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首页> 外文期刊>Journal of Parasitology >Distribution, Abundance, and Genetic Diversity of Clinostomum spp. Metacercariae (Trematoda: Digenea) in a Modified Ozark Stream System
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Distribution, Abundance, and Genetic Diversity of Clinostomum spp. Metacercariae (Trematoda: Digenea) in a Modified Ozark Stream System

机译：斜纹夜蛾的分布，丰度和遗传多样性。改良的Ozark流系统中的尾cer（Trematoda：Digenea）

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摘要

Land-use alterations can have profound influences on faunal distributions, including host-parasite relationships. Yellow grub trematodes (Clinostomum spp.) have complex life cycles involving 3 hosts: a snail, a fish or amphibian, and a bird. Here, we analyze the distribution, prevalence, intensity, abundance, and genetic diversity of encysting metacercariae of Clinostomum spp. in salamanders and fishes throughout an aquatic system that includes a natural Ozark stream and man-made ponds. We found Clinostomum sp. infecting permanently aquatic Oklahoma salamanders (Eurycea tynerensis; 56%% prevalence) and larval grotto salamanders (Eurycea spelaea) immediately downstream from a man-made pond. However, Clinostomum sp. did not infect any salamanders in the spring that supplies this pond, or in sections farther downstream (a14a140.5 and 2 km). Metacercariae of Clinostomum sp. were present in a14a1490%% of introduced largemouth bass (Micropterus salmoides) in the man-made pond adjunct to the stream. Morphological examination and phylogenetic analyses based on the mitochondrial gene cytochrome oxidase 1 (Co1) and the nuclear ribosomal gene 18S show that fishes and salamanders at this site are primarily infected with Clinostomum marginatum. There is a relatively high degree of mitochondrial haplotype diversity in C. marginatum at this site but no consistent genetic difference between parasites in largemouth bass from the man-made pond and those in salamanders from the stream. Based on the microgeographic distribution and relationships of metacercariae of C. marginatum at this site, we hypothesize that the adjunct man-made pond has created an ecological situation that brings the cercariae of this parasite into contact with novel stream salamander hosts.
机译：土地利用的变化会对动物分布，包括寄主与寄生虫的关系产生深远的影响。黄色g吸虫（Clinostomum spp。）的生命周期复杂，涉及3个宿主：蜗牛，鱼类或两栖动物和鸟类。在这里，我们分析了斜纹夜蛾隐meta的分布，患病率，强度，丰度和遗传多样性。在sal和鱼的整个水生系统中，包括天然的欧扎克小溪和人造池塘。我们找到了Clinostomum sp.。永久感染人工池塘下游的永久性水生俄克拉荷马州（（Eurycea tynerensis;盛行率56％）和幼虫石窟sal（Eurycea spelaea）。但是，Clinostomum sp.。在春季没有为该池塘提供水supplies，也没有在更下游的部分（a14a140.5和2公里）内感染sal。斜纹夜蛾属的尾。在与河流相连的人造池塘中，约有14％至490 %%的引入的大嘴鲈（Micropterus salmoides）存在。基于线粒体基因细胞色素氧化酶1（Co1）和核糖体基因18S的形态学检查和系统发育分析表明，该位点的鱼类和sal主要感染了斜纹夜蛾。在此位置，毛缘衣原体的线粒体单倍型多样性相对较高，但人造池塘大嘴鲈和溪流sal中的寄生虫之间没有一致的遗传差异。基于在该站点的边缘隐孢子虫的微观地理分布和关系，我们假设该人工池塘已造成了一种生态环境，使该寄生虫的尾with与新型流sal宿主接触。

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