Distribution and Derivation Data

This zip file contains the raw data (reported direct recoveries, estimated recoveries, and estimated harvest) for each population for both adults and young. Within each spreadsheet the first tab shows the actual reported direct recoveries for each state and province within each year. Reward bands were used in 2004 and 2005 and are shown in the table. The second tab shows estimated recoveries calculated by adjusting the reported direct recoveries by a reporting rate. For all populations the reporting rate used came from Zimmerman et al. 2009. In the third tab in order to calculate the estimated harvest a weighting factor (the number of birds one banded bird represents) is needed. The weighting factor is calculated as the population estimate divided by the number of banded birds in a particular year. Estimated harvest is then calculated as the estimated recoveries multiplied by the weighting factor.本压缩包包含针对各成体与幼体种群的原始数据，涵盖报告直接回收数（reported direct recoveries）、估计回收数（estimated recoveries）与估计猎获量（estimated harvest）。 在每份电子表格中，首个工作表展示了各年度内各州、各省的实际报告直接回收数。2004年与2005年使用了奖励环志脚环（reward bands），相关数据已在表中列明。 第二个工作表展示了通过报告率（reporting rate）对报告直接回收数进行校正后计算得到的估计回收数。所有种群所采用的报告率均源自齐默尔曼（Zimmerman）等人2009年的研究。 第三个工作表中，为计算估计猎获量，需引入加权因子（weighting factor），即单只环志鸟类（banded bird）所代表的鸟类数量。该加权因子通过将种群估计量（population estimate）除以特定年度的环志鸟类总数得到。随后，估计猎获量可通过估计回收数与加权因子相乘计算得出。