FRV Explorer 2/80
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | FRV Explorer (74EX) |
| Cruise identifier | 2/80 |
| Cruise period | 1980-01-30 — 1980-02-10 |
| Status | Completed |
| Port of departure | Aberdeen, United Kingdom |
| Port of return | Aberdeen, United Kingdom |
| Purpose | Research |
| Objectives | 1) To take part in the International Young Herring and Gadoid Pre-recruit Survey in the North Sea.
2) To determine the age composition of cod, haddock, saithe, and whiting for each block of squares. 3) To undertake, on completion of the International Survey, two trauls per statistical square in the blocks numbered 1-3 12 stations were completed. A total of 57 valid hauls were made during both parts of the cruise using the GOV trawl and 2912 otoliths taken from cod, haddock, and whiting were read at sea. Material was collected for use in multispecies models. Maturities of haddock and whiting to determine the age at first spawning were recorded at stations north of 59 degrees, 30 minutes. Invertrbrates were taken in very small numbers throughout most of the cruise. |
| Chief scientist | Arthur S Jermyn (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory) |
| Project | IYFS |
| Coordinating body | ICES |
| Cruise report |  (4.11 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | N. Scotland/ Shetlands, Danish coast, English coast (wash area) |
| Track charts | (2.64 MB) |
| Measurements | |
| Physical oceanography | |
| Water bottle stations | Quantity: number of stations = 23 Description: top & bottom temperature and salinities |
| Chemical oceanography | |
| Phosphate | Quantity: 4 |
| Nitrate | Quantity: 4 |
| Ammonia | Quantity: 4 |
| Silicate | Quantity: 4 |
| Contamination | |
| Trace metals | Quantity: 12 |
| Biology and fisheries | |
| Eggs and larvae | Quantity: 19 |
| Pelagic fish | Quantity: number of hauls = 25 Description: biomass determination,population structures |
| Demersal fish | Quantity: number of hauls = 25 Description: Samples of haddock, hake, ling, and whiting for the measurement of total nitrogen content were deep frozen for Dr Mackie of the Torry Research Station. |
| Crustaceans | Quantity: 25 |
