Demographic composition, post-release and natal dispersal, and breeding success of the reintroduced Oriental Stork Ciconia boyciana
Demographic composition, post-release and natal dispersal, and breeding success of the reintroduced Oriental Stork Ciconia boyciana
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DOI：
10.1017/s0959270922000016
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发表时间：
2022-06
影响因子：
1.6
通讯作者：
T. Deguchi;Yoshito Ohsako;Shiro Sagawa;Y. Ezaki
中科院分区：
文献类型：
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作者：
T. Deguchi;Yoshito Ohsako;Shiro Sagawa;Y. Ezaki
摘要通过重新引入和加强物种恢复被广泛认为是保护受威胁动物的有效方法。尽管在过去的半个世纪里，这些方法得到了越来越多的实施，但许多尝试都失败了。扩散行为是决定再引入成功的关键因素之一。我们报告了人口组成和分布模式（即，释放后和纳塔尔扩散）的重新引入东方鹳Ciconia boyciana人口在日本，并确定了在2005-2019年繁殖成功的决定因素。我们假设，繁殖成功的关键决定因素之一是通过后释放和纳塔尔扩散的密度依赖效应。F1代发生时间对应于初次重新引入后2年，F2至7年，F3至11年，F4至14年。野生鸟类占74%的再引入的人口在F4发生。释放后的扩散距离短于纳塔尔扩散。巢间距离被选为决定育种成功的关键因素。这些结果可能是由于饲养栖息地恢复和同种相互作用。总之，稳定招聘到下一代被认为是由于适度的纳塔尔分散和随后的低繁殖密度的野生出生的鸟类。
Summary Species restoration through reintroduction and reinforcement is widely considered as an effective method for the conservation of threatened animals. Although these approaches have been increasingly implemented over the last half-century, many attempts have failed. Dispersal behaviour is one of the key factors determining reintroduction success. We reported the demographic composition and dispersal pattern (i.e., post-release and natal dispersal) of a reintroduced Oriental Stork Ciconia boyciana population in Japan and identified the determinants of breeding success in 2005–2019. We hypothesized that one of the key determinants of breeding success is the density-dependent effect through post-release and natal dispersal. The F1 generation occurrence corresponded to two years, F2 to seven, F3 to 11, and F4 to 14 years after initial reintroduction. Wild-born birds accounted for 74% of the reintroduced population at F4 occurrence. Post-release dispersal distances were shorter than natal dispersal. Inter-nest distance was selected as the key factor determining breeding success. These results may have been due to feeding habitat restoration and conspecific interactions. In conclusion, steady recruitment to the next generation is thought to be due to a moderate natal dispersal and the subsequent low breeding density of wild-born birds.