Incubation temperature in wood ducks

Data were collected from incubating wood duck hens nesting in nest boxes at the Savannah River Site in Aiken, SC, USA in Spring-Summer 2014. Two types of temperature loggers (6 mobile and 1 stationary) were installed into nest boxes to record egg temperature when hens were incubating. Both logger types were modified and inserted into artificial eggs filled with wire-pulling lubricant to mimic the thermal properties of real eggs. We also recorded ambient temperature within the nest box, and measured hen body mass and tarsus length. Averages and standard deviations in temperature were calculated for each nest from the entire incubation period (~30 d). Averages and standard deviations for the mobile loggers are averages of the 6 loggers in each nest. Logger type: M = mobile; ST = stationary. Clutch size includes all fake eggs (i.e., temperature loggers). All average incubation temperatures and standard deviations in temperature reflect a correction for slight differences between temperature recording devices. In three nests, one or two mobile loggers were pushed to the side of the nest either in the middle or end of incubation. 'Excluding pushed loggers' indicates that these pushed eggs were removed from the mean and standard deviation in temperature calculations for their respective nests.本数据集的采集对象为2014年春夏时节，美国南卡罗来纳州艾肯市萨凡纳河试验场（Savannah River Site）巢箱内孵卵的雌性林鸳鸯（wood duck）。研究人员布设两类温度记录仪：6台移动式与1台固定式，将其安装于巢箱中以记录雌鸳鸯孵卵期间的卵温。两类记录仪均经改装，被置入填充有穿线润滑剂（wire-pulling lubricant）的人工卵内，以模拟真实卵的热学特性。研究人员同时记录了巢箱内的环境温度，并测量了雌鸳鸯的体质量与跗跖长度。基于整个孵化周期（约30天）的全部记录数据，计算得到每个巢箱的温度平均值与标准差。移动式记录仪的平均值为对应巢箱内6台记录仪的平均结果。记录仪类型定义如下：M代表移动式记录仪，ST代表固定式记录仪。窝卵数（Clutch size）包含所有模拟卵（即温度记录仪）。所有平均孵化温度与温度标准差均经过校正，以消除不同温度记录仪间的细微差异。在3个巢箱中，有1台或2台移动式记录仪在孵化中期或末期被推至巢边。‘排除被推移记录仪’指在对应巢箱的温度均值与标准差计算中，移除了这些被推移的模拟卵数据。