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首页> 外文期刊>Oryx >Movements of translocated captive-bred and released Critically Endangered kaki (black stilts) Himantopus novaezelandiae and the value of long-term post-release monitoring
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Movements of translocated captive-bred and released Critically Endangered kaki (black stilts) Himantopus novaezelandiae and the value of long-term post-release monitoring

机译：易位圈养和释放的极度濒危的亚洲柿（Himantopus novaezelandiae）的运动和长期释放后监测的价值

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摘要

Translocation outcomes for mobile species can be affected by post-release movement of individuals, yet few population reintroduction and supplementation projects consider propensity to move as a selection criterion when selecting individuals to release or sites for release. We investigate the influence of release age (juvenile or subadult), the size of the release group and the size of the wild population at the release site on movements of Critically Endangered kaki (black stilt) Himantopus novaezelandiae. Over 460 subadult and juvenile kaki have been released during 12 years at nine sites in the Waitaki Basin, New Zealand, with the aim of supplementing specific sub-populations. Among the survivors that reached breeding age, 32% of released kaki ended up away from their release sites, i.e. away from the subpopulations they were intended to augment and 15% of these birds were in unmanageable areas where monitoring cannot take place. Kaki released as juveniles (2-3 months) made more long moves and moved further from the release site during 2 months post-release. The presence of conspecifics affected behaviour after release: released birds were more likely to remain closer to the release site when the size of the wild population at the release site was large, and kaki released in larger groups were more likely to make more longer moves. Despite initial differences in mobility, long-term monitoring revealed equal proportions of 2-year old survivors that had been released as juveniles and subadults returning and being observed consistently at release sites, emphasizing the value of long-term monitoring in informing release strategies for population restorations.
机译：个体释放后的活动可能会影响流动物种的易位结果，但是很少有种群重新引入和补充项目在选择释放个体或释放场所时将迁移的倾向作为选择标准。我们调查了释放年龄（青少年或亚成年），释放群的大小以及释放地点野生种群的数量对极度濒危亚洲柿（黑高跷）Himantopus novaezelandiae运动的影响。在过去的12年中，在新西兰怀塔基盆地的9个地点释放了460多个亚成年和幼年亚基，以补充特定亚种群。在达到繁殖年龄的幸存者中，有32％的释放的柿子最终离开了释放点，即远离了他们打算繁殖的亚种群，而这些鸟中有15％处于无法监测的难以控制的区域。幼年（2-3个月）释放的柿木（Kaki）进行了更长的移动，并在释放后的2个月内离开了释放地点。特定物种的存在会影响释放后的行为：释放位置上的野生种群数量较大时，释放的鸟类更有可能停留在靠近释放位置的位置，成群释放的柿子更有可能做出更长的移动。尽管流动性存在最初的差异，但长期监测显示，随着少年和亚成年人返回并在释放地点被一致观察到的2岁幸存者的比例相同，强调了长期监测在告知人口释放策略中的价值修复体。

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