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估计阿拉斯加胡须海的人口参数,Erignathus barbatus,使用近亲标记重新捕获方法

Brian D Taras¹, Paul B Conn², Mark V Bravington³

¹Alaska Department of Fish and Game Statewide Marine Mammals Juneau USA.

Evolutionary applications

|November 11, 2024

概括

近亲标记回收 (CKMR) 方法估计胡须海数量约为409,000,占雄性繁殖成功的比例. 这些重要数据有助于管理这个受威胁的冰海种群.

科学领域:

野生动物群体的动态.
保护遗传学保护遗传学
海洋哺乳动物生态学

背景情况:

与冰相关的鱼或冰海对阿拉斯加原住民社区至关重要.
贝林基亚独特的胡须海 (Erignathus barbatus nauticus) 种群被列为受威胁种群.
准确的种群估计对于有效管理捕捞物种至关重要.

研究的目的:

用近亲标记重新捕获 (CKMR) 来估计胡须海的种群参数.
首次将CKMR方法应用于海洋哺乳动物.
为危物种和捕捞物种的管理策略提供信息.

主要方法:

1758只捕获的胡须海 (1998-2020年) 的基因定型,用于亲属关系分析.
使用父母-子女对 (POP),半兄弟姐妹对 (HSP) 和祖父母-孙子对 (GGP).
采用统计CKMR模型,以适应男性繁殖成功的异质性.

主要成果:

在1484只海中确定了亲属关系,包括POP,HSP和GGP.
在男性生殖成功中存在异质性的证据,没有发现完整的兄弟姐妹对.
丰富度估计为~409,000 (CV=0.35) 使用一个模型来计算繁殖成功的变化.

结论:

CKMR是估计海洋哺乳动物数量和人口统计的一个可行的方法.
对繁殖成功异质性的考虑显著影响了丰度估计.
为了保护,CKMR提供了关于生存,生育能力和繁殖成功的宝贵见解.

关键词:

丰富度估计丰富度估计亲属关系亲属关系生命史生命史的人生史福西德 (Focid) 是一种可怕的药物.生计的收获生活的收获.幸存率幸存率生存率

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