Riverside wren pairs jointly defend their territories against simulated intruders
Riverside wren pairs jointly defend their territories against simulated intruders
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河滨鹪鹩对共同保卫自己的领地，抵御模拟入侵者
DOI：
10.1111/eth.12694
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发表时间：
2017
期刊：
影响因子：
1.7
通讯作者：
Quirós-Guerrero E
中科院分区：
文献类型：
--
作者：
Quirós-Guerrero E
二重唱是一种共同产生的信号，两个或更多的人通过重叠或交替他们的歌曲来协调他们的发声。二重奏在伙伴关系内的广泛背景下使用，从领土防御到维持夫妻关系。有人建议，协调歌曲的配对也可能更好地协调其他活动，包括筑巢、父母照顾和捍卫共享资源。在这里，我们在河边的Wren(CanorChilus Semibadius)身上进行了测试，这是一种能产生高度协调的二重唱的新热带二重唱物种，看看雄性和雌性是否对回放表现出类似的反应。在鸣禽物种的领土争端中，个体倾向于将他们的注意力转向同性领土入侵者，但这种偏见在二重唱物种中可能不那么明显。我们进行了一项双扬声器回放实验，以考察交配个体对播放男女二重唱贡献的扬声器的反应。我们发现，当对模拟的成对入侵者做出反应时，河边的乌鸦具有高度的汇聚行为，它们通过二重奏和保持彼此的紧密接近来做出反应。男性和女性在保卫自己的领土时，有超过80%的时间相隔不到1米。一对中的两个人都积极地与男性和女性模拟入侵者接触，方法是走近两个说话者，并花同样多的时间靠近两个说话者。这些结果表明，两性都将成对的领土入侵视为类似的威胁，双方都投入了大量资金来捍卫共享的资源。这项研究是为数不多的证明交配伴侣对模拟的同性和异性入侵者具有同等关注和攻击性的研究之一。我们认为，在保卫领土时，伙伴之间保持近距离的距离有助于共同协调其共同领土信号，因此在保卫领土时，伙伴之间的共同反应可能有利于物种之间的二重奏。
Duets are a jointly produced signal where two or more individuals coordinate their vocalizations by overlapping or alternating their songs. Duets are used in a wide array of contexts within partnerships, ranging from territory defence to pair bond maintenance. It has been proposed that pairs that coordinate their songs might also better coordinate other activities, including nest building, parental care and defending shared resources. Here, we tested in the riverside wren (Cantorchilus semibadius), a neotropical duetting species that produces highly coordinated duet songs, whether males and females show similar responses to playback. During territorial disputes in songbird species, individuals tend to direct their attention towards same‐sex territorial intruders, but this bias might be less pronounced in duetting species. We performed a dual‐speaker playback experiment to examine how mated individuals respond to speakers broadcasting female‐versus‐male duet contributions. We found that riverside wrens have high levels of converging behaviour by duetting and remaining in close proximity to one another when responding to simulated paired intruders. Males and females spent more than 80% of their time less than 1 m apart while defending their territory. Both individuals in a pair aggressively engaged with both male and female simulated trespassers by approaching equally close and spending equal time near the two speakers. These results suggest that both sexes perceive a paired territorial intrusion as a similar threat and that both partners are highly invested in defending the shared resources. This study is one of the few to demonstrate equal attention and aggression from mated pairs towards simulated same‐sex and opposite‐sex intruders. We suggest that pairs responding together, in close proximity to one another, might be favourable in duetting species when defending the territory because maintaining a close distance between partners facilitates the extreme coordination of their joint territorial signals.
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