Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Tridens II	IBTS 2004-1	26.01.2004 - 27.02.2004	IBTS	North Sea

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Heessen Henk J.L.	Rijksinstituut voor Visserijonderzoek, Netherlands Institute for Fisheries Research	Ijmuiden	Ijmuiden

Ziel der Reise / Objectives of Cruise:

Objectives and brief narrative of cruise enter sufficient information about the purpose and nature of the cruise so as to provide the context in which the reported data were collected. The cruise was part of the ICES coordinated International Bottom Trawl Survey, which is carried out annually in February since 1965. The survey covers the entire North Sea, the Skagerrak and the Kattegat.In each ICES rectangle (see cruise map) one 30 min. haul is made with a standard bottom trawl (GOV-trawl) to provide indices of recruitment of the most important commercial fish species (cod, haddock, whiting, Norway pout, saithe, herring, sprat and mackerel). At the same time information is collected on changes in distribution of all fish species caught. During the night herring larvae are sampled with a fine meshed MIK plankton net. At each GOV trawling station also a CTD profile is made. All fish data are stored in the ICES IBTS database which is kept at the ICES Secretariat in Copenhagen.

Messungen / Measurements