Low hatching success in the critically endangered kakapo (Strigops habroptilus) is driven by early embryo mortality not infertility
Low hatching success in the critically endangered kakapo (Strigops habroptilus) is driven by early embryo mortality not infertility
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极度濒危鸮鹦鹉（Strigops habroptilus）孵化成功率低的原因是早期胚胎死亡率，而不是不孕症
DOI：
10.1101/2020.09.14.295949
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Savage J
中科院分区：
文献类型：
--
作者：
Savage J
在许多濒危物种中，繁殖失败是恢复的主要障碍。极度濒危的kākāpōStrigops habroptilus就是这种挑战的例证：61%的蛋不能孵化，其中73%没有发育的迹象。未发育的卵子以前被认为是雄性不育的原因，但最近对非濒危鸟类的研究表明，在野外受精失败是罕见的。受精失败和胚胎死亡的潜在原因不同，因此区分它们对于有效的保护管理至关重要。在这里，我们展示了大多数（72%,n= 124）未发育的kākāpō卵受精，并将其与自然交配，人工授精和发育卵父权的保护计划数据相结合，以产生迄今为止野生种群中最精确的生育估计。我们还首次在野生鸟类身上证明，人工授精可以使更多的精子到达卵子。
In many endangered species, reproductive failure is a major barrier to recovery. The critically endangered kākāpōStrigops habroptilusexemplifies this challenge: 61% of their eggs fail to hatch, and of these 73% show no sign of development. Undeveloped eggs have previously been attributed to male infertility, but recent studies of non‐threatened bird species suggest fertilisation failure is rare in the wild. The underlying causes of fertilisation failure and embryo death differ, so distinguishing between them is essential for effective conservation management. Here we show that the majority (72%,n= 124) of undeveloped kākāpō eggs are fertilised, and combine this with conservation programme data on natural copulations, artificial inseminations, and paternity of developed eggs, to generate the most precise estimate to date of fertility in a wild population. We also demonstrate, for the first time in a wild bird, that artificial insemination results in greater numbers of sperm reaching the egg.