RRS Frederick Russell FR9/82 (C/2/82)
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Frederick Russell (74GG) |
| Cruise identifier | FR9/82 (C/2/82) |
| Cruise period | 1982-06-28 — 1982-07-08 |
| Status | Completed |
| Port of departure | Plymouth, United Kingdom |
| Port of return | Plymouth, United Kingdom |
| Purpose | Research |
| Objectives | To measure the impact that the common herbivorous copepod Calanus helgolandicus makes on the level of primary production on shelf seas and to ascertain the flow of carbon through this secondary trophic level.
1) To measure in situ primary production and light in the water column at Station CS2. 2) To measure the abundance and vertical distribution of phytoplankton, bacteria and flagellates. 3) To measure the release of dissolved organic matter by phytoplankton and the concomitant uptake by bacteria. 4) To partition primary production into different size classes of phytoplankton. 5) To determine the vertical distribution, abundance and diel migration of all development stages of Calanus helgolandicus (eggs - adult). 6) To obtain living material for length/dry weight, gut contents, carbon, nitrogen, ash content, calorific value and lipid reserve. 7) To measure the feeding rate (ingestion) of Calanus on natural particulates from three selected depth strata under simulated ambient conditions. 8) To measure the assimilation rate and absorption efficiency by Calanus using radioactive tracer and gut enzyme analysis techniques. 9) To ascertain the horizontal and vertical structure of the biological and physical environment around CS2. 10) To measure primary production at selected Stations along the Plymouth to Roscoff UOR (PR) route. 11) To contribute towards a seasonal study of phytoplankton and zooplankton at Station A1. |
| Chief scientist | Bob Williams (Institute of Marine Environmental Research, Plymouth) |
| Cruise report |  (0.22 MB) |
| Ocean/sea areas | |
| General | English Channel Celtic Sea |
| Specific | Station CS2 (50.5N, 7W) |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | |
| Bathythermograph | Quantity: number of profiles = 19 Description: XBT |
| Water bottle stations | Quantity: number of profiles = 34 Description: T surface 7 S surface |
| CTD stations | Quantity: number of profiles = 25 |
| Subsurface temperature and salinity measurements | Quantity: track kilometres = 370.4 Description: 6 tows with UOR (chlorophyll, temperature, depth) |
| Chemical oceanography | |
| Phosphate | Quantity: number of profiles = 13 |
| Total - P | Quantity: number of profiles = 13 |
| Nitrate | Quantity: number of profiles = 13 |
| Nitrite | Quantity: number of profiles = 13 |
| Silicate | Quantity: number of profiles = 13 |
| Biology and fisheries | |
| Primary productivity | Quantity: number of profiles = 12 |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: track kilometres = 370.4 Description: 6 tows with UOR (chlorophyll, temperature, depth) |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of profiles = 38 |
| Particulate organic matter (inc POC, PON) | Quantity: number of profiles = 8 |
| Dissolved organic matter (inc DOC) | Quantity: number of profiles = 9 |
| Phytoplankton | Quantity: number of profiles = 6 |
| Zooplankton | Quantity: number of hauls = 9 Description: LHPR tows studying distribution, biomass,energy transfers, population structures. |
| Pelagic bacteria/micro-organisms | Quantity: number of profiles = 8 |
| Data held at BODC | |
| Discrete samples | |
| 171 General station with STD/bottles/additional instruments | Salinity of the water column Temperature of the water column Phaeopigment concentrations in the water column Chlorophyll pigment concentrations in water bodies |
