Invasion
Invasion Description
1st Record: US 101, bridge, Klamath/CA/Klamath River, near the mouth (1951, Coots 1956)
1st watershed record: CA/Copco Lake (1946, Coots 1956; Dill and Corone 1997; Moyle 2002). Four fish were caught in the reservoir in 1946,, and by 1956, were found from the Oregon border to the mouth of the river (Coots 1956).
Geographic Extent
US 101, bridge, Klamath/CA/Klamarh River, near the mouth (1951, Coots 1956)
Vectors
| Level | Vector |
|---|---|
| Probable | Fisheries Intentional |
Regional Impacts
| Ecological Impact | Predation | |
80% of Yellow Perch fingerlings in a sample form the Klamath River contained Chinook Salmon fingerlings ((Oncorhynchus tshawytscha) (Dahl 1979). They are also predators on native minnows and suckers (some endangered) in the upper Klamath basin (Moyle 2002). Predation impacts on Chinook Salmon are probably low, because of the perch's low abundance, but young Chinook Salmon use the same backwater areas as Yellow Perch (Dahl 1979). | ||
| Economic Impact | Fisheries | |
| Yellow Perch are a desirable food-fish, but are prone to stunting in small lakes and ponds. In the Klamath River, they support a minor, mostly incidental fishery (Coots 1956; Moyle 2002). | ||