Statistical Estimation of Surface Heat Control and Exchange in Endotherms

• 作者: Barbara Henning Benilton de Sá Carvalho Denis Otávio Vieira de Andrade José Luiz Boldrini Sérgio Furtado dos Reis
• 来源期刊: 统计学期刊(英文)
• 学科: 医学
• 关键词: Gracilinanus microtarsus Infrared THERMOGRAPHY Thermal WINDOW THERMOREGULATION in Homeothermic Endotherms VASOMOTOR Adjustment
• 年，卷（期）: 2018,（1）
• 页码范围: 220-239
• 页数: 20页
• 分类号: R73

摘要

In this paper, we combine polynomial functions, Generalized Estimating Equations, and bootstrap-based model selection to test for signatures of linear or nonlinear relationships between body surface temperature and ambient temperature in endotherms. Linearity or nonlinearity is associated with the absence or presence of cutaneous vasodilation and vasoconstriction, respectively. We obtained experimental data on body surface temperature variation from a mammalian model organism as a function of ambient temperature using infrared thermal imaging. The statistical framework of model estimation and selection successfully detected linear and nonlinear relationships between body surface temperature and ambient temperature for different body regions of the model organism. These results demonstrate that our statistical approach is instrumental to assess the complexity of thermoregulation in endotherms.