Data and Code Associated with Sauve et al. Evol Letters

Included is the dataset used to measure selection gradients for mass and wing length across the ontogeny of nestling black-legged kittiwakes on Middleton Island, Alaska. <br> Each .csv file includes the following variables for age specific observations of nestling black-legged kittiwakes. The number after ALL indicates the age observations were taken and a number 1 following the age is the dataset that includes environmental predictors. For example hatching masses are all included in the ALL0.csv and age 5 masses are all included in the ALL5.csv. ALL01 is the file that includes environmental predictors for survival from age 0 days (hatching) to age 5 days. ALL051 would be the file that includes environmental predictors of survival from age 5 days to age 10 days. <br> <br> - Year: indicates the year of measurement - Treatment: indicates the food supplementation treatment of the nestling observations were recorded for. fed equals food supplemented and unfed equals non-food supplemented. - Rank: indicates that hatching rank of the nestling. a equals first hatched and b indicates second-hatched - Age: indicates the age of mass and wing-length measurement - Weight: The mass measurement in grams - Wing: The wing length measurement of a nestling in millimeters - Date: indicates the calendar date for the measurements - GrowRefDate: indicates the date 40 days after the hatching date - Surv0: indicates whether or not the nestling survived to the next age category. 0 indicates death and 1 indicates survival -Weight2: The mass of the nestling mean centered and scaled to units of standard deviation - Wing 2: The wing length of the nestling mean centered and scaled to units of standard deviation <br> CSV files ending in 1 include environmental data - pdo1: Pacific decadal oscillation during the current breeding season - pdo2: Pacific decadal oscillation from two years prior to the breeding season - AirWin: Minimum air temperature during the breeding season in degrees celsius -SSTWin: Average sea-surface temperature during the breeding season <br> See the below references for details on the environmental variables <br> Sauve, D., Charmantier, A., Hatch, S. A., &amp; Friesen, V. L. (2022).Environmental conditions variably affect growth across the breeding season in a subarctic seabird. Oecologia, 198, 307–318 <br> Whelan, S., Hatch, S. A., Gaston, A. J., Gilchrist, H. G., &amp; Elliott, K. H. (2022). Opposite, but insufficient, phenological responses to climate in two circumpolar seabirds: Relative roles of phenotypic plasticity and selection. Functional Ecology, 36,1782–1795. <br> The RMarkdown file includes code to run the models of selection in the manuscript. <br>

本数据集用于衡量阿拉斯加州米德尔顿岛黑腿三趾鸥雏鸟个体发育过程中体重与翼长的选择梯度。<br>每个.csv文件均包含针对黑腿三趾鸥雏鸟的年龄特异性观测数据，相关变量如下。文件名中ALL后的数字代表观测时的雏鸟日龄；若年龄后缀带有数字1，则该数据集包含环境预测因子。例如，出雏体重数据均收录于ALL0.csv中，5日龄体重数据则收录于ALL5.csv。ALL01文件包含雏鸟从0日龄（出雏）至5日龄的存活相关环境预测因子；ALL051则包含雏鸟从5日龄至10日龄的存活相关环境预测因子。<br><br>- 年份（Year）：代表测量开展的年份<br>- 处理组（Treatment）：代表该雏鸟观测对应的食物补充处理组别，fed代表食物补充组，unfed代表非食物补充组<br>- 孵化顺位（Rank）：代表雏鸟的孵化顺位，a代表第一只出雏个体，b代表第二只出雏个体<br>- 日龄（Age）：代表体重与翼长测量时的雏鸟日龄<br>- 体重（Weight）：以克为单位的体重测量值<br>- 翼长（Wing）：雏鸟翼长测量值，单位为毫米<br>- 观测日期（Date）：代表测量进行的公历日期<br>- 孵化后40日参考日期（GrowRefDate）：代表出雏日期后40天的日期<br>- 存活状态（Surv0）：代表雏鸟是否存活至下一个年龄分类，0代表死亡，1代表存活<br>- 标准化体重（Weight2）：经均值中心化并以标准差为单位进行标准化后的雏鸟体重<br>- 标准化翼长（Wing 2）：经均值中心化并以标准差为单位进行标准化后的雏鸟翼长<br><br>文件名后缀为1的CSV文件包含环境数据，具体变量如下：<br>- pdo1：当前繁殖季的太平洋年代际振荡（Pacific Decadal Oscillation, PDO）<br>- pdo2：繁殖季前两年的太平洋年代际振荡<br>- AirWin：繁殖季最低气温，单位为摄氏度<br>- SSTWin：繁殖季平均海表温度<br><br>相关环境变量的详细信息可参阅以下文献：<br>Sauve, D., Charmantier, A., Hatch, S. A., & Friesen, V. L. (2022). 环境条件对亚北极海鸟繁殖季内的生长具有可变影响. Oecologia, 198, 307–318<br>Whelan, S., Hatch, S. A., Gaston, A. J., Gilchrist, H. G., & Elliott, K. H. (2022). 两种环极地海鸟对气候的物候响应方向相反但效应不足：表型可塑性与选择的相对作用. Functional Ecology, 36, 1782–1795.<br><br>本数据集附带的RMarkdown文件包含运行本文手稿中选择模型的代码。