Neogobius melanostomus

\"Where introduced, N. melanostomus competes aggressively for food and habitat with native fish species [...]\"; \"“In the Baltic Sea, N. melanostomus primarily competes with the commercially important flounder Platichthys flesus L. 1758, evidenced by strong similarities in diet and a negative correlation between P. flesus and N. melanostomus abundance (Karlson et al., 2007). Neogobius melanostomus also restricts habitat utilization and therefore food availability to P. flesus (Karlson et al., 2007). \"; \"Adult Neogobius melanostomus aggressively defend spawning sites and will occupy prime spawning areas, preventing native species from utilising these sites.\"

\"The round goby negatively affects the recruitment of native fishes in the Great Lakes. For example, Chotkowski and Marsden (1999) showed in laboratory studies that round gobies fed on eggs and fry of lake trout, Salvelinus namaycush. Field studies confirmed that round gobies feed on eggs of lake sturgeon, Acipenser fulvescens.\"; \"Where introduced, N. melanostomus [...] and preys on native mussels, including several species that are endangered or of conservation concern.\"; \"Mussel species are affected both through direct predation and indirectly through reduced availability of native fish hosts required by some mussel species for their glochidia larvae (Poos et al. 2010).”

“Round goby predation on grazing invertebrates enhanced algal biomass as evidenced by increased chlorophyll a concentrations in a field study (Kuhns and Berg 1999).”

\"Three-spined stickleback Gasterosteus aculeatus L. 1758 abundance in the Gulf of Gdansk was also negatively correlated with N. melanostomus abundance, indicating a shift from pelagic to benthic forage fishes as N. melanostomus populations increase in size (Corkum et al., 2004).”

“The numbers of native fish species have declined in areas where the Round Goby has become abundant (Crossman et al., 1992). This species has been found to prey on darters, other small fish, and Lake Trout eggs and fry in laboratory experiments. They also may feed on eggs and fry of sculpins, darters, and Logperch (Marsden and Jude, 1995) and have also been found to have a significant overlap in diet preference with many native fish species.\"