【2h】

Blending in with the crowd: social parasites integrate into their host colonies using a flexible chemical signature.

机译:与人群交融:社交寄生虫利用灵活的化学特征整合到其宿主菌落中。

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摘要

Social parasites are able to exploit their host's communication code and achieve social integration. For colony foundation, a newly mated slave-making ant queen must usurp a host colony. The parasite's brood is cared for by the hosts and newly eclosed slave-making workers integrate to form a mixed ant colony. To elucidate the social integration strategy of the slave-making workers, Polyergus rufescens, behavioural and chemical analyses were carried out. Cocoons of P. rufescens were introduced into subcolonies of four potential host species: Formica subgenus Serviformica (Formica cunicularia and F. rufibarbis, usual host species; F. gagates, rare host; F. selysi, non-natural host). Slave-making broods were cared for and newly emerged workers showed several social interactions with adult Formica. We recorded the occurrence of abdominal trophallaxis, in which P. rufescens, the parasite, was the donor. Social integration of P. rufescens workers into host colonies appears to rely on the ability of the parasite to modify its cuticular hydrocarbon profile to match that of the rearing species. To study the specific P. rufescens chemical profile, newly emerged callows were reared in isolation from the mother colony (without any contact with adult ants). The isolated P. rufescens workers exhibited a chemical profile closely matching that of the primary host species, indicating the occurrence of local host adaptation in the slave-maker population. However, the high flexibility in the ontogeny of the parasite's chemical signature could allow for host switching.
机译:社交寄生虫能够利用其宿主的通信代码并实现社交融合。为了建立殖民地,新交配的奴隶制蚁后必须侵占宿主殖民地。寄主照顾着这个寄生虫的巢穴,新近封闭的奴隶制造工人融合在一起,形成了一个混合蚁群。为了阐明奴隶制工人的社会融合策略,进行了紫叶麦草(Berergus rufescens),行为和化学分析。芸苔假单胞菌的茧被引入到四个潜在寄主物种的亚菌落中:福美卡亚种Serviformica(福美卡cunicularia和F. rufibarbis,通常的寄主物种; F。gagates,稀有寄主; F。selysi,非天然寄主)。照顾奴隶制的雏鸟,新出现的工人表现出与成年的福米卡的一些社交互动。我们记录了腹壁对营养的发生,其中寄生虫rufescens是供体。褐红假单胞菌工人向寄主殖民地的社会融合似乎依赖于该寄生虫改变其表皮碳氢化合物轮廓以使其与饲养物种相匹配的能力。为了研究特定的红景天化学特性,将新出现的call从与母体隔离的地方饲养(不与成年蚂蚁接触)。被隔离的红褐斑病菌工人的化学特征与主要寄主物种的化学特征非常匹配,表明在奴隶制造者群体中发生了局部寄主适应。然而,寄生虫的化学特征的个体发育的高度灵活性可以允许宿主切换。

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