Anikieva L V, Ieshko E P
Parazitologiia. 2010 May-Jun;44(3):217-25.
Morphological variability of the cestode Proteocephalus longicollis from the smelt Osmerus eperlanus L., which was spontaneously introduced into the Syamozero Lake, has been studied. It was established that P. longicollis became an abundant element of the smelt parasite fauna during last 20 years, thereby showing the absence of host specificity. It was revealed that morphological polymorphism of P. longicollis from smelt combines features of ecological forms characteristic for aboriginal host species, namely whitefish Coregonus lavaretus L. and vendace Coregonus albula L. Cestodes from smelt are more similar to ecological forms from whitefish by the characteristics of variability. It is concluded that colonization of a host species, which is new for a given water body, is accompanied by the forming of a new group of host, which contributes to the maintenance of the parasite number and to its population stability under changing conditions of freshwater ecosystems.
对自然引入西亚莫泽罗湖的胡瓜鱼（Osmerus eperlanus L.）体内的长头原头绦虫（Proteocephalus longicollis）的形态变异性进行了研究。结果表明，在过去20年里，长头原头绦虫已成为胡瓜鱼寄生虫区系中的一个丰富组成部分，这表明它不存在宿主特异性。研究发现，来自胡瓜鱼的长头原头绦虫的形态多态性结合了土著宿主物种（即白鲑Coregonus lavaretus L.和湖拟鲤Coregonus albula L.）典型生态型的特征。从变异性特征来看，来自胡瓜鱼的绦虫与来自白鲑的生态型更为相似。得出的结论是，对于特定水体而言新的宿主物种的定殖伴随着新宿主群体的形成，这有助于在淡水生态系统条件变化的情况下维持寄生虫数量及其种群稳定性。
