A major myna problem; invasive predator removal benefits female survival and population growth of a translocated island endemic
A major myna problem; invasive predator removal benefits female survival and population growth of a translocated island endemic
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八哥的主要问题；
DOI：
10.1101/2023.04.22.537650
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Brown T
中科院分区：
文献类型：
--
作者：
Brown T
入侵性捕食者是灭绝的主要驱动力，并继续威胁着世界各地的土著人口。岛上消灭（主要是哺乳动物）入侵的食肉动物，促进了许多岛屿地方性种群的重建。其他入侵物种，如一些食肉鸟类，可能会构成更持久的威胁，因为它们能够飞行，甚至能够主动重新入侵偏远和孤立的岛屿。然而，入侵性掠食性鸟类的影响在很大程度上被忽视了。我们报告一种新的性别特异性的影响，入侵巢捕食者，常见的八哥（Acridotheres tristis），重新引入人口的塞舌尔莺（Acrocephalus sechellensis）; 2004年从库桑岛转移到丹尼斯岛。定期的易位后监测显示，女性死亡率比男性高20%，导致2005年至2015年期间60- 70%的男性偏向人口性别比。这是由于普通的八哥在试图捕食巢中的蛋时对孵化中的雌性塞舌尔莺造成严重伤害。这些影响可能导致在同一时期观察到的人口增长低于预期（相对于以前塞舌尔莺迁移到其他岛屿）。2011年开始的一项根除计划到2015年将丹尼斯的所有普通八哥都清除了。随后，我们观察到的性别特异性生存和塞舌尔莺的人口性别比的平衡，因此，加速人口增长。这项研究表明了评估所有入侵类群（不仅仅是哺乳动物）对岛屿保护构成的威胁的重要性。此外，我们展示了如何扩展监测需要识别问题，并制定解决方案，后易位。
Invasive predators are a major driver of extinctions and continue to threaten native populations worldwide. Island eradications of (mostly mammalian) invasive predators have facilitated the reestablishment of numerous island-endemic populations. Other invasive taxa, such as some predatory birds, could pose a more persistent threat due to their ability to fly and actively re-invade even remote and isolated islands. However, the impact of invasive predatory birds has been largely overlooked. We report on a novel sex-specific impact of an invasive-nest predator, the common myna (Acridotheres tristis), on a reintroduced population of Seychelles warblers (Acrocephalus sechellensis); translocated from Cousin Island to Denis Island in 2004. Regular post-translocation monitoring revealed that female mortality was 20 % higher than males, leading to a 60–70 % male-biased population sex-ratio between 2005 and 2015. This was attributed to common mynas inflicting severe injuries to incubating female Seychelles warblers while attempting to prey upon eggs in their nests. These effects likely contributed to the slower-than-expected population growth observed (relative to previous translocations of Seychelles warblers to other islands) over the same period. An eradication programme beginning in 2011 removed all common mynas from Denis by 2015. Subsequently, we observed a balancing of sex-specific survival and the population sex-ratio of Seychelles warblers and, consequently, accelerated population growth. This study demonstrates the importance of assessing the threat posed by all invasive taxa (not just mammals) to island conservation. Furthermore, we show how extended monitoring is needed to identify problems, and develop solutions, post-translocation.
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交配系统和重叠世代对有效种群规模的影响
影响因子：
3.3
作者：
L. Nunney
通讯作者：
L. Nunney
控制性别比例以进行保护：短期风险和长期收益
DOI：
--
发表时间：
2002
期刊：
影响因子：
--
作者：
Claus Wedekind
通讯作者：
Claus Wedekind
影响因子：
2.1
作者：
J. Komdeur
通讯作者：
J. Komdeur
红额长尾小鹦鹉 (Cyanoramphus novaezelandiae) 幼雏后从大陆围栏保护区中扩散
影响因子：
3.1
作者：
E. Irwin;K. Kikillus;R. Gray;R. Empson;N. Nelson
通讯作者：
N. Nelson
影响因子：
4.6
作者：
Evans, Thomas;Kumschick, Sabrina;Blackburn, Tim M.
通讯作者：
Blackburn, Tim M.