General Impact
Introduced bass usually affect populations of small native fishes through predation, sometimes resulting in the decline or extinction of such species (Minckley 1973, in Fuller, 1999). Studies have shown that largemouth bass are capable of displacing native species, even predatory species such as northern pike.(USGS-CERC, 2004)
Location Specific Impacts:Poland 
Competition: Severeal species of native fish are affected.
The scale of impact of this species is weak
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