Fledging Success
收藏资源简介:
NestID: unique identifier for each nest Year: year Fledge: Total number of nestlings to leave the nest FledgeDate: Julian date nestlings left nest Hatch: Total number of eggs to hatch HatchDate: Julian date eggs hatched FailureCause2: cause of nest failure, listed either as NESTLINGS DIED, PREDATION, OTHER, COMPETITOR Daysabove18: number of days from hatching to day 8 (hatching=day 0) with maximum daily temperature above 18.5 degrees Celsius with no rain. A crude measurement of weather conditions during nestling development Year2: decades since 1975 TimePeriod: population trajectory at the time (growing, declining, post-decline)
NestID:每个鸟巢的唯一标识符 Year:研究年份 Fledge:成功离巢的雏鸟总数量 FledgeDate:雏鸟离巢的儒略日(Julian date) Hatch:成功孵化的卵总数量 HatchDate:卵孵化的儒略日 FailureCause2:巢失败原因,可选取值为「雏鸟死亡」「捕食」「其他」「竞争者干扰」 Daysabove18:以孵化当日为第0日,统计至第8日期间,每日最高气温超过18.5摄氏度且无降雨的天数,用于粗略表征雏鸟发育阶段的天气条件 Year2:距1975年的年代数 TimePeriod:对应时期的种群动态趋势,分为增长、衰退、衰退后三个阶段




