“…One of the latest occurrences of the species in new areas comes from Switzerland, River Rhine, the harbor of Kleinhüningen (Kalchhauser et al, 2013). Such an expansive dispersion of N. melanostomus is associated with the species' tolerance of various range of environmental conditions (Moskal'kova, 1996;Charlebois et al, 1997;Young et al, 2010), a wide range of diet and flexibility in feeding behaviour (Shemonaev and Kirilenko, 2009;Števove and Kováč, 2013), aggressive behaviour during reproduction period, high reproduction rate and parental care, larger body size compared with other benthic species (Charlebois et al, 1997;Jude, 1997), as well as flexibility in life-history traits (Gutowsky and Fox, 2012). Indeed, previous studies focused on invasive N. melanostomus have revealed that this species has the capability to generate forms with life-history traits that are different between its native populations and its non-native populations (MacInnis and Corkum, 2000;L'avrinčíková and Kováč, 2007;Kováč et al, 2009).…”