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|Authors:||Левакин, И. А.|
Николаев, К. Е.
Галактионов, К. В.
|Title:||Влияние плотности поселения хозяина на заражение паразитами – анализ модели «личинки трематод – вторые промежуточные хозяева»|
|Other Titles:||Influence of host density on parasitic infection: analysis of the model “trematode larvae-second intermediate host”|
|Description:||In the field experiment the identical cages (16*16*8 cm) filled with uninfected blue mussels Mitylus edulis of different densities were exposed on the littoral site of the White Sea. The results of the experiment showed that increasing of host density resulted in decreasing of parasite abundance and infection rate. At the same time the density of parasite population (mean number of Himasthla elongata and Cercaria parvicaudata metacercariae per m2) was increased. It is assumed that a key condition for successful transmission via the small intermediate host, which serves as food source for the definitive host, is a high density of invasive stages of the parasite (metacercariae on square). It seems that this is more important parameter than high abundance or high infection rate of the second intermediate host, because the attractiveness of the feeding area is determined primarily by the density of food (individuals of the intermediate host). Thus, the values of prevalence, intensity of infection and mean abundance without the data on host density do not allow speculating about intensity of parasite transmission thorough the second intermediate host population.|
|Appears in Collections:||Современные проблемы теоретической и морской паразитологии / Contemporary problems of theoretical and marine parasitology|
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