在高度入侵的哺乳动物中,后代的性别比率和母体分配的差异
Sarah M Chinn1, Timothy Smyser2, James C Beasley1
1Savannah River Ecology Laboratory, Warnell School of Forestry and Natural Resources University of Georgia Aiken South Carolina USA.
Ecology and evolution
|May 30, 2023
概括
野猪母亲调整 litter 尺寸,而不是后代的性别比率,以最大限度地提高健康状况. 子大小,而不是性别比,是母猪操纵的主要生殖特征,以增加野猪的生殖成功.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 动物行为 动物行为
背景情况:
- 在野生种群中,出生时性别比率偏差很常见,但父母对子女性别比率的控制以最大限度地提高健康状况尚未完全理解.
- 多种菌种面临后代的性别比率和 litter 规模/质量之间的权衡,影响母体的适应策略.
研究的目的:
- 在不同的环境条件下,研究野生猪 (Sus scrofa) 的母性性别分配策略.
- 为了确定母亲是否调整 litter 尺寸和/或性别比,以最大限度地提高个体健康,特别是在有利的条件下.
主要方法:
- 研究了野生猪 (Sus scrofa) 的母性性别分配.
- 分析了母性特征 (年龄,病情,祖先),环境因素 (资源可用性), litter 尺寸和后代性别比率之间的关系.
- 高质量的与低质量的母亲的生殖策略比较.
主要成果:
- 母亲的年龄,病情,血统和资源的可用性显示出与男性偏向的性别比率的弱相关性;未知因素可能起着更大的作用.
- 高质量的母亲通过增加 litter 尺寸来更多地投资生殖,而不是通过偏见后代的性别比率.
- 在子大小和后代性别比率之间没有发现显著的关系.
结论:
- 子大小调整,而不是性别比率操纵,是野猪用来提高母体健康的主要机制.
- 野生猪的母生殖策略主要是通过优化 litter 尺寸来响应环境条件来实现.
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