国 | Germany | エコシステム | Baltic Sea |
現場 | Western Baltic Sea (ICES Subdivision 22 and 24) | Depth | |
導入された | Year Intro. | ||
生命段階 | juvenile/recruits | unsexed | |
Quantitative | 0 | Unit | number |
Semi Quantitative | 0 | Unit | number |
Qualitative | absent | ||
年 | 1996 - 1996 | 周期 | 1975-2000 |
データ | 01/06/96 - 30/06/96 | Record Type | field sample |
Record Type | field sample | ||
Seasonal | not specified | 方法 | volumetric |
意見 | A visitor species. 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. |