RV Dana 02/2013

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Dana (26D4)
Cruise identifier02/2013
Cruise period2013-02-01 — 2013-02-18
Port of departureHirtshals Havn, Denmark
Port of returnHirtshals Havn, Denmark
ObjectivesThe survey is part of the 1st quarter International Bottom Trawl Survey (IBTS) in the North Sea, which is coordinated by the ICES International Bottom Trawl Survey Working Group and has been conducted with standard fishing gear in the 1st quarter since 1983. The IBTS aims to provide ICES assessment and science groups with consistent and standardised data for examining spatial and temporal changes in
(a) the distribution and relative abundance of fish and fish assemblages
(b) of the biological parameters of commercial fish species for stock assessment purposes.

The main objectives in the 1st quarter IBTS are:
- To determine the distribution and relative abundance of pre-recruits of the main commercial species (cod, haddock, whiting, Norway pout, saithe, herring, sprat, and mackerel) with a view of deriving recruitment indices
- To monitor changes in the stocks of commercial fish species independently of commercial fisheries data
- To monitor the distribution and relative abundance of all fish species and selected invertebrates
- To collect data for the determination of biological parameters for selected species
- To collect hydrographical and environmental information
- To determine the distribution of in particular herring and sprat larvae

Dana left Hirtshals on Friday 1 February at 13:00 local time. Poor weather conditions caused a delay in the sampling during the 1st cruise leg. The vessel stayed in the port of Esbjerg on Friday 8 February from 10:45 to 14:15 for the scheduled exchange of scientific staff and crew. Again, strong winds did not allow sampling during some periods of the 2nd cruise leg. Dana returned to Hirtshals on Monday 18 February at 10:30 local time after most the planned work had been accomplished.
Chief scientistHelle Rasmussen (Technical University of Denmark, National Institute of Aquatic Resources), Kai Wieland (Technical University of Denmark, National Institute of Aquatic Resources)
ProjectICES International Bottom Trawl Survey (IBTS)
Coordinating bodyInternational Council for the Exploration of the Sea (ICES)
Cruise reportRV Dana 02/2013 cruise report dana_02_2013.pdf (0.34 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsRV Dana 02/2013 cruise track — dana_02_2013trk.pdf (0.14 MB)