FRV Explorer 5/75
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | FRV Explorer (74EX) |
| Cruise identifier | 5/75 |
| Cruise period | 1975-06-23 — 1975-07-08 |
| Status | Completed |
| Port of departure | Aberdeen, United Kingdom |
| Port of return | Aberdeen, United Kingdom |
| Purpose | Research |
| Objectives | 1) To participate in the international North Sea 0-group gadoid survey
2) To take part in an international comparative fishing exercise 3) To collect data on the food of 0-group gadoids 4) To make routine observations of the environment 5) The JONIS line was completed successfully 6) 9 Gulf III hauls were made for Dr Bailey, to supplement the sprat egg and larval survey that was being carried out by the ''Mara'' 7) Samples of young gadoids were collect for Dr Wardle and Dr Mackie (T.R.S) 8) A small number of sprat ovaries were preserved for fecundity estimations and for histological studies. 9) A number of live fish were brought back for the aquarium Sailing was delayed by engine trouble until the 23/06/1975. The ship went to an anchorage in Inganess Bay to carry out repairs on the engine, it departed on the 24/06/1975. Further work on the engine forced ''Explorer'' to anchor on the 30/06/1975. The ship put into Lerwick on the 01/07/1975 where water was taken and for a change in crew, it left on the 02/07/1975. |
| Chief scientist | John R G Hislop (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory) |
| Project | ICES International O-Group Gadoid Survey |
| Coordinating body | ICES |
| Cruise report |  (0.17 MB) |
| Ocean/sea areas | |
| General | North Sea Irish Sea and St. George's Channel |
| Specific | E and W of the Shetlands, Orkneys, Moray Firth, off the Scottish East coast |
| Measurements | |
| Physical oceanography | |
| Water bottle stations | Quantity: number of stations = 10 |
| Chemical oceanography | |
| Phosphate | Quantity: 10 |
| Nitrate | Quantity: 10 |
| Silicate | Quantity: 10 |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: 10 |
| Zooplankton | Quantity: 9 |
| Mammals and reptiles | |
| Demersal fish | Quantity: number of hauls = 51 Description: spatial and temporal distribution of cod, haddock, saithe and whiting |
| Taggings | Quantity: 49 Description: Whiting caught with handlines, 26 off Scalloway, 23 in the Moray Firth |
