RV Corella 4/76
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Corella (74CX) |
| Cruise identifier | 4/76 |
| Cruise period | 1976-03-08 — 1976-03-18 |
| Status | Completed |
| Port of departure | Lowestoft, United Kingdom |
| Port of return | Lowestoft, United Kingdom |
| Purpose | Research |
| Objectives | 1. Investigate the distribution and abundance of planktonic fish eggs
and larvae, zooplankton predators and competitors and the phytoplankton using the Lowestoft multipurpose plankton sampler. 2. Monitor the sub-surface water continuously along the ship's track for temperature, salinity, transparency and chlorophyll 'a '. 3. Collect water samples from the pump for salinity and nutrient analyses; calibrate the fluorometer with chlorophyll 'a' extracts: measure phaeophytin, and identify the phytoplankton contribution to chlorophyll 'a ' fluorescence including the preparation of slides for electron microscope examination of the micro-flagellates. 4. Carry out hauls with the Boothbay-net to sample young fish. 5. Use the changing net sampler to investigate vertical distribution of fish eggs and larvae and the zooplankton, alternating with water bottle casts for phytoplankton, chlorophyll 'a' and phaeophytin in relation to temperature and light penetration into the water column over a 26 hour period. 6. Collect samples of fish for stomach content analysis using the young gadoid trawl in midwater. 7. Collect live plankton and fish eggs as required. |
| Chief scientist | Geoffrey P Arnold (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory) |
| Cruise report |  (0.23 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: track kilometres = 2037 |
| Water bottle stations | Quantity: number of stations = 88 Description: surface only |
| Transparency (eg transmissometer) | Quantity: track kilometres = 2037.2 |
| Optics (eg underwater light levels) | Quantity: number of profiles = 1 |
| Surface drifters/drifting buoys | Quantity: number of deployments = 650 Description: bottom |
| Other physical oceanographic measurements | Quantity: number of observations = 97 Description: sea and swell |
| Chemical oceanography | |
| Oxygen | Quantity: track kilometres = 2037.2 |
| Phosphate | Quantity: number of samples = 88 |
| Nitrate | Quantity: number of samples = 88 |
| Nitrite | Quantity: number of samples = 88 |
| Silicate | Quantity: number of species = 88 |
| pH | Quantity: track kilometres = 2037.2 |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 88 |
| Phytoplankton | Quantity: number of samples = 88 |
| Zooplankton | Quantity: number of samples = 93 |
| Eggs and larvae | Quantity: number of samples = 93 Description: spatial and temporal distribution |
| Pelagic fish | Quantity: number of hauls = 4 Description: spatial and temporal distribution |
| Meteorology | |
| Incident radiation | Quantity: activity duration in days = 10 |
