鳗棘头虫（棘头虫纲）的交配
Copulation of Acanthocephalus anguillae (Acanthocephala).
作者信息
Dezfuli B S, De Biaggi S
机构信息
Department of Biology, University of Ferrara, Italy.
出版信息
Parasitol Res. 2000 Jun;86(6):524-6. doi: 10.1007/s004360050706.
A total of 114 specimens of brown trout, Salmo trutta Linnaeus, 1758, was sampled by electrofishing between October 1998 and July 1999 from the Ceresone stream (North of Padua, Italy). Over 63% of fish were infected with three species of helminth: a tapeworm, Cyathocephalus truncatus (Pallas, 1781), and two acanthocephalan species, Echinorhynchus truttae (Schrank, 1788) and Acanthocephalus anguillae (Muller 1780). On three occasions, in the fore-gut of three brown trout, three pairs of A. anguillae were found in copula. In all three cases, the male's bursa was fully extruded and firmly attached to the posterior region of the female. Cement was found inside the bursa suggesting that insemination had probably occurred. Eight female A. anguillae recovered in five other infected trout had attached copulatory caps.
1998年10月至1999年7月期间，通过电捕鱼法从意大利帕多瓦北部的切雷索内河采集了共计114份1758年命名的褐鳟（Salmo trutta Linnaeus）样本。超过63%的鱼感染了三种寄生虫：一种绦虫，截形杯首绦虫（Cyathocephalus truncatus，帕拉斯，1781年），以及两种棘头虫，褐鳟棘头虫（Echinorhynchus truttae，施兰克，1788年）和鳗棘头虫（Acanthocephalus anguillae，米勒，1780年）。有三次，在三条褐鳟的前肠中发现了三对正在交配的鳗棘头虫。在所有这三个案例中，雄性的交配囊完全外翻并牢固地附着在雌性的后部区域。在交配囊中发现了胶状物，表明可能已经发生了受精。在另外五条受感染的鳟鱼中回收的八条雌性鳗棘头虫有附着的交配帽。
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