title: [The role of fish parasites in fresh-water ecosystems exemplified by a parasite of the smelt (Osmerus eperlanus)].
abstract: The European smelt Osmerus eperlanus had been accidentally introduced into the ecosystem of the Syamozero Lake (Karelia). The population of this species has achieved a high density and caused serious changes in the structure and trophic relationships of fish community of the Syamozero ecosystem. The microsporidia Glugea hertwigi Weisenberg, 1921 has become a new and super-dominant parasite of the european smelt in this ecosystem. The invasion of microsporidia has caused a mass death of fishes, that has led to changes in population structure of the smelt and lowered a fish catch. The present study suggests to show a role of parasites in the ichthyocenosis structure regulation in freshwater ecosystem.
authors.forename: E P
authors.initials: EP
authors.lastname: Ieshko
authors.forename: N V
authors.initials: NV
authors.lastname: Evseeva
authors.forename: O P
authors.initials: OP
authors.lastname: Sterligova
mesh_terms: D000818:Animals; D017753:Ecosystem; D005260:Female; D005393:Fish Diseases / Q000469:parasitology; D005399:Fishes / Q000469:parasitology*; D005618:Fresh Water; D006790:Host-Parasite Interactions; D008297:Male; D016816:Microsporida; D016881:Microsporidiosis / Q000469:parasitology / Q000662:veterinary; D011156:Population Density; D012621:Seasons
vernacular_title: Rol' parazitov ryb v presnovodnykh ékosistemakh na primere parazita koriushki (Osmerus eperlanus).