合作繁殖和掠食风险对蛋分配和生殖产出的相互作用
Rita Fortuna1,2,3,4, Rita Covas1,3,5, Pietro B D'Amelio6,7
1CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, 4485-661, Vairão, Portugal.
概括
捕食风险减少了社交织者蛋的黄质量,但助手没有缓冲这种效应. 这突显了捕食,群体动态和合作繁殖者生殖投资之间的复杂相互作用.
科学领域:
- 行为生态学 行为生态学
- 进化生物学 进化生物学
- 生理生态生态学 生理生态学
背景情况:
- 捕食风险显著影响动物的行为,繁殖和健康.
- 在合作繁殖系统中,辅助者会影响繁殖者的状况和掠食风险.
- 助手对掠食风险对母亲分配的影响的缓冲效应尚未研究.
研究的目的:
- 调查掠食风险和群体大小对社会织物动物母生殖分配的相互作用影响.
- 为了确定辅助者的存在是否减轻了被认为的掠食风险对蛋特征和后代生存的负面影响.
主要方法:
- 社交性编织者接触到掠食者 (gabar goshawk) 的呼叫,以模拟增加的掠食风险.
- 通过离合体大小,卵子质量,黄体质量和黄体皮质来评估母体分配.
- 监测了与掠食风险和群体大小相关的后代化和飞行概率.
主要成果:
- 暴露于捕食者呼叫的雌性产卵的黄明显较轻 (4%的减少).
- 捕食者呼叫对离合体大小,蛋质量或黄皮皮质没有显著影响.
- 由于捕食者暴露,黄体质量的减少与群体大小无关,表明辅助者没有缓冲效应.
结论:
- 在社交性编织者中,辅助物质的存在并不能减轻掠食风险对母体对黄质量分配的影响.
- 减少黄体质量可能会损害后代的营养供应和生存,尽管这项研究中没有明确对化和鸟成功的直接影响.
- 需要进一步的研究来了解助手存在,掠食风险和母体生殖投资之间的进化权衡.
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