Страна | Germany | экосистема | Baltic Sea |
Местонахождение | Western Baltic Sea (ICES Subdivision 22 and 24) | Depth | |
интродуцированный | Year Intro. | ||
Стадия жизни | juvenile/recruits | unsexed | |
Quantitative | 0 | Unit | numbers/m2 |
Semi Quantitative | 0 | Unit | numbers/m2 |
Qualitative | absent | ||
год | 2002 - 2002 | Period | 2001-present |
Дата | 01/04/02 - 31/05/02 | Record Type | field sample |
Record Type | field sample | ||
Seasonal | not specified | Method | volumetric |
Remarks | Life stages of the species collected (fish larvae and juveniles). Fish larvae were caught with a bongo net (60 cm in diameter, with 0.5 mm mesh size on the outer net and 0.335 mm on the inner net). At each of the 57 stations, 2 oblique hauls at a speed of 3 knots were carried out up to 2 m above the bottom. The samples were fixed on board in 4% formaldehyde. 'Flow-through counter' measurements made possible the calculation of fish volumes. |