RV Cefas Endeavour 05/21

Cruise plan

Cruise Info. 
Ship name (ship code)RV Cefas Endeavour (74E9)
Cruise identifier05/21
Cruise period2021-03-15 — 2021-04-03
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom

1) To carry out a beam trawl survey of the Celtic Sea, South Western Approaches and Western Channel. Deploying standardised 4m beam trawls (x2) and water column profiler. Station selection will be based on a fully random stratified approach with gears deployed at each station where appropriate.
Catches from the trawls will be processed to obtain information on:
• Distribution, size composition and relative abundance of fish, cephalopods, and benthic invertebrates.
• Biological parameters of selected species.
The data obtained from processing the trawl catches is collected in support of the UK fisheries data collection (previously the EU DCF) and will be submitted.
2) To collect fisheries acoustic data at three operating frequencies (38, 120 & 200 kHz) and multibeam data continuously throughout the survey.
3) Collect information on;
a. Distribution of macrobenthos
b. Distribution and classification of anthropogenic debris.
c. Distribution of fish in relation to their environment.
4) To collect full depth, conductivity, temperature and depth profiles at each trawl station alongside surface and near-bottom water samples.
5) To continuously log sub-surface (3m) salinity, temperature, fluorometry and other environmental data using the Ferrybox.
6) To record details of surface sightings of any marine mammals, sea turtles and large pelagic fish, and record observations on jellyfish aggregations.
7) Collect water samples for caesium & tritium analysis under SLA22.
8) To tag and release specimens of Plaice, Pleuronectus platessa as part of a Cefas plaice tagging project.
9) To collect biological samples and information for Lesser weever, Echiichthys vipera as part of a Cefas study on species growth and biology.
10) To carry out fieldwork testing of new motion-compensating marine balance(s) provided by Lorrimar Weighing Ltd with a view to purchasing replacements for the current POLS balances.
11) Collect samples of selected benthic invertebrate species for analysis of contaminants.
12) To tag and release specimens of various commercially exploited skates (Rajidae) and other select elasmobranches.
13) Collect specimens of selected species for ID purposes as well as length-weight measurements where still required.
14) All diadromous species (including allis shad alsoa alsoa, twaite shad alsoa fallax and lampreys (Petromyzontidae)) found dead on capture are to be frozen and returned to the lab for analyses, marking samples with the survey, station and date to support DiadES project.
15) Collect a vertical ring net sample at the west Gabbard smartbuoy, contributing to the Lifeform project (Defra) as part of the UK monitoring network for zooplankton.
Chief scientistIan David Holmes (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)
Cruise programmeRV Cefas Endeavour 05/21 cruise programme endeavour05_21.pdf  (0.32 MB) 
Ocean/sea areas 
GeneralEnglish Channel
Celtic Sea
SpecificCeltic Sea, South Western Approaches (ICES Division VIIf, g, h), Western English Channel (ICES Divisions VIIe)