The Ponto-Caspian amphipod Obesogammarus obesus (Sars, 1894) arrived the Rhine River via the Main-Danube Canal
نویسنده
چکیده
The Ponto-Caspian amphipod Obesogammarus obesus (Sars, 1894) was first recorded in the Rhine River near Koblenz, Germany in October 2004. Additional records of small numbers of O. obesus from the same location in 2005 and 2006 indicate that this alien species may have become established in the central section of the Rhine River. Ship transport via the Main-Danube Canal, connecting the Danube basin (Black Sea catchment area) and the Rhine basin (North Sea catchment area), is the plausible mode of introduction of O. obesus to the site at Koblenz. The possible ecological effects of O. obesus in the Rhine River remain uncertain and require further study. Based on the invasion history of other Ponto-Caspian amphipods, it can be speculated that O. obesus will extend its distribution within the German and European river and canal systems in the near future.
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