RRS Challenger C/1/82 (CH1/82)
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Challenger (74CH) |
| Cruise identifier | C/1/82 (CH1/82) |
| Cruise period | 1982-01-11 — 1982-01-18 |
| Status | Completed |
| Port of departure | Barry, United Kingdom |
| Port of return | Barry, United Kingdom |
| Purpose | Research |
| Objectives | 1. To compare the vertical distribution and species composition of the overwintering plankton in the shallow shelf sea (100m) with the plankton from the deep ocean (>2000m), with special reference to C. helgolandicus.
2. To collect live material from a range of depths to determine whether or not the Calanus from the shelf sea are in a different physiological state from those in the deep ocean. 3. To determine the levels of extra-cellular digestive enzymes in Calanus from both sites and determine the effects of starvation on the enzyme activity. 4. To investigate the biotic conditions (chlorophyll, POC, phytoplankton etc.) and the hydrography at each of the station sites. |
| Chief scientist | Bob Williams (Institute of Marine Environmental Research, Plymouth) |
| Cruise report |  (0.10 MB) |
| Ocean/sea areas | |
| General | Bristol Channel Celtic Sea |
| Specific | Celtic Sea |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: activity duration in days = 7 Description: continuous recording |
| Bathythermograph | Quantity: number of profiles = 5 |
| CTD stations | Quantity: number of profiles = 4 Description: CTD with fluorometer |
| Contamination | |
| Suspended matter | Quantity: number of profiles = 4 |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 36 Description: Collected on 4 profiles for extracted chlorophyll. |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of profiles = 4 Description: CTD with fluorometer |
| Particulate organic matter (inc POC, PON) | Quantity: number of profiles = 4 |
| Phytoplankton | Quantity: number of profiles = 4 |
| Zooplankton | Quantity: number of samples = 461 Description: LHPR and RMT hauls. Samples preserved by drying, freezing or formalin for subsequent chemical analysis, |
| Seston | Quantity: number of profiles = 4 |
| Other biological/fisheries measurement | Quantity: number of samples = 40 Description: extra-cellular enzyme activity |
| Data held at BODC | |
| Discrete samples | |
| 17 General station with STD/bottles/additional instruments | Salinity of the water column Phaeopigment concentrations in the water column Chlorophyll pigment concentrations in water bodies |
