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Host body microcosm and ectoparasite infracommunities: Arthropod ectoparasites are not spatially segregated

机译:寄主体的微观世界和体外寄生虫群落:节肢动物的体外寄生虫在空间上不是隔离的

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摘要

We studied the distribution of ectoparasite species (an ixodid tick, a chigger mite, 7 mesostigmate mites, 5 fleas and 3 lice) on bodies of 5 species of rodent hosts from the marshlands in Argentina to establish whether arthropod ectoparasites are segregated across body parts of the same host individual. We asked (a) whether an individual ectoparasite species prefers certain parts of the body of its host and, if yes, whether these preferences overlap among ectoparasite species; (b) whether ectoparasite species composition differs among different parts of a host's body; and (c) whether co-occurrences of ectoparasite species within pre-defined body parts of a host are non-random and, if yes, whether ectoparasites co-occur in the same body part of a host either less or more often than expected by chance. It was found that, in general, ectoparasite species were not segregated across body parts of a host. Although some ectoparasites preferred certain body parts, these preferences were similar among ectoparasites belonging to different species and/or higher taxa resulting in similarity among host body parts in ectoparasite species composition. In addition, ectoparasite species demonstrated a tendency to co-occur on the same body parts of a host and not to be segregated among them. It was concluded that the distribution of ectoparasites on the body of a small mammalian host is driven mainly by their interaction with the host rather than by distinct preferences or interactions among ectoparasite species.
机译:我们研究了来自阿根廷沼泽地5种啮齿动物宿主体内的外寄生虫种类((螨,tick螨,7个近me螨,5个跳蚤和3虱)的分布,以确定节肢动物外寄生虫是否在人体的各个部位分离同一主持人。我们问(a)单个外寄生虫物种是否偏爱其寄主身体的某些部位,如果是,这些偏好是否在外寄生虫物种之间重叠; (b)寄主体内不同部位的体外寄生虫种类组成是否不同; (c)在宿主的预先确定的身体部位内共存的寄生虫种类是否是非随机的;如果是,是否在宿主的同一身体部位内共存寄生虫的发生率比预期的少或多?机会。已发现,通常,外寄生物物种并未在宿主的身体部位之间隔离。尽管某些体外寄生虫偏爱某些身体部位,但在属于不同物种和/或较高分类群的体外寄生虫中,这些偏好相似,从而导致宿主体内不同部位的体外寄生虫物种组成相似。另外,外寄生物物种显示出在宿主的相同身体部位上共存并且不隔离的趋势。结论是外寄生虫在小型哺乳动物宿主体内的分布主要是由它们与宿主的相互作用驱动的,而不是由外寄生虫物种之间独特的偏好或相互作用驱动。

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