Распределение очагов инвазии литоральных моллюсков партенитами и личинками трематод в губах и заливах Мурманского побережья в мае–июне 2021 года

Abstract

Species composition and geographical variation in the distribution of digenean parthenite and larvae in intertidal snails in the littoral zones along the Murmansk coast were examined. Four species of littoral gastropods (Littorina saxatilis, L. obtusata, L. littorea and Nucella lapillus) were investigated. We found 10 species of digeneans, of which 9 have marine birds as a final host. The exception was Podocotyle atomon which uses fish as a definitive host. Larvae of trematode Microphallus pygmaeus, M. piriformes and Podocotyle atomon are found everywhere on the Murmansk coast. The richest helminth fauna were recorded in the Kola Bay and in Ivanovskaya Bay, the poorest helminth fauna were recorded in Dvorovaya Bay. No pronounced trends in distribution of infection foci were noted. Trematode prevalence appears to be predominantly determined by local site condition favoring or hindering final host (birds and fishes) abundance.