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首页> 外文期刊>Oryx >Not so soft? Delayed release reduces long-term survival in a passerine reintroduction
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Not so soft? Delayed release reduces long-term survival in a passerine reintroduction

机译：没那么柔软吗？延迟释放降低了重新引入雀碱的长期存活率

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摘要

Reintroduction success depends in part on the release strategy used. Benefits are attributed to particular release strategies but few studies have tested these assumptions. We examined the effect of delayed release (a form of so-called soft release) on the survival of a threatened passerine, the New Zealand hihi Notiomystis cincta, for up to 7 months after translocation. Birds were captured at the source site and then held in captivity for disease screening. They were then taken to the release site, where 30 were released immediately and 28 were held for a further 2-4 days in an on-site aviary. Twenty-four birds were fitted with radio-transmitters. A 1,300 ha area around the release site was searched fortnightly, and survival was analysed using a multi-state model that accounted for the effect of transmitters on detection probability. Our results indicated that delayed release had a negative effect on long-term survival, but no effect was apparent in the first 6 weeks. Survival probability from 6 weeks to 7 months post-release was 0.77 +/- SE 0.20 for immediate-release birds and 0.04 +/- SE 0.06 for delayed-release birds. Our results suggest that there is a misconception about the benefits of delayed-release strategies during translocation of wild animals. Studies that have demonstrated a benefit of delayed release in other bird species used captive-bred individuals, and we suggest that wild individuals perceive captivity differently. We recommend that biological context is considered before delayed release is used in translocations.
机译：重新引入成功部分取决于所使用的发布策略。收益归因于特定的释放策略，但很少有研究检验这些假设。我们检查了延缓释放（一种所谓的软释放）形式对受威胁的雀花（新西兰hihi Notiomystis cincta）在移位后长达7个月的存活的影响。在源头捕获了鸟类，然后圈养以进行疾病筛查。然后将他们带到释放地点，在那里立即释放了30人，并在现场鸟笼中将28人再拘留了2-4天。 24只鸟装有无线电发射器。每两周对释放地点周围的1300公顷区域进行搜索，并使用考虑发射器对检测概率的影响的多状态模型分析存活率。我们的结果表明，延迟释放对长期生存有负面影响，但在开始的6周内没有明显影响。释放后6周到7个月的存活率，即刻释放鸟类为0.77 +/- SE 0.20，而延迟释放鸟类为0.04 +/- SE 0.06。我们的结果表明，对野生动物易位期间延迟释放策略的好处存在误解。研究表明，使用人工饲养的个体在其他鸟类中延迟释放的好处，我们建议野生个体对人工饲养的看法不同。我们建议在易位中使用延迟释放之前考虑生物学环境。

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