RV Pelagia PE123

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Pelagia (64PE)
Cruise identifierPE123
Cruise period1998-09-02 — 1998-09-18
Port of departureVigo, Spain
Port of returnHet Horntje, Netherlands

To study the distribution and activity of sea floor communities off NW Spain and the sediment concentrations of organic matter and biomarkers. Revisited 3 stations: the 2200m OMEX stations, the abyssal plain off La Coruna and Galicia Bank. Instruments that had been moored on a previous cruise were retrieved and re-deployed. Sediment samples at these and other locations were collected for spatial and temporal pigment biomarker variation. Visited a 4800m deep location on the Porcupine abyssal plain, temporal variation of the food supply and activity of the abyssal benthic community. A high resolution time series of measurements compiled of water column property and benthic community parameters. The respiratory activity of the benthic community is measured in-situ by bottom landers. 5 bottom landers deployed and took sediment and bottom-water samples. 2 hauls were made with a underwater video-trawl which filmed the sea floor and yielded tissue samples of holothurians for biochemical parameter analysis.

At each station a CTD profile of the water column and bottom water samples were collected for oxygen determination. 10 litres of bottom water were filtered for phytopigment analysis. Sediment samples were collected with a multi-corer for the analysis of: phytopigments, oxygen porewater profiles and porosity. Sediment community oxygen consumption (SCOC) was measured in-situ with the ALBEX bottom lander. The ALBEX lander carries a sediment trap with built-in fluorometer. Megafauna was collected and the small-scale topography of the sea floor was recorded with a video-Agassiz trawl.
Chief scientistGerard C A Duineveld (Royal Netherlands Institute for Sea Research)
Cruise reportRV Pelagia PE123 cruise report pelagia123.pdf (0.14 MB) 
Track chartsRV Pelagia PE123 cruise track — pelagia123trk.pdf (0.07 MB) 
Physical oceanography 
CTD stationsQuantity: number of profiles = 8
Description: CTD, depth range: 2261-4908m
Chemical oceanography 
Other chemical oceanographic measurementsQuantity: number of deployments = 1
Description: Aquaflow, depth range: surface.
Biology and fisheries 
Sediment trapsQuantity: number of deployments = 1
Description: PPS3 sediment trap, depth range: 4908m
Geology and geophysics 
DredgeQuantity: number of hauls = 4
Description: Agassiz-video trawl, depth range: 2446-4909m
Core - soft bottomQuantity: number of cores = 2
Description: circular box-corer, depth range: 1153-1707m
Core - soft bottomQuantity: number of cores = 12
Description: multi-corer, depth range: 2266-4926m
Core - soft bottomQuantity: number of cores = 1
Description: square box-corer, depth range: 1103-1310m
Bottom photographyQuantity: number of hauls = 4
Description: Agassiz-video trawl, depth range: 2446-4909m
In-situ seafloor measurement/samplingQuantity: number of deployments = 2
Description: recruitment lander, depth range: 780m
In-situ seafloor measurement/samplingQuantity: number of deployments = 7
Description: ALBEX bottom lander, depth range: 2262-4909m
Data held at BODC Get data
Discrete samples 
2  Bottom LanderOther fluxes between the bed and the water column
Sedimentation flux of pigments in the water column
8  CTD frame plus rosette samplerTransmittance and attenuance of the water column
Temperature of the water column
Dissolved oxygen parameters in the water column
Salinity of the water column
Density of the water column
Chlorophyll pigment concentrations in water bodies
5  MulticorerPhaeopigment concentrations in sediment
Chlorophyll pigment concentrations in sediment