RV Cefas Endeavour 18/05
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Cefas Endeavour (74E9) |
| Cruise identifier | 18/05 |
| Cruise period | 2005-11-05 — 2005-11-10 |
| Status | Completed |
| Port of departure | Lowestoft, United Kingdom |
| Port of return | Lowestoft, United Kingdom |
| Purpose | Research |
| Objectives | This was the fifth of seven related cruises to the Silver Pit, central North Sea in 2005/06 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:
1) 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). 2) 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. 3) To collect samples to allow analysis of relationships between body size and production for zooplankton, benthic invertebrate and fish communities. |
| Chief scientist | Michaela Schratzberger (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory) |
| Cruise programme |  (0.01 MB) |
| Cruise report | (0.08 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Measurements | |
| Chemical oceanography | |
| Isotopes | Quantity: number of stations = 8 Description: 4m beam trawl stations. The fish caught on these trawls were processed for stable isotope and energetic analysis. |
| Isotopes | Quantity: number of cores = 7 Description: NIOZ cores were collected and sub-sampled for the analysis of sediment granulometry and stable isotopes, meiofauna, chlorophyll a and porosity. |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of cores = 7 Description: NIOZ cores were collected and sub-sampled for the analysis of sediment granulometry and stable isotopes, meiofauna, chlorophyll a and porosity. |
| Zooplankton | Quantity: number of stations = 8 Description: TTN stations. |
| Zoobenthos | Quantity: number of stations = 4 Description: 2m beam trawl. |
| Demersal fish | Quantity: number of stations = 8 Description: 4m beam trawl stations. The fish caught on these trawls were processed for stable isotope and energetic analysis. |
| Geology and geophysics | |
| Core - soft bottom | Quantity: number of cores = 7 Description: NIOZ cores were collected and sub-sampled for the analysis of sediment granulometry and stable isotopes, meiofauna, chlorophyll a and porosity. |
