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RV Cefas Endeavour 15/13

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Cefas Endeavour (74E9)
Cruise identifier15/13
Cruise period2013-08-03 — 2013-09-03
StatusCompleted
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
PurposeResearch
ObjectivesObjectives

To carry out a groundfish survey of the North Sea as part of the ICES coordinated IBTS, using a standard 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 rosette 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

Narrative

RV Cefas Endeavour sailed from Lowestoft on 3 August 2013 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 75 of the primary stations fished. 6957 biological samples were taken for the primary target species. In addition, 57 elasmobranchs were captured, tagged and released during the survey. RV Cefas Endeavour returned to Lowestoft on 3 September.
Chief scientistBrian F M Harley (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory), Sophy McCully Phillips (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)
ProjectICES International Bottom Trawl Survey
Coordinating bodyInternational Council for the Exploration of the Sea (ICES)
Cruise programmeRV Cefas Endeavour 15/13 cruise programme endeavour15_13.pdf  (0.14 MB) 
Cruise reportRV Cefas Endeavour 15/13 cruise report endeavour15_13.pdf (1.77 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsRV Cefas Endeavour 15/13 cruise track — endeavour15_13trk.pdf (0.07 MB) 
Measurements 
Physical oceanography 
CTD stationsQuantity: number of stations = 74
Description: Surface and bottom seawater collected from 74 stations
CTD stationsQuantity: number of stations = 74
Description: CTD casts
Other physical oceanographic measurementsQuantity: number of recoveries = 3
Description: Recovery of a baited underwater camera frame
Other physical oceanographic measurementsQuantity: number of deployments = 3
Description: A baited underwater camera frame was deployed to video record piscivorous fish in the area
Contamination 
Other contaminant measurementsQuantity: number of stations = 42
Description: Litter collection from the 89 trawls - marine litter was present in 42 stations
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of experiments = 54
Description: Pigment and flow cytometry conducted at 54 CTD stations
Particulate organic matter (inc POC, PON)Quantity: number of samples = 75
Description: Particulate in/organic carbon analysis of seawater conducted at 75 stations
Dissolved organic matter (inc DOC)Quantity: number of experiments = 53
Description: Seawater collected from 53 CTD stations and incubations conducted to determine rate of dissolved organic matter degradation by the natural microbial community
ZooplanktonQuantity: number of deployments = 50
Description: 50 MIK net tows for Jellyfish
BirdsQuantity: activity duration in days = 31
Description: seabird observations
Mammals and reptilesQuantity: activity duration in days = 31
Description: cetacean recordings
Demersal fishQuantity: number of hauls = 89
Description: 75 stations fished with nylon GOV, 14 fished with poly GOV net
TaggingsQuantity: number of specimens = 88
Description: 88 elasmobranchs tagged with Petersen discs
Other biological/fisheries measurementQuantity: number of samples = 7301
Description: biological samples, including otoliths collected for ageing purposes for commercial fish
Geology and geophysics 
GrabQuantity: number of samples = 38
Description: Day grabs for particle sediment analysis
Single-beam echosoundingQuantity: activity duration in days = 31
Description: Fisheries acoustic data were continuously collected at three operating frequencies (38 kHz, 120 kHz and 200 kHz), using the Simrad EK60 split beam sounder