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近亲标记-重新捕获可以告知极度危的陆地哺乳动物状况

Luke R Lloyd-Jones¹, Mark V Bravington², Kyle N Armstrong³

¹Commonwealth Scientific and Industrial Research Organisation, Data61, Brisbane, QLD, 4072, Australia. luke.lloyd-jones@csiro.au.

Scientific reports

|August 2, 2023

概括

近亲标记回收 (CKMR) 成功估计了临灭绝的圣诞岛飞狐 (CIFF) 种群. 这种遗传方法为保护岛上最后一只本土哺乳动物提供了至关重要的数据.

科学领域:

保护生物学保护生物学
人口遗传学人口遗传学
野生动物管理野生动物管理

背景情况:

准确的种群规模对于管理危物种至关重要.
标记回收方法是估计野生种群丰富度的标准.
圣诞岛飞狐 (CIFF) 处于极度危状态,是岛上最后一个本地陆地哺乳动物.

研究的目的:

首次将近亲标记再捕获 (CKMR) 方法应用于陆地物种.
估计CIFF管理的人口参数,克服其难以捉摸的性质和息地所带来的挑战.
提供可靠的人口估计,以告知保护工作.

主要方法:

利用了2015年至2019年期间捕获的450只CIFF的遗传数据.
在遗传数据中检测到亲属对.
实施了一种新的CKMR模型,以估计性别特定的丰度,趋势和死亡率,并纳入男性生殖倾斜和伴侣持久性.

主要成果:

估计总成年雌性CIFF数量约为2050个个体 (95%CI:9504300).
结果显示,只有23%的成年男性平均每年为生殖做出了贡献.
提供了强有力的证据,证明了野生的Pteropus物种在年间的伴侣忠诚.

结论:

CKMR是一个强大的工具,用于估计神秘和移动物种的人口参数.
这项研究为临灭绝的CIFF.提供了最强大的人口状况评估.
调查结果将直接为CIFF的当前和未来的保护战略提供信息.

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