| Plattform Platform |
Reise-Nr. Cruise-No. |
Zeitraum Period |
Projekt Project |
Arbeitsgebiet Working area |
|---|---|---|---|---|
| Solea | 827 | 04.10.2023 - 24.10.2023 | BIAS GERAS |
Kattegat ICES-Subarea 22 (also ICES-subarea IIIc) Baltic Sea ICES-Subarea 21 ICES-Subarea 24 (part of ICES-subarea IIId) ICES-Subarea 23 (also ICES-subarea IIIb) Arkona Basin |
| Fahrtleiter Chief Scientist | Institut Institute | Auslaufhafen Port of departure | Einlaufhafen Port of return | Stationskarte Station map | Schiffsroute Trackchart |
|---|---|---|---|---|---|
| Schaber Matthias | Thunen-Institut fur Seefischerei | Kiel | Rostock |
Ziel der Reise / Objectives of Cruise:
The cruise was part of an international hydroacoustic survey providing information on stock parameters of small pelagics in the Baltic Sea, coordinated by the ICES Working Group of International Pelagic Surveys (WGIPS) and the ICES Baltic International Fish Survey Working Group (WGBIFS). Further WGBIFS contributors to the Baltic survey are national fisheries research institutes of Sweden, Poland, Finland, Latvia, Estonia and Lithuania. FRV ?Solea? participated for the 36th time. The survey area covered the western Baltic Sea including Kattegat, Belt Sea, Sound and Arkona Sea (ICES Subdivisions (SD) 21, 22, 23 and 24). The survey effort was comparable to 2022. The following objectives were planned for SB827: - Hydroacoustic measurements for the assessment of small pelagics in the Kattegat and western Baltic Sea including Belt Sea, Sound and Arkona Sea (ICES Subdivisions 21, 22, 23 and 24) - (Pelagic) trawling according to hydroacoustic registrations - Hydrographic measurements on hydroacoustic transects and after each fishery haul - Identification and recording of species- and length-composition of trawl catches - Collection of biological samples of herring, sprat and additionally sardine, European anchovy and cod for further analyses - Comparison of day and night-time transects with FRV ?Clupea? in ICES Subdivision 23 Altogether, 1168 nautical miles of hydroacoustic transects were covered. For species allocation and identification as well as to collect biological data for an age stratified abundance estimation of the target species herring and sprat, altogether 48 fishery hauls were conducted. Vertical hydrography profiles were measured on 67 stations.
Messungen / Measurements
| Institut Institute |
Wissenschaftler Scientist |
Anzahl Number |
Einheit Unit |
Typ der Messungen Type of measurements |
Kommentar Comments |
Daten im DOD Data in DOD |
|---|---|---|---|---|---|---|
| VTISF | Schaber Matthias | 1 | tracks | B28 Acoustic reflection on marine organisms |
Hydroacoustic data were recorded with a Simrad EK80 scientific echosounder with hull-mounted 38, 70, 120 and 200 kHz transducers at a standard ship speed of 10 kn. Total transect length 1168 nautical miles. | no |
| VTISF | Schaber Matthias | 48 | hauls | B90 Other biological / fishery measurements |
For species allocation and identification as well as to collect biological data for an age stratified abundance estimation of the target species herring and sprat, altogether 48 fishery hauls were conducted with a pelagic trawl. | no |
| VTISF | Schaber Matthias | 66 | stations | H00 Stations |
- | yes |
| VTISF | Schaber Matthias | 66 | stations | H10 CTD-Stations |
- | yes |
| VTISF | Schaber Matthias | 67 | profiles | H10 CTD-Stations |
Vertical hydrography profiles of Temperature, Salinity and Oxygen were measured on 67 stations | no |