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Long-term changes in planktonic rotifer assemblages in the ponds of ”Lasy Janowskie” Landscape Park

100%
Demetraki-Paleolog A., Kolejko M., Sender J.
Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego
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2015
|
vol. XII
2
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Biotechnological bases of organization of industrial crayfish farm in Ukraine

88%
Marenkov O.
World News of Natural Sciences
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2020
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vol. 28
1-12
EN
Crayfish are valuable invertebrates that are constantly in great demand in all corners of the Earth. Breeding crayfish is not only large-scale production as it can also be arranged in small volumes using pools and installations of closed water supply. Cultivation of crayfish generates profit after a certain period of time, if all biotechnological norms of cultivation are considered. Cultivation of crayfish is a rather promising production, in which it is possible to obtain from 200 to 300% of stable profits during 3–4 years old. The article gives an overview of the technology of growing crayfish, taking into account the characteristics of farming in Ukraine. The basic biotechnological stages of the establishment and operation of the economy are determined, calculations of capital expenditures for the establishment of the economy are presented and the profitability of the project for the production of freshwater crayfish is determined. Cultivation of river crayfish makes it possible to obtain environmentally friendly products that can compete on the markets of Ukraine or EU countries. Also, this way of growing crayfish allows getting stocking material for release in natural reservoirs in order to restore the populations of river crayfish.
3
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Floristic diversity of fish ponds in Sosnowica region

75%
Sender J., Grzywna A.
Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego
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2015
|
vol. XII
4
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Cysts of Chrysophyceae from King George Island (South Shetland Islands, Antarctica)

75%
Mrozińska T., Olech M., Massalski A., Mrozińska T., Olech M., Massalski A.
Polish Polar Research
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1998
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vol. 19
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issue 3-4
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