Abstract
The Ponto-Caspian amphipod Echinogammarus trichiatus (=Chaetogammarus trichiatus) was found for the first time in Slovakia (22 August 2007, near Bratislava) and in Hungary (15 September 2009, near Rajka). This range expansion is probably a result of a recent downstream spread of the Upper-Danubian populations. Our records indicate that the species can inhabit artificial ripraps as well as near-natural gravel banks, and co-occurs with its relatives already present. Suitable habitats can be found all along the Middle-Danube, so further spread of the species is anticipated.
Highlights
The invasion of Ponto-Caspian fauna elements has been one of the most striking changes in the macrofauna of large European rivers in recent times (Bij de Vaate et al 2002)
In this paper we report on the appearance of a further species, Echinogammarus trichiatus (Martynov, 1932)
On 22 August 2007, 28 specimens of E. trichiatus were collected on the right bank of the Danube near Bratislava in the course of the “Joint Danube Survey 2” using a “kick and sweep” net from the littoral zone (
Summary
The invasion of Ponto-Caspian fauna elements has been one of the most striking changes in the macrofauna of large European rivers in recent times (Bij de Vaate et al 2002). Amphipod crustaceans are among the most prominent groups of these newcomers; there are at least 12 Ponto-Caspian species involved all over Europe (Eggers and Martens 2001, 2004; Bij de Vaate et al 2002), some of which are considered to be among the most successful invaders.
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