| Country | United States (contiguous states) | Ecosystem | |
| Locality | Lake Abert, Oregon | Depth | 2.5 m |
| Introduced | Year Intro. | ||
| Life Stage | adult | mixed | |
| Quantitative | 1000 | Unit | numbers/m^2 |
| Semi Quantitative | 100-1000 | Unit | numbers/m^2 |
| Qualitative | common | ||
| Year | 1981 - 1981 | Period | 1975-2000 |
| Date | 1981-10-16 00:00:00 - 1981-10-16 00:00:00 | Record Type | field sample |
| Record Type | field sample | ||
| Seasonal | Method | random sampling | |
| Remarks | Average abundance for this sampling was less than 1000 individuals/ m-2. | ||