Abstract
The paper presents research data on the fauna and qualitative composition of trematode cercaria of the families that maturate in mollusks, namely, Lymnaeidae, Planorbidae, and Physidae of the Kattakurgan Reservoir of the Samarkand Region. The work was carried out in the spring-summer and autumn time of 2017–2019 in the Kattakurgan Reservoir. There were 7510 mollusks (Lymnaeidae – 4116 specimens, Planorbidae – 2280 specimens and Physidae – 620 specimens) collected and investigated according to the known malacology methods. As our collections showed, 5 species were found here in 2017–2019 – L. auricularia, L. subdisjuncta, Costatelia acuta, Planorbis planorbis, and Anisus covexiusculus. Among them – Lymnaea auricularia and L. sudisjuncta live on the lower layers of plants, and are sometimes found on the slopes of the dam. Seven species of mollusks infected with trematode larvae were found in the examined reservoir. We found that the fauna of trematode cercaria from the studied reservoir is represented by 16 species belonging to 15 genera. The richest species diversity of cercariae in mollusks Planorbis planorbis is 6 species. Cercariae are represented by 5 species in mollusks Radix auricularia in the studied region.
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