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146 Микітчак Т.І.

Mykitchak T.I.
Cladocera and Copepoda (Cyclopoida, Calanoida) of the mountain part of the Stryi river basin
(Ukrainian Carpathians)
The Cladocera, Cyclopoida and Calanoida species diversity of the mountain part of the Stryi river
basin is described. The objects of research were found in 48 lenthic water bodies (Zhuravlyne lake,
Yavirske reservoir, numerous ponds, puddles, swamps, springs, and wells) and on 7 sections of the Stryi
and Yablunka rivers. 24 species of Cladocera, 23 Cyclopoida, and 1 Calanoida are found. The most
diverse is the fauna of Lake Zhuravlyne, which is located in the Skole Beskydy National Nature Park.
56% of the species diversity of the mentioned groups is noted in ponds, 42% in puddles and swamps,
8% in springs and wells, 15% in rivers, 10% in Yavirske reservoir, 44% in Zhuravlyne. The fauna of
the mountain part of the Stryi river basin includes 44% of the Cladocera, Cyclopoida and Calanoida
species diversity of the territory of the Ukrainian Carpathians. Only Eudiaptomus transylvanicus is
noted within Calanoida. Alona protzi, Eurycercus lamellatus, Simocephalus expinosus are found only
in the study area within the Ukrainian Carpathians. The most common species in this area are
Chydorus sphaericus (36% frequency of occurrence in the investigated lenthic water bodies) and
Eucyclops serrulatus (55%). These species are the most common in the Ukrainian Carpathians as well.
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The highest total density of Cladocera and Cyclopoida was 253,5 thous.ind./m . Daphnia obtusa, Alona
protzi, Eucyclops subterraneus, Paracyclops poppei та Grateriella unisetigera are rare species for
Lviv region. Eurycercus lamellatus, Simocephalus expinosus, Chydorus latus together with the previous
species are rare for the Ukrainian Carpathians in total. 47% of the investigated lenthic water bodies
are in oligosaprobic zone. The most valuable communities of the Cladocera, Cyclopoida and Calanoida
exist in the Zhuravlyne lake, springs and wells near village Verkhnia Rozhanka, pools of the Vododilnyi
masiff, riverbed of Stryi and the along-river reservoirs between the villages Zavadavivka and Yavora,
and ponds near the village Dovge.
Key words: Cladocera, Copepoda, mountain part of the Stryi river basin, Ukrainian Carpathians.