title: [Specific features of the numbers and structure of the population of Proteocephalus longicollis (Zeder 1800) (Cestoda: Proteocephalidea)--a mass parasite of whitefish Coregonus lavaretus L. under conditions of technogenic pollution of the water body].
abstract: The numbers, age structure, and morphological variation of the cestode Proteocephalus longicollis from whitefish of a natural water body (Kamennoe Lake) and those of Kostomuksha Lake polluted with wastes of the mining industry (Northern Karelia) have been studied. In the polluted water body, a high infestation of whitefish and domination of larval stages in the structure of the parasite population have been established. It is shown that under conditions of pollution, only one of the variations ofscolex signs dominates in the structure of phenotypic diversity. The size indices of cestodes are reliably smaller as compared with cestodes from the natural water body. The data obtained indicate that technogenic pollution determines a decrease in the intrapopulation diversity of P. longiocollis, and a decrease in the values of morphometric characters indicates inhibition of the morphophysiological state of individuals.
authors.forename: L V
authors.initials: LV
authors.lastname: Anikeeva
authors.forename: E P
authors.initials: EP
authors.lastname: Ieshko
authors.forename: N V
authors.initials: NV
authors.lastname: Il'mast
authors.forename: D I
authors.initials: DI
authors.lastname: Lebedeva
authors.forename: Ia A
authors.initials: IaA
authors.lastname: Kuchko
mesh_terms: D000818:Animals; D002589:Cestoda / Q000033:anatomy & histology* / Q000502:physiology; D060106:Lakes; D011157:Population Dynamics; D012426:Russia; D012487:Salmonidae / Q000469:parasitology*; D014877:Water Pollution, Chemical