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首页> 外文OA文献 >Use of individual colour-ringing to estimate annual survival in male and female Red Knot Calidris canutus islandica:a progress report for 1998–2001
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Use of individual colour-ringing to estimate annual survival in male and female Red Knot Calidris canutus islandica:a progress report for 1998–2001

机译：利用个体的颜色环估计雄性和雌性红结Calidris canutus islandica的年生存率：1998-2001年进度报告

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摘要

In relatively long-lived birds like shorebirds, even small changes in adult mortality may affect population size. However, annual survival estimates based on metal-ringing and accumulating recoveries by the general public take at least a decade to materialise. To try and obtain faster and more sensitive estimates of annual survival, we started an individual colour-ringing project on Red Knots Calidris canutus in 1998, focusing on the islandica-subspecies that spends part of the non-breeding season in the Dutch Wadden Sea. By using molecular sex determination techniques we were able to distinguish males and females. A total of 1805 birds was colour-marked in the study period from August 1998 to late 2001. Of these, 1603 were adult birds (52% were female, 39% male and 9% undetermined). Based on a total of 850 individual observations, 486 different adults were resighted at least once over this period. Using the software MARK, we estimated average annual survival in adult birds as 0.841 (SE = 0.066). Compared with previous studies this is a great improvement in the time over which a survival estimate can be obtained with such precision. No differences between sexes and years were apparent.
机译：在像shore鸟这样相对长寿的鸟类中，即使成年死亡率的微小变化也可能影响种群数量。但是，基于公众的金属振铃和累积回收率的年度生存估计至少需要十年才能实现。为了尝试更快，更敏感地估算出年生存率，我们于1998年在Red Knots Calidris canutus上启动了一个单独的彩色环项目，重点研究了在荷兰瓦登海度过非繁殖季节一部分的小岛亚种。通过使用分子性别确定技术，我们能够区分男性和女性。在1998年8月至2001年下半年的研究期间，共有1805羽鸟类带有颜色标记。其中，成年鸟类1603羽（雌性52％，雄性39％和不确定性9％）。根据总共850项个人观察，在此期间至少对486位不同的成年人进行了一次视力检查。使用MARK软件，我们估计成年鸟的平均年生存率为0.841（SE = 0.066）。与以前的研究相比，在以这种精度获得生存估计的时间上有了很大的改进。性别和年龄之间没有明显差异。

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