| Country | Sweden | Ecosystem | |
| Locality | Gullmar Fjord | Depth | |
| Introduced | Year Intro. | ||
| Life Stage | juvenile/recruits | unsexed | schyphistoma |
| Quantitative | 60000 | Unit | numbers/m^2 |
| Semi Quantitative | 50000-100000 | Unit | numbers/m^2 |
| Qualitative | extremely abundant | ||
| Year | 1983 - 1983 | Period | 1975-2000 |
| Date | 1983-08-01 00:00:00 - 1983-10-31 00:00:00 | Record Type | field sample |
| Record Type | field sample | ||
| Seasonal | yes | Method | volumetric |
| Remarks | Abundance data based on calculated mean value of the scyphistomae stage from the settling plates during August to October 1983. Bongo nets (60 cm in diameter and 500 micrometer in mesh size) were used to collect ephyrae at a ship speed of 2 to 3 knots at depth 40 to 45 m for 15 minutes. | ||