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Information × Registration Number 0216U007581, 0116U008125 , R & D reports Title Evaluation of Species Composition and Testing of Resource Potential of Crawfish in Prupyat River Basin popup.stage_title Head Harbar Alexander Vasyliovych, Registration Date 23-12-2016 Organization Zhytomyr State University named after Ivan Franko popup.description2 As a result, a comprehensive study dedicated to the issue of species composition and resource potential of crayfish in the basin of the Pripyat River, proved the presence of three species with sympatryc areas: Astacus astacus, A. leptodactylus and A. angulosus. Based on geographical variation of Aat-1 locus allele frequencies , we can conclude genetic heterogeneity of species A. angulosus. This fact is also confirmed by genetic differentiation of populations, designed by M. Nei index. The results there is a clear alozyme difference of A. leptodactylus and A. angulosus. Because these species are sympatric, the mere presence of genetic differences is evidence of reproductive isolation and species independence. Despite the significant age, sex and geographic variability of different species are well on the set of standard morphometric parameters. However, any of them are close to species of diagnostic doubt. In Ukraine A. astacus is endangered species, with habitat declining. In Pripyat basin presented a small isolated population in the district of Kremenets Ternopil region, with tendency to disappear. The most numerous are undoubtedly A. angulosus. A. leptodactylus is also quite large, but are less common. A. astacus is traditionally few. Product Description popup.authors Костюк Віталій Степанович Межжерін Сергій Віталійович popup.nrat_date 2020-04-02 Close