Cruise inventory

RV Cefas Endeavour 11/05

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Cefas Endeavour (74E9)
Cruise identifier11/05
Cruise period2005-07-12 — 2005-07-16
StatusCompleted
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
PurposeResearch
ObjectivesThis was the third of five related cruises to the Silver Pit, central North Sea, in 2005 to describe the effects of fishing and the environment on production and food web structure during a seasonal production cycle. The data collected will be used to parameterise size-based food web models and to describe how seasonal patterns of energy flow affect indicators of fisheries impacts on trophic structure, biomass and production. The specific objectives of the cruise were:
a) to collect samples to allow analysis of spatial and temporal variation in carbon and nitrogen stable isotope ratios close to the base of marine food chains (filter feeding infauna and zooplankton);
b) to collect samples to allow analysis of relationships between body size, energy content and trophic level (from nitrogen stable isotope analysis) in space and time for zooplankton, benthic invertebrate and fish communities;
c) to collect samples to allow analysis of relationships between body size and production for zooplankton, benthic invertebrate and fish communities.
All the aims were successfully completed.
Chief scientistTracy Ann Maxwell (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)
Cruise reportRV Cefas Endeavour 11/05 cruise report endeavour11_05.pdf — access key 'C' (0.03 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificSilver Pit
Measurements 
Biology and fisheries 
PhytoplanktonQuantity: number of stations = 8
Description: TTN stations
ZooplanktonQuantity: number of stations = 8
Description: TTN stations
ZoobenthosQuantity: number of hauls = 13
Description: 2m beam epifauna catches sized fractionated for stable isotope and energetic analysis.
Demersal fishQuantity: number of hauls = 9
Description: 4m beam trawls carried out to collect fish liver and tissue samples for stable isotope and energetic analysis.
Geology and geophysics 
GrabQuantity: number of samples = 35
Description: NIOZ cores seived to obtain benthic infauna for stable isotope and energetic analysis.