Deutsches Ozeanographisches
Datenzentrum
Inventur der Tridens II-Reise North Sea Herring Ac (DOD-Ref-No.20150464)
Inventory of Tridens II Cruise North Sea Herring Ac (DOD-Ref-No.20150464)
Plattform Platform |
Reise-Nr. Cruise-No. |
Zeitraum Period |
Projekt Project |
Arbeitsgebiet Working area |
---|---|---|---|---|
Tridens II | North Sea Herring Ac | 22.06.2015 - 17.07.2015 | NHAS |
North Sea |
Fahrtleiter Chief Scientist | Institut Institute | Auslaufhafen Port of departure | Einlaufhafen Port of return | Stationskarte Station map | Schiffsroute Trackchart |
---|---|---|---|---|---|
Fassler Sascha | IMARES, Wageningen UR, Institute for Marine Resources and Ecosystem Studies, Texel | Scheveningen | Scheveningen |
Ziel der Reise / Objectives of Cruise:
The objective was to carry out an hydro acoustic survey defining the abundance of herring and sprat in the North Sea, in co-operation with the institutes of Norway, Scotland, Denmark, and Germany. Calibration of the echosounder in a sheltered area, at Loch Eriboll, Scotland 58?30N - 004?41W. The first week of the whole 4 week survey period was used for calibration of the acoustic equipment in a sheltered location in Loch Eriboll. After successfully calibrating all acoustic systems, Tridens sailed to Aberdeen. Departure from Aberdeen harbour on Monday 29 June 8:00 UTC. At 16:15 UTC we took our first CTD and started the survey. We are now at 58.18N - 2.34W heading east. The first five days we covered the 58.18, 58.06, 57.49 and the 57.37 transects. There was herring on all three transects although not in overwhelming quantities. On friday 3 July we were at 57.37N-16W, almost at the western end of the transect. So far 8 hauls were carried out. Haul 1-4 and 7-8 consisted of 100% herring. Haul five consisted of 70% sprat and 30% herring. Haul 6 contained 5% Norway pout. Total amount of all catches was between 1700 and 7000 kg.
Messungen / Measurements
Institut Institute |
Wissenschaftler Scientist |
Anzahl Number |
Einheit Unit |
Typ der Messungen Type of measurements |
Kommentar Comments |
Daten im DOD Data in DOD |
---|---|---|---|---|---|---|
IMARES | Fassler Sascha | 20 | hauls | B14 Pelagic fish |
. | no |
IMARES | Fassler Sascha | 3216 | km | B28 Acoustic reflection on marine organisms |
. | no |
IMARES | Fassler Sascha | 44 | profiles | H10 CTD-Stations |
. | no |