Invasion
Invasion Description
None
Geographic Extent
CA/Los Osos Creek, tributary to Morro Bay (1975, Swift et al. 1986); CA/Chorro Creek, tributary to Morro Bay 1975, Swift et al. 1986); CA/Morro Bay, upper tidal areas, to 8 PSU)
Vectors
| Level | Vector |
|---|---|
| Alternate | Canal |
Regional Impacts
| Ecological Impact | Predation | |
| Predation by Ptychocheilus grandis was considered a major threat to a population of anadromous Steelhead (Oncorhynchus mykiss in Chorro Creek, a Morro Bay tributary. A removal program was conducted to reduce the Pikeminnow population (Halligan and Otte 2011). Predation by the Sacramento Pikeminnow may have also led to the extinction of the Tidewater Goby in Morro Bay (Lafferty et al. 1999). | ||
| Economic Impact | Fisheries | |
| A removal program was conducted to reduce the Pikeminnow population in Chorro Creek (Halligan and Otte 2011) and is still continuing (Morro Bay National Estuarine Research Program 2017). | ||