资源获取如何影响交易权衡的检测
L Winkler1, K B McNamara2,3, M Lovegrove3
1Department of Zoology, Stockholm University, Svante Arrhenius väg 18b, 106 91 Stockholm, Sweden.
概括
在自然界中检测健身权衡是很困难的. 这项研究发现,资源获取分布不会影响的权衡检测,这表明其他因素,如资源分配的复杂性是关键的.
科学领域:
- 进化生物学 进化生物学
- 行为生态学 行为生态学
背景情况:
- 基本健身特征之间的权衡在理论上是无处不在的,但在经验上很难检测到.
- 人口资源获取水平的变化被认为是影响权衡可检测性的因素.
研究的目的:
- 用实验来测试资源获取在人口中的分布是否会影响检测健康权衡.
- 调查澳大利亚野外雄的前交,后交和免疫功能特征之间的权衡.
主要方法:
- 男性澳大利亚野 (Teleogryllus oceanicus) 接受了多样化的饮食,以创造不同的资源获取分布.
- 对生态相关的资源采集分布进行了实验操纵,并重新采样.
- 在这些不同的分布下,评估了男性健康特征 (性交前,性交后,免疫功能) 之间的权衡.
主要成果:
- 发现了男性健身特征之间的权衡证据.
- 资源获取在人口中的分布并没有系统地影响检测到的权衡的强度.
- 后交配特征和免疫功能之间的权衡是最强的,而前交配特征的权衡则较弱.
结论:
- 质疑了资源采购变化影响权衡检测的假设.
- 检测权衡的难以捉摸性可能源于其他因素,例如资源分配的层次复杂性.
- 调查结果强调了资源分配的复杂性及其对可观察到的健康权衡的影响.
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