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Factors of Anthropogenic Impact on the Northern Dvina River Basin. P. 32–40

Версия для печати

Section: Geosciences

UDC

628.394(28) : 343.772

Authors

Novoselov Aleksandr Pavlovich
Northern Branch of Knipovich Polar Research Institute of Marine Fisheries and Oceanography; Arkhangelsk Scientific Centre, Ural Branch of the Russian Academy of Sciences (Arkhangelsk, Russia)
e-mail: novoselov@pinro.ru
Studenov Igor Ivanovich
Northern Branch of Knipovich Polar Research Institute of Marine Fisheries and Oceanography; Arkhangelsk Scientific Centre, Ural Branch of the Russian Academy of Sciences (Arkhangelsk, Russia)
e-mail: studenov@pinro.ru

Abstract

The paper covers the general range of anthropogenic factors having a negative effect on the fish fauna of the Northern Dvina River. Their action is both indirect (through deterioration of fish habitat, food supply and conditions for natural reproduction of commercial species) and direct (through commercial, sport and recreational fishing as well as poaching). The first group of factors includes space-rocket activities (water pollution by combustion products of propellants), timber industry (deforestation in the catchment area, rafting, watercourse pollution by woodworking enterprises) hydraulicking in the channel part of the Northern Dvina River and its tributaries (deterioration of aquatic habitat), activities of agricultural enterprises (eutrophication of the basins due to addition of excessive organic matter) and water transport (water pollution by fuels and lubricants). The second group of factors directly affects the fish by removing them from the basin and thereby reducing their number. These factors include commercial fishing (leading to selection of the best specimen before the spawning season), recreational fishing (overfishing of young whitefish and grayling in the feeding grounds) and unauthorized fishing or poaching (primarily aimed at valuable species of salmonids and whitefish and accompanied by massive destruction of fish of all age groups). The identified anthropogenic factors, which for many decades have been affecting the ecosystem of the Northern Dvina River, together with climatic conditions have shaped the current state of fish resources of the entire basin.

Keywords

Northern Dvina River basin, changes in the fish fauna, impact of space-rocket activities, impact of hydraulicking, influence of timber industry, impact of agricultural activities, influence of water transport, impact of commercial fishing
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