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长寿类动物繁殖的累积成本

Matthew T Turnley¹, Tabitha A Hughes¹, Randy T Larsen¹

¹Department of Plant and Wildlife Sciences, Brigham Young University, 4105 Life Sciences Building, Provo, UT 84602, United States.

Journal of mammalogy

|November 26, 2024

概括

鹿 (Cervus canadensis) 的繁殖成本可以持续多年,影响未来的怀孕. 然而,个体质量可能会取代这些累积效应,允许一些鹿尽量减少权衡.

科学领域:

生态生态学生态生态学
进化生物学进化生物学
生殖生物学生殖生物学

背景情况:

生命史理论预测繁殖的累积成本影响衰老.
对于类动物的累积生殖成本的经验证据有限,特别是在非连续年间.
以前的研究往往只关注每年的生殖力度和产量.

研究的目的:

调查鹿 (Cervus canadensis) 之前的生殖力度和未来的生殖产出之间的关系.
专门检查这些关系跨非连续年 (1和2年前).
为了确定哺乳期持续时间和妊娠史对随后怀孕概率的影响.

主要方法:

对怀孕状态,哺乳期持续时间和年龄类别的分析犹他州 2019-2022 年的鹿.
统计建模以评估过去的生殖努力 (怀孕,哺乳期) 对当前怀孕概率的影响.
评估非连续一年 (1年和2年前) 对生殖产出的影响.

主要成果:

之前的怀孕状态 (1或2年前) 和年龄对Elk.的当前怀孕概率没有影响.
前一年和前两年的哺乳期持续时间对当前怀孕的可能性产生了负面影响.
连续几年的哺乳期之间的积极相互作用最好地解释了与怀孕状态的关系.

结论:

累积的,多年的生殖成本显著影响女性的生殖产量.
个体质量起着至关重要的作用,可能使高质量的个体能够减轻或推翻生殖性权衡.
这些发现凸显了大型类动物繁殖的长期能量需求.

关键词:

科尔维斯 (Cervus canadensis) 是一个在加拿大大陆的动物.鹿鹿是什么意思犹他州犹他州犹他州犹他州年龄的年龄年龄的年龄.怀孕的时间怀孕的时间个体质量的个体质量.哺乳期哺乳期哺乳期生殖成本生殖成本类动物类动物

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