RV Cefas Endeavour 18/16

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Cefas Endeavour (74E9)
Cruise identifier18/16
Cruise period2016-08-08 — 2016-09-07
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom

To carry out a groundfish survey of the North Sea as part of the ICES coordinated IBTS, using a hybrid GOV trawl in order to obtain information on:
a) Distribution, size composition and abundance of all fish species caught.
b) Age - length distribution of selected species.
c) Distribution of fish in relation to their environment.
d) Distribution of macrobenthos and anthropogenic debris.
e) Surface and bottom temperature and salinity data using CTD cast and Niskin Bottle.
f) Length weight & maturity information using individual fish measurements, in support of the EU Data Regulation.
g) To collect marine litter from the trawl

RV Cefas Endeavour sailed from Lowestoft on 8 August 2016 to begin the Quarter 3 IBTS North Sea Groundfish Survey for the UK. A valid GOV trawl haul was successfully completed at all of the 76 primary station positions. Surface and bottom salinity samples and a water column CTD profile were taken at 51 of the primary stations fished. A total of 9450 biological samples were taken for the primary target species. In addition, a total of 20 elasmobranchs were captured, tagged and released during the survey. RV Cefas Endeavour returned back to Lowestoft on 7 September.
Chief scientistBenjamin Hatton (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)
Coordinating bodyInternational Council for the Exploration of the Sea (ICES)
Cruise programmeRV Cefas Endeavour 18/16 cruise programme endeavour18_16.pdf  (0.86 MB) 
Cruise reportRV Cefas Endeavour 18/16 cruise report endeavour18_16.pdf (2.34 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificNorth Sea (ICES area IV)
Track chartsRV Cefas Endeavour 18/16 cruise track — endeavour18_16trk.pdf (0.03 MB) 
Physical oceanography 
CTD stationsQuantity: number of stations = 72
Description: 72 CTD casts; 51 standard casts and 21 additional casts with ESM2 profiler only
CTD stationsQuantity: number of stations = 51
Description: Salinity samples collected at surface and bottom using niskin at 51 stations
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of experiments = 57
Description: Pigment and flow cytometry conducted at 56 stations
Demersal fishQuantity: number of hauls = 95
Description: 76 stations fished with hybrid GOV, two hauls completed for Scotland and 14 additional tows.
TaggingsQuantity: number of specimens = 20
Description: 20 elasmobranchs tagged with Petersen discs
Other biological/fisheries measurementQuantity: number of samples = 9450
Description: 9450 biological samples, including otoliths collected for ageing purposes for commercial fish
Other biological/fisheries measurementQuantity: number of samples = 57
Description: Suspended Particulate Matter (SPM) analysis of seawater was conducted across 57 stations
Data held at BODC 
Discrete samples 
148  Sample taken from ship's non-toxic supply