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首页> 外文期刊>Parasitology >Seasonal dynamics of the cestode fauna in spiny dogfish, Squalus acanthias (Squaliformes: Squalidae)
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Seasonal dynamics of the cestode fauna in spiny dogfish, Squalus acanthias (Squaliformes: Squalidae)

机译：棘角dog鱼（Squalus acanthias）（Squaliformes：Squalidae）的甲壳动物的季节性动态

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摘要

SUMMARY This study furthers understanding of cestode infections in a marine environment through time and space by following seasonal fluctuations in infection parameters of three cestode species (Gilquinia squali, Trilocularia gracilis and Phyllobothrium squali) parasitizing spiny dogfish (Squalus acanthias) in the northwest Atlantic and comparing them to work previously published from the northeast Atlantic on T. gracilis. For each cestode species, host size, season and presence of the other cestode species were analysed using generalized linear models to determine if they were good predictors of prevalence and intensity. Infection parameters differed across season for the three cestode species. However, within T. gracilis seasonal trends were found to be remarkably similar on both sides of the Atlantic, differing only in a somewhat delayed decline in prevalence in the northwest Atlantic. The differences seen in infection measures across cestode species likely reflect the unique life history strategies of different parasite species. While general trends appear to be maintained across disparate localities, variation seen is likely due to differences in accessibility to intermediate hosts and host diet across sites. The knowledge gained from understanding cestode infections in the vast ocean environment allows us to speculate about the factors driving fluctuations in parasite infections in elasmobranchs.
机译：总结本研究通过追踪西北大西洋的三种est鱼（Gilquinia squali，Trilocularia gracilis和Phyllobothrium squali）的寄生参数，并通过比较西北大西洋沿时的海洋环境中对est的感染，并进行比较，来进行比较他们的工作是以前在东北大西洋发表的T. gracilis。对于每种c目物种，使用广义线性模型分析宿主大小，季节和其他c目物种的存在，以确定它们是否是患病率和强度的良好预测指标。三种c科动物的感染参数在整个季节都不同。然而，发现纤毛虫的季节性趋势在大西洋两岸极为相似，只是在西北大西洋的流行率下降方面有所延迟。跨尾est物种感染措施的差异可能反映了不同寄生虫物种独特的生命史策略。虽然不同地区的总体趋势似乎保持不变，但看到的差异很可能是由于中间宿主的可及性和不同地点宿主饮食的差异所致。通过了解广阔的海洋环境中的est虫感染而获得的知识使我们能够推测出驱动弹性分支中寄生虫感染波动的因素。

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