Editing Ruffe (section)

===Ecological effects===
The introduction of the ruffe seems to be causing much damage to [[Lake Superior]]. This fish's invasion of the lake has not only caused problems with space, but competing with other fish for food supply. The ruffe has similar eating habits, but an accelerated reproduction rate compared to other similar fish. Therefore, having more ruffe in the water leads to less food for other fish. This fish is unique in its ability to adapt in many [[habitat]]s and [[temperature]]s, resulting in success despite such factors as [[Climate change (general concept)|climate change]] or other biological changes. The ruffe also has an exceptional ability to detect water vibrations through organs called [[neuromasts]]. This trait both aids the ruffe in finding food and gives the ruffe an edge in avoiding predators. These develop into more advanced and sensitive organs as the fish matures; of note, the [[perch]]'s neuromasts weaken as it matures. The ruffe has the potential to overtake many other fish species, and consequently damage the Great Lakes' [[ecosystem]]. Without concerted intervention, the ruffe have the potential to ruin Lake Superior.<ref>{{Cite web|title = Ruffe (''Gymnocephalus cernua'') – FactSheet|url = https://nas.er.usgs.gov/queries/factsheet.aspx?SpeciesID=7|website = nas.er.usgs.gov|access-date = 2016-01-28}}</ref>

The ruffe is the first invasive species to have been classified as a nuisance by the Non-indigenous Aquatic Nuisance Prevention and Control Program. Along with it being the most populous fish in the St. Louis river basin, it has disrupted ecosystems all across the Great Lakes. The invasion was first noticed in the 1980s by the DNR. They suggest that the fish was introduced to the lake via [[ballast water]] that was dumped into the [[Duluth, Minnesota]], harbor by anchored freight ships. Ever since the ruffe were detected, studies have shown that the ruffe and the [[yellow perch]] are closely related and are quickly becoming rivals. The ruffe and perch are competing in numbers and are also competing for food; this is a match that the ruffe are winning.