title: [Polypodium hydriforme in the eggs of the sterlet from the northern Dvina river].
abstract: The paper provides data on the invasion of Acipenser ruthenus (sterlet) in the North Dvina River by Polypodium hydriforme (Cnidaria). Prevalence and intensity of invasion proved to be similar for two fishing sites. Prevalence of invasion exceeded 88%, thus being exceptionally high for P. hydriforme. Intensity of invasion was from 1 to 436 eggs per female. A verage percentage of infected eggs was about 1%.
authors.forename: A Iu
authors.initials: AIu
authors.lastname: Ibragimov
mesh_terms: D000818:Animals; D003063:Cnidaria / Q000145:classification* / Q000166:cytology / Q000502:physiology; D005260:Female; D005393:Fish Diseases / Q000453:epidemiology / Q000469:parasitology*; D005399:Fishes / Q000469:parasitology* / Q000502:physiology; D005618:Fresh Water / Q000469:parasitology*; D010063:Ovum / Q000469:parasitology*; D015995:Prevalence; D012426:Russia / Q000453:epidemiology