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首页> 外文期刊>Journal of Parasitology >Spatial and temporal patterns of intraspecific morphological variation in Dactylogyrus simplexus from fathead minnows in Nebraska.
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Spatial and temporal patterns of intraspecific morphological variation in Dactylogyrus simplexus from fathead minnows in Nebraska.

机译：内布拉斯加州黑头fat的 Dactylogyrus simplexus 种内形态变化的时空格局。

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摘要

Dactylogyrus simplexus Monaco and Mizelle, 1955, occurs on the gills of fathead minnows (Pimephales promelas). Previous research on parasites of fathead minnows from 3 converging Nebraska streams, Elk Creek, Oak Creek, and West Oak Creek, shows that fish in each stream constitute distinct populations. To determine whether their parasites had diverged structurally in response to such isolation, or in response to seasonal change, we searched for patterns of intraspecific morphometric variation among D. simplexus. Over 3 collection dates in fall 2007, spring 2008, and fall 2009, 203 D. simplexus were collected from Elk and West Oak Creeks. We ran 1-way ANOVA to compare differences in 15 distinct point-to-point measurements of sclerotized parts across sites and collection dates. Significant differences were found in some D. simplexus measurements between Elk and West Oak Creeks for all 3 collection dates, but the characteristics that differed and the trend of variation between the creeks were not consistent over time. Dactylogyrus simplexus from both Elk and West Oak Creeks showed consistent patterns of variation over time for 5 measurements, including hamulus gap width, bar length, marginal hook length, sickle length, and sickle width. In conclusion, D. simplexus demonstrate consistent patterns of seasonal variation, but not spatial.
机译：Dactylogyrus simplexus Monaco and Mizelle，1955年，发生在黑头min鱼（Pimephales promelas ）的ill上。先前对3条汇聚的内布拉斯加州溪流，麋鹿溪，橡树溪和西橡树溪的of头min鱼的寄生虫进行的研究表明，每种溪流中的鱼类构成不同的种群。为了确定它们的寄生虫是否在结构上因这种隔离而异，或响应季节变化而异，我们在 D之间寻找种内形态计量学变异的模式。 simplexus 。在2007年秋季，2008年春季和2009年秋季的3个收集日期中，203D。单纯草是从Elk和West Oak Creeks收集的。我们进行了1次方差分析，比较了跨站点和收集日期的15个不同的硬化部分的点对点测量的差异。在某些 D中发现了显着差异。在所有3个采集日期的麋鹿和西橡树溪之间的单纯形测量，但是随着时间的流逝，特征有所不同，小溪之间的变化趋势也不一致。来自Elk和West Oak Creeks的 Dactylogyrus simplexus 在5次测量中显示出一致的随时间变化的模式，包括肌间隙宽度，条长，边缘钩长，镰刀长度和镰刀宽度。总之，D。 simplexus 显示了一致的季节性变化模式，但没有空间变化。

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