Current distribution of crayfish in water bodies on Braslav territory, Vitebsk region, Belarus

even populations of noble crayfish Astacus astacus recorded during the survey of thirty-eight water bodies (33 lakes, 5 rivers) of Braslav territory. All the populations, except one in the lake Belyani, are in the poor state. The population of noble crayfish in the river Usveyka was recorded in 2013, but since 2017, no crayfish recorded in the river. The distribution of noble crayfish on Braslav region territory is highly fragmented. Narrow-clawed crayfish Pontastacus leptodactylus is recorded in the small number of lakes (8), three of which can be considered as promising commercial lakes – Rozhevo, Raukety, Bolta. Noble crayfish recorded in 18 % surveyed water bodies, narrow-clawed crayfish in 21 %. No crayfish recorded in 61 % of studied water bodies. The water bodies of Braslav region are promising places for the preservation of noble crayfish. The strategy for the preservation of noble crayfish in this region should be constant creation of new populations.

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