Data for maternal masses near parturition.
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This file contains the data used for models of maternal mass near parturition and contains the following columns: Mass (kg), momAGE.c (maternal ages in years at weighing, centered using the mean), momAGE.c.sq (the square of the previous term), momAGE.log (the log transform of maternal age in years, made by subtracting the minimum age from each animal and adding a small constant), PrevState (breeding state the previous season), NPrevPup.c (the number of previous pups for each mother, scaled by the average number of pups at each age), Season (year of measurement).
本文件包含用于临产期母体体重建模的数据集,其包含以下列字段: 1. 体重(Mass),单位为千克 2. 校正母龄(momAGE.c),即称重时的母兽年龄(以年为单位),经均值中心化处理 3. 校正母龄平方项(momAGE.c.sq),即上述校正母龄的平方值 4. 对数变换母龄(momAGE.log),对母兽年龄(年)进行的对数变换处理,具体操作为将每只个体的年龄减去最小年龄后再加一个小常数再执行对数转换 5. 前一季繁殖状态(PrevState),即上一季的繁殖状态 6. 标准化前胎仔数(NPrevPup.c),每只母兽的既往产仔数,按各年龄组的平均产仔数进行标准化缩放 7. 测量年份(Season),即数据采集的年份



