a northern (NS) and southern (SS) area in Pennsylvania. After ranking survival models consisting of variables hypothesized to influence neonate survival (i.e. weight, sex), the probability of neonate survival was best explained by CORT concentrations, where elevated CORT concentrations were associated with reduced survival probability to 12 weeks of age. Cortisol concentrations were greater in the SS where predation rates and predator densities were lower. As the first evaluation of baseline CORT concentrations in an ungulate neonate to our knowledge, this is also the first study to demonstrate CORT concentrations are negatively associated with ungulate survival at any life stage. Glucocorticoid hormones could provide a framework in which to better understand susceptibility to mortality in neonatal white‐tailed deer.
中文翻译：
存活与野生有蹄类新生儿的糖皮质激素呈负相关
尚不清楚有蹄类动物对环境干扰的生理反应如何影响总体人口统计。此外，尽管新生儿存活对人口增长很重要，但对新生儿生理反应的研究仍很少。糖皮质激素（GC）激素可能促进对环境扰动的关键生理和行为反应。但是，随着时间的推移，GC浓度升高可能会损害身体状况并间接降低生存率。我们评估了19只野生新生儿白尾鹿（Odocoileus virginianus）的基线唾液皮质醇（CORT；哺乳动物中的主要GC）浓度）位于宾夕法尼亚州的北部（NS）和南部（SS）地区。在对由假设影响新生儿存活率（即体重，性别）的变量组成的存活模型进行排名之后，新生儿存活的可能性最好用CORT浓度来解释，其中CORT浓度升高会降低到12周龄的存活率。SS中的皮质醇浓度较高，而捕食率和捕食者密度较低。据我们所知，作为有蹄类动物新生儿中基线CORT浓度的首次评估，这也是第一个证明CORT浓度与任何生命阶段的有蹄类动物存活率呈负相关的研究。糖皮质激素可以提供一个框架，以便更好地了解新生儿白尾鹿的死亡率敏感性。
更新日期：2020-11-09
中文翻译：
存活与野生有蹄类新生儿的糖皮质激素呈负相关
尚不清楚有蹄类动物对环境干扰的生理反应如何影响总体人口统计。此外，尽管新生儿存活对人口增长很重要，但对新生儿生理反应的研究仍很少。糖皮质激素（GC）激素可能促进对环境扰动的关键生理和行为反应。但是，随着时间的推移，GC浓度升高可能会损害身体状况并间接降低生存率。我们评估了19只野生新生儿白尾鹿（Odocoileus virginianus）的基线唾液皮质醇（CORT；哺乳动物中的主要GC）浓度）位于宾夕法尼亚州的北部（NS）和南部（SS）地区。在对由假设影响新生儿存活率（即体重，性别）的变量组成的存活模型进行排名之后，新生儿存活的可能性最好用CORT浓度来解释，其中CORT浓度升高会降低到12周龄的存活率。SS中的皮质醇浓度较高，而捕食率和捕食者密度较低。据我们所知，作为有蹄类动物新生儿中基线CORT浓度的首次评估，这也是第一个证明CORT浓度与任何生命阶段的有蹄类动物存活率呈负相关的研究。糖皮质激素可以提供一个框架，以便更好地了解新生儿白尾鹿的死亡率敏感性。
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