INVAZIA GHIDRINULUI – GASTEROSTEUS ACULEATUS LINNAEUS, 1758 ÎN FLUVIUL NISTRU (LIMITELE REPUBLICII MOLDOVA) ŞI FACTORII DETERMINANŢI

Dumitru BULAT, Denis BULAT, Ion TODERAŞ, Nina FULGA Institutul de Zoologie al AŞM

Abstract

THE INVASION OF THREE-SPINED STICKLEBACK – GASTEROSTEUS ACULEATUS LINNAEUS, 1758 IN DNIESTER RIVER (LIMITS OF REPUBLIC OF MOLDOVA) AND ITS DETERINANT FACTORS

Under the intensification of anthropogenic pressure in aquatic ecosystems of Republic of Moldova, most of stenobionte species became threatened with extinction, but some species, potentially high adaptive, contrast, in present demonstrates an evident biological progression, in some hydrobiotops causing a stressed invasive effect. For Dniester River (limits of Republic of Moldova) three-spined stickleback – Gasterosteus aculeatus Linnaeus, 1758 is a good example, after the construction of Novodnestrovsk hydropower (1981) became a multidominate species forming to Soroca city a particularly large local population. In this paper are analyzed bio- ecological peculiarities of three-spined stickleback and are highlighted environmental factors that contributed to taxon invasion in Dniester River (limits of Republic of Moldova). Keywords: bioinvasion, dominate species, ihtiocenosis, anthropogenic factor.