S. V. Statkevich
A. O. Kovalevsky Institute of Marine Biological Research of RAS, Sevastopol, Russia
Abstract
A reduction in the number of narrow-clawed crayfish is determined. The main reasons are changes in the hydrological and chemical water regime and water pollution by industrial, agricultural and household waste. The new species of decapoda -stone shrimp was regis- trated in the Don mouth, whose appearance, probably due to mineralization of the Don delta water. Widespread of allochthonous Dutch crab is noted.
Keywords
mouth, fauna, decapods