BTReactionNormAnalysis

Dataset contains blue tit (Cyanistes caeruleus) breeding and oak (Quercus) budburst phenology obtained from a wild population in southern UK, 2002-2019. Nest boxes were examined every year in the breeding season and data recorded include laying date, clutch size, female ID, and number of 7-day-old chicks in the brood. Oak budburst dates associated with a brood record were obtained from trees surrounding a nest box by summarizing the mean dates at which trees reach budburst stages 1(budburst) to 6(fully tanninized). All dates were recorded as April Days (0 = 1st Apr). Z-scores represent annually standardized values.<br>R script details statistical analyses to estimate among-individual variance in laying date-budburst reaction norm, and clutch size-laying date reaction norm, as well as selection pressures on these reaction norms.本数据集涵盖2002至2019年英国南部野生种群的蓝山雀（Cyanistes caeruleus）繁殖数据与栎属（Quercus）芽物候数据。每年繁殖季均对巢箱开展检查，记录的信息包括产卵日期、窝卵数、雌性个体标识以及每窝7日龄雏鸟的数量。与每窝雏鸟记录相关联的栎树芽爆日期，通过汇总巢箱周边树木达到芽爆阶段1（初始芽爆）至阶段6（单宁完全合成）的平均日期获取。所有日期均以四月日数记录（0代表4月1日），Z分数为年度标准化后的数值。<br>附带的R脚本详述了统计分析流程，用于估算产卵日期-芽爆反应规范的个体间方差、窝卵数-产卵日期反应规范，以及上述反应规范所承受的选择压力。