Wittmann 2006
Wittmann 2006
WITTMANN, K.J., 2006: Distribution and invasive potential of the Ponto-Caspian Mysidae (Mysidacea: Crustacea Malacostraca: Peracarida: Mysida). In RABITSCH, W., F. KLINGENSTEIN & F. ESSL (Eds.): Neobiota. From Ecology to Conservation. 4th European Conference on Biological Invasions Vienna (Austria), 27-29 September 2006. BfN Skripten 184: 41, Federal Agency for Nature Conservation, Umweltbundesamt, Vienna.
Open access at http://www.umweltbundesamt.at/fileadmin/site/umweltthemen/naturschutz/neobiota/Tagungsfotos/Neobiota_Bookofabstracts.pdf
Census of Mysidae species in continental waters of central and western Europe in 1985-2005 together with results from material of the Cousteau Expedition 1991, and published data indicate transient or permanent area expansion in eight species, all of which had been subject to intentional stocking for the enrichment of fish food, at any time between 1948 and 1972 in freshwaters of the former Soviet Union. These species showed endemic populations in freshwater of both the Ponto-Azov and the Caspian basin, while the remaining 25 species, dwelling in the diverse basins of the Ponto-Caspian region, were restricted in each case to only one of the two major basins and were dwelling on the average in more saline waters. Among the eight stocked species, six ones showed secondary spread after stocking, while five species showed additional expansions, independently of documented stocking events. Excluding direct effects of stocking, six species are resulting as expansive in freshwater systems under current anthropogenic conditions. Their expansion potential is estimated in this order: Hemimysis anomala, Limnomysis benedeni (Katamysis warpachowskyi, Paramysis lacustris) (P. intermedia, P. ullskyi), whereby the top position of H. anomala may be again more pronounced in brackish water.
The sampling campaign in 2005 gave first records for H. anomala in France, Switzerland, Slovakia, Hungary, Croatia and Serbia; K. warpachowskyi in Croatia and Serbia; and for L. benedeni in Switzerland. The observed advance of P. lacustris and L. benedeni in inland and coastal waters potentially may have adverse effects by out-competing of native species. H. anomala is known as a top invader of freshwaters in continental Europe, and represents a potential threat at ecosystem level by overgrazing of zooplankton.
distribution; neozoa; freshwater; brackish water; bioinvasion
Hemimysis anomala; Katamysis warpachowskyi; Limnomysis benedeni; Mysidae; Paramysis intermedia; Paramysis lacustris; Paramysis ullskyi