The work presents the assessment of unaccounted withdrawal of fluvial anadromous and river fish species in the inland fisheries of the Astrakhan region, which is composed of despoliations of commercial catches, poaching and amateur fishing. Methodology decisions that are developed at the CaspNIRKh were the calculation basis of the unaccounted fishing withdrawal and assessment of the impact of amateur fishing on the aquatic bio-resources. The article shows the evaluation method of volumes of poaching fish withdrawal. It is found that the main objects of the unaccounted withdrawal were more valuable fishing species (roach, pike perch, catfish, carp, bream, and pike). The despoliation of commercial catches made 28% on the average. One year minimum poaching fish withdrawal in the region, using the example of 2015, was 7.94 thousands of tones and 19% from commercial catch, and 20-30% of fish catching, harvested by the amateur fishing. The work presents the pressing of unaccounted withdrawal of fluvial anadromous and river fish species on stocks. On the back of decrease of stocks and commercial catches of fluvial anadromous and river fish species, development scales of all directions of unaccounted withdrawal in the Astrakhan region disturb all preconditions for reconstruction and growth of fish number.

The nature and methods of fishing become extremely important in inland waters with a limited raw material base and sharply changing reproductive capacity of fish herds under the influence of habitat. Currently, 19 species of semi-passable and river fish are used in the Astrakhan region. All these species live in a single water area and practically do not create local single-species clusters. The modern resource base of semi-navigable and river fish, on which industrial fishing in the Astrakhan region is based, is limited. Stocks of a number of fish species are declining – roach, tench, pike. Stocks of others are stagnating at a low level – bream, catfish. At the same time, the annual increase in fishing intensity due to the commissioning of new fishing sites does not compensate for the decrease in commercial catches, which indicates the tense state of the fishing resource base in the Astrakhan region.