Manipulating badges of status only fools strangers
Manipulating badges of status only fools strangers
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DOI：
10.1111/ele.13128
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发表时间：
2018-10-01
期刊：
影响因子：
8.8
通讯作者：
Lyon, Bruce E.
中科院分区：
文献类型：
--
作者：
Chaine, Alexis S.;Shizuka, Daizaburo;Lyon, Bruce E.
冲突是有风险的，但允许动物在不具攻击性的情况下评估优势地位的机制可以降低此类成本。两种不同的竞争对手评估机制预计将在不同的背景下演变：在较大的匿名群体中预计会有身份徽章，而在小而稳定的群体中个人识别是可行的。然而，当社会互动在稳定的社会群体内部和之间发生时，这两种机制可能都很重要。我们对金冠麻雀(Zonotrichia Atricapilla)的羽毛进行了操纵，发现两种已知的身份标志--金色和黑头羽毛斑块大小--独立地影响着陌生人的支配地位，但操纵并不影响熟悉的鸟群成员的支配地位。此外，与陌生人相比，熟悉的鸟群成员表现出更少的攻击性和更多的觅食。我们的研究为社会认知影响徽章功能提供了明确的实验证据，并表明社会情境的变化维持了这两种支配解决机制的共存和上下文依赖的使用。
Conflict is risky, but mechanisms that allow animals to assess dominance status without aggression can reduce such costs. Two different mechanisms of competitor assessment are expected to evolve in different contexts: badges of status are expected in larger, anonymous groups, whereas individual recognition is feasible in small, stable groups. However, both mechanisms may be important when social interactions occur both within and across stable social groups. We manipulated plumage in golden-crowned sparrows (Zonotrichia atricapilla) and found that two known badges of status - gold and black head plumage patch sizes - independently affect dominance among strangers but manipulations had no effect on dominance among familiar flockmates. Moreover, familiar flockmates showed less aggression and increased foraging relative to strangers. Our study provides clear experimental evidence that social recognition affects badge function, and suggests that variation in social contexts maintains coexistence and context-dependent use of these two dominance resolution mechanisms.