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首页> 外文期刊>Comparative parasitology >Microhabitat Specificity of Paulisentis missouriensis (Acanthocephala) in Creek Chub (Semotilus atromaculatus) in Southeastern Nebraska, U.S.A.
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Microhabitat Specificity of Paulisentis missouriensis (Acanthocephala) in Creek Chub (Semotilus atromaculatus) in Southeastern Nebraska, U.S.A.

机译：美国东南部内布拉斯加州的Creek Chub（Semotilus atromaculatus）中的Paulisentis missouriensis（Acanthocephala）的微生境特异性。

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摘要

Microhabitat specificity of Paulisentis missouriensis (Acanthocephala) in the intestine of creek chub (Semotilus atromaculatus) was studied. Data from 64 naturally infected fish harboring only P. missouriensis were utilized to determine if site specificity of worms varied by sex, size, and reproductive maturity, and to test the hypothesis that the first flexure of the intestine of creek chub is the preferred microhabitat, as reported in the literature. Location of worms within the intestine did not differ among size classes of either female or male worms. However, gravid female worms occupied intestinal segments around the first flexure of the intestine, whereas nongravid females were concentrated in the posterior part of the intestine around the second flexure. The distribution of males coincided with that of gravid females. These data suggest that P. missouriensis initially establishes in the posterior regions of the intestine of creek chub, after which they move anteriorly, mate, and come to occupy positions centered around the first flexure of the intestine.
机译：研究了Paulisentis missouriensis（Acanthocephala）在小河（Semotilus atromaculatus）肠道中的微生境特异性。利用来自64只只怀有密苏里假单胞菌的自然感染鱼的数据来确定蠕虫的部位特异性是否随性别，大小和繁殖成熟度而变化，并检验以下假设：小的第一个弯曲部位是首选的微生境，如文献报道。蠕虫在肠内的位置在雌虫或雄虫的大小等级之间没有差异。然而，妊娠的雌性蠕虫在肠道的第一挠曲周围占据了肠段，而非重卵的雌虫则集中在肠道的第二挠曲附近。男性的分布与妊娠女性的分布相吻合。这些数据表明，密苏里假单胞菌最初建立在小河肠的后部区域，之后它们向前移动，交配并占据以肠的第一弯曲为中心的位置。

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