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首页> 外文期刊>Comparative parasitology >Microhabitat Use of Allocreadium lobatum (Trematoda) in Creek Chub (Semotilus atromaculatus) in Southeastern Nebraska
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Microhabitat Use of Allocreadium lobatum (Trematoda) in Creek Chub (Semotilus atromaculatus) in Southeastern Nebraska

机译：在内布拉斯加州东南部的Creek Chub（Semotilus Atromaculatus）的Allocriodium Lobatum（Trematoda）的微幼儿植物使用

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摘要

Microhabitat use of Allocreadium lobatum (Trematoda) in the intestine of creek chub (Semotilus atromaculatus) was studied using natural infections. Seventy-six creek chub harboring only A. lobatum in their intestine provided data on the position of 212 worms along the length of the intestine. Positions of worms within the intestine covaried strongly with host size and therefore intestinal length; worm positions standardized by intestinal length eliminated this relationship. Analyses of standardized worm positions (worm location) revealed that microhabitat use did not vary with worm size, maturity, or number of eggs in the uterus. Individuals of A. lobatum occurred throughout the intestine, but were concentrated in the posterior 30% of the intestine, regardless of demographic properties of the worms themselves. Standardized niche breadths of parasite infrapopulations suggested strict microhabitat specificity, but nearest-neighbor analyses revealed very little aggregation of worms in infrapopulations beyond what is expected by chance. Overall, trematodes of this species appear to exhibit some microhabitat specificity when examined with snapshot, field-collected data, but there is no clear indication of what mechanism might produce the observed pattern. Use of the intestine by individuals of A. lobatum might be more dynamic than can be revealed by the present investigation or studies similar to it.
机译：使用自然感染研究了在溪Chub（Semotilus Atromaculatus）肠道中的Allocriodium Lobatum（Trematoda）的微幼儿植物使用。七十六溪Chub窝藏只有A. Lobatum在他们的肠道中提供了沿肠的长度的212蠕虫的位置。肠内蠕虫的位置强烈地与宿主尺寸强烈，因此肠长;通过肠长的蠕虫位置消除了这种关系。标准化蠕虫位置的分析（蠕虫位置）透露，微藻使用的使用没有因子宫中蠕虫大小，成熟度或卵数而变化。无论蠕虫本身的人口统计属性如何，都会发生在整个肠道中，但在整个肠道中均浓缩，但浓缩于肠道后30％。标准化的寄生虫替代性的地面型射频提出了严格的微藻特异性，但最近的邻居分析显示出侵占蠕虫的极少聚集，超出了预期的抵制。总体而言，当用快照，现场收集的数据检查时，此类物种的震颤似乎表现出一些微藻特异性，但目前没有明确指示机制可能产生观察到的模式。使用A的个人的肠道可能比目前的调查或类似的研究透露，这些肠道可能更加活跃。

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