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首页> 外文期刊>Journal of Parasitlolgy >INITIAL INFECTION, DISTRIBUTION, AND SEASONAL OCCURRENCE OF HOFERELLUS GILSONI (MYXOZOA) WITHIN A POPULATION OF ANGUILLA ROSTRATA (ANGUILLIDAE) IN SOUTHERN NOVA SCOTIA
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INITIAL INFECTION, DISTRIBUTION, AND SEASONAL OCCURRENCE OF HOFERELLUS GILSONI (MYXOZOA) WITHIN A POPULATION OF ANGUILLA ROSTRATA (ANGUILLIDAE) IN SOUTHERN NOVA SCOTIA

机译：南新斯科舍省轮虫（Anguilla rostrata）（Anguillidae）种群内河豚金龟子（粘菌）的初始感染，分布和季节性发生

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摘要

Recently transformed elvers of Anguilla rostrata, entering the mouth of the East River in the Timber/Connaught Lake watershed (Nova Scotia) from the sea in mid-May, did not develop infections of the urinary bladder parasite Hoferellus gilsoni (Myxozoa) after nearly 3 mo in captivity. However, 40% of elvers collected from the mouth of the river in early June and 80% in late June exhibited patent infections by mid-August. It is speculated that given this initial level of infection, the summer run of elvers (estimated to be 208,000–963,000 individuals annually) represents a significant upstream dispersal of spores. Infections in yellow eel, which has a limited home range, probably contribute to spore dispersal within the home range and downstream through spore drift. Sporogenesis occurred in samples of yellow eel collected over an 8-mo period from April to November. Eel length was similar in 3 widely separated sampling locations in the watershed. Prevalences at these localities were 44, 36, and 57% in April and, by June, reached 76, 70, and 90%, respectively. Prevalences remained near the June levels until sampling ceased in November 1998. Studies on captive fish suggest that H. gilsoni can overwinter in the eel. Data from the study indicate that immediate infection of young elvers entering the system, effective spore dispersal, and a seasonally extended sporogenesis all contribute to the ubiquitous presence of the parasite in the eel population.
机译：最近被改造的安圭拉·罗斯特拉塔（Anguilla rostrata）的五月中旬从海上进入木材/康诺特湖分水岭（新斯科舍省）的东河河口，在将近3个小时后并未感染膀胱寄生虫霍格氏菌囚禁中的钼。但是，到8月中旬，从河口收集的40％的老人和6月下旬的80％的老人出现了专利感染。据推测，鉴于最初的感染水平，高龄者的夏季活动（估计每年有208,000–963,000个人）代表着孢子的显着上游扩散。黄色鳗鱼的感染范围有限，可能会导致孢子在宿主范围内以及通过孢子漂移向下游扩散。在从4月到11月的8个月内收集的黄e样本中发生了孢子发生。在分水岭的3个广泛分离的采样位置，鳗鱼长度相似。这些地区的流行率在4月分别为44、36和57％，到6月分别达到76、70和90％。流行率一直保持在6月的水平附近，直到1998年11月停止采样。对圈养鱼的研究表明，吉尔氏梭菌可以在鳗鱼中越冬。这项研究的数据表明，进入系统的年幼幼鸽的即时感染，有效的孢子散布和季节性扩展的孢子发生都促进了鳗鱼种群中寄生虫的普遍存在。

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    《Journal of Parasitlolgy》 |2001年第5期|p.00000957-00000960|共4页
  • 作者

    Jason Melendy and David K. Cone*;

  • 作者单位

    Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J1*Corresponding author.;

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