Huntable UK waterbird data

Life history characteristics, harvest data, population trends and conservation statuses of huntable waterbirds in the UK. Wintering bird populations for the UK were obtained from the latest published estimates (Frost et al. 2019). The estimate for mallard was increased by 2.6 million birds to account for the annual release of captive-raised birds for shooting purposes (Madden 2021). We estimated a standard deviation for the population estimates by averaging the Wetland Bird Survey (WeBS; Frost et al. 2021) index for each species for the winters 2012/13 – 2016/17, which corresponded to the period used to estimate duck populations. We treated this mean index as equal to the estimate from Frost et al. (2019) and then calculated population estimates for each year based on their WeBS indices and calculated the standard deviation of these estimates. Population estimates for greylag goose, pink-footed goose, golden plover, snipe and woodcock were based on single years, but the same time frame ...英国可狩猎水鸟的生活史特征、狩猎数据、种群动态与保护现状。 英国越冬鸟类种群数据源自最新已发表的估算结果（Frost等人，2019）。针对绿头鸭（mallard）的种群估算值上调了260万只，以涵盖每年为狩猎目的人工繁育个体的放归活动（Madden，2021）。我们通过对2012/13至2016/17年冬季各物种种群的湿地鸟类调查（Wetland Bird Survey，简称WeBS；Frost等人，2021）指数取平均值，来计算种群估算值的标准差，该时段与鸭类种群估算的时间范围一致。我们将该平均指数视作Frost等人（2019）的种群估算值，随后基于各物种种群的WeBS指数计算各年度的种群估算值，并求得这些估算值的标准差。灰雁（greylag goose）、粉脚雁（pink-footed goose）、金斑鸻（golden plover）、扇尾沙锥（snipe）以及丘鹬（woodcock）的种群估算值基于单一年份的数据，但采用了相同的时间框架……