RV Cefas Endeavour 11/05
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Cefas Endeavour (74E9) |
| Cruise identifier | 11/05 |
| Cruise period | 2005-07-12 — 2005-07-16 |
| Status | Completed |
| Port of departure | Lowestoft, United Kingdom |
| Port of return | Lowestoft, United Kingdom |
| Purpose | Research |
| Objectives | This 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 scientist | Tracy Ann Maxwell (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory) |
| Cruise programme |  (0.02 MB) |
| Cruise report | (0.03 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | Silver Pit |
| Measurements | |
| Biology and fisheries | |
| Phytoplankton | Quantity: number of stations = 8 Description: TTN stations |
| Zooplankton | Quantity: number of stations = 8 Description: TTN stations |
| Zoobenthos | Quantity: number of hauls = 13 Description: 2m beam epifauna catches sized fractionated for stable isotope and energetic analysis. |
| Demersal fish | Quantity: 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 | |
| Grab | Quantity: number of samples = 35 Description: NIOZ cores seived to obtain benthic infauna for stable isotope and energetic analysis. |
