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As a result of our research, 9 species and 1 subspecies of shell mollusks
belonging to 2 families and 4 species were found in the biotopes of the ―Shurkul‖
reservoir [2] .
In addition, in the course of our research, the density of the shell mollusks was
specially studied. If the species Sinonodonta and Collepterum of the Unionidae
family meet with a frequency of 1-2 pieces per 1 m2, then the species Corbicu cor.
C.purpurea, Corbiculina Tibetensis of the corbicula group of the Sinonodonta
family occur at a frequency of 2–4 pieces per m2.
The difference in the density of shell mollusks, ecological and biological
features of mollusks. It is associated with the laws of interbiotics propagation.
With the creation of the ―Shurkul‖ reservoir, the living conditions and
reproduction of shell mollusks have improved. When forming the fauna of shell
mollusks of the reservoir, this process influenced the development of fish farming
and the climatization of fish to this region.
The water temperature of the reservoir primarily affects the mass of water and
the state of the atmosphere, and then the temperature and amount of groundwater,
sources of saturation and other factors of water flowing into the reservoir [3].
The water temperature of the reservoir is important in the implementation of
the water filtration process in the distribution and feeding of the thesauruses of
Sinonodonta gibba, S. Orbicularis and other shell mussels. The temperature and
glaciation of the water of the Shurkul reservoir is of great importance in the
national economy, as well as in the life of the organic world of the shell mussels. In
the course of research, we studied such inhabitants of the Shurkul reservoir as
peloreophils Sinonodonta gibba, S. Orbicularis, S. Puerorum, Corbicula cor., C.
Purpurea, Corbiculina tibetensis, and the ecological group of riophiles Collepterum
cyreum sogdianum. In the reservoir, species of the ecological group of riophiles are
also common by 14% and peloreophils by 86%.
As a conclusion, we can say that we found 6 species and 1 subspecies of the
shell mollusks of the Shurkul reservoir related to 2 families and 4 species.
Summary
In the biotopes of the ―Shurkul‖ reservoir located in the lower
reaches of the Zarafshan River, 6 species and 1 subspecies of shell mollusks have
been identified. In the reservoir, species of the ecological group of riophiles are
also common by 14% and peloreophils by 86%.
Keywords: Water temperature, sources of saturation, peloreophils, riophiles,
Sinonodonta gibba, S. Orbicularis, S. Puerorum, Corbicula cor., C. Purpurea,
Corbiculina tibeyensis, Collepterum cyreum sogdianum, species composition, fish
distribution, mollusk density.
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