RV Clione CLI6/68
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Clione (74CN) |
| Cruise identifier | CLI6/68 |
| Cruise period | 1968-04-30 — 1968-05-10 |
| Status | Completed |
| Port of departure | Lowestoft, United Kingdom |
| Port of return | Lowestoft, United Kingdom |
| Purpose | Research |
| Objectives | 1. To carry out routine sampling of turbot from the north-central North Sea.
2. To bring back suitable live turbot for the laboratory rearing of eggs and larvae. 3. To carry out artificial fertilization at sea, returning fertilized eggs live to the laboratory. 4. To carry out a tin tow net survey of the area for turbot eggs and larvae. 5. To collect and bring back a quantity of zooplankton suitable for the laboratory feeding of larvae. 6. To collect live spawning fish for Dr Purdom (all species). 7. To collect and freeze flatfish hearts and muscle for Mr Iles. 8. To collect and freeze bulk skinless cod fillets and cod guts for Mr Birkett. 9. To collect live turbot tapeworms and their eggs for Mr Davey, Commonwealth Bureau of Helminthology. 10. To measure sea-bottom and sea-surface temperatures along the gas pipeline cast of the Haisborough light-vessel . A short tin tow net survey was carried out in and around Cleaver Bank in the area where the heaviest catches of turbot were obtained. A quantity of small zooplankton was collected using the 200 m.p.i International net and placed in carboys of seawater and returned live to the laboratory for the feeding of larvae |
| Chief scientist | Robert R Dickson (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory) |
| Cruise report |  (0.20 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | Cleaver Bank, Tail End, Middle Rough, Inner Shoal, off Mablethorpe, Hospital Ground,and the southern end of the Pits |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: number of stations = 3 Description: Surface and Bottom sea temperatures were made along the gas pipeline east of the Haisborough light-vessel |
| Subsurface temperature and salinity measurements | Quantity: number of stations = 3 Description: Surface and Bottom sea temperatures were made along the gas pipeline east of the Haisborough light-vessel |
| Biology and fisheries | |
| Eggs and larvae | Quantity: number of hauls = 2 Description: Made with the 2 metre Stramin net. 1 successful 3/4-hour haul obtained brill and sole eggs |
| Demersal fish | Quantity: number of samples = 75 Description: Hearts and muscle-blocks were taken from flatfish: 12 plaice, 12 brill, 12 dover sole, 12 lemon sole, 12 dabs, 6 flounders and 9 turbot |
| Demersal fish | Quantity: number of specimens = 20 Description: Mature turbot brought back to the laboratory |
| Demersal fish | Quantity: number of hauls = 46 Description: All hauls were 1 1/2 hours duration, bar one haul of 1 1/4 hours at Cleaver bank and another of 2 hours at Cleaver Bank |
| Demersal fish | Quantity: number of specimens = 226 Description: 55 Turbot and 171 brill were caught |
| Demersal fish | Quantity: number of specimens = 75 Description: 10 spawning lemon soles and 65 spawning dover soles were brought back to the laboroatory |
| Meteorology | |
| Occasional standard measurements | Quantity: number of samples = 3 Description: Bothriocephalus scorpii kept in Tyrode's solution |
