Cruise inventory

FRV Explorer Additional Cruise 1981

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Explorer (74EX)
Cruise identifierAdditional Cruise 1981
Cruise period1981-04-08 — 1981-04-23
StatusCompleted
Port of departureAberdeen, United Kingdom
Port of returnAberdeen, United Kingdom
PurposeResearch
Objectives1) A routine demersal fish survey in the Northern North Sea.
2) A contribution was made to the ICES stomach sampling programme
3) Liver samples from cod, haddock and whiting were obtained and stored in liquid nitrogen
4) Trials were made with the system recently developed to weigh individual fish at sea

Engine trouble caused the ship to dock at Kirkwell on the 15/04/1981 sailing again after a change in personnel on the 17/04/1981.
Chief scientistAndrew W Newton (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Explorer Additional Cruise 1981 cruise report explorer_april81.pdf — access key 'C' (1.70 MB) 
Ocean/sea areas 
GeneralNorth Sea
Norwegian Sea
North East Atlantic Ocean (limit 40W)
SpecificNorth Sea, E of Orkney, off the Shetlands, Moray Firth, Aberdeen Bank, Fladen Ground, Bressay Ground, Buchan Deeps, Burgen and Ling Banks
Track chartsFRV Explorer Additional Cruise 1981 cruise track — explorer_apr81track.pdf (00 MB) 
Measurements 
Biology and fisheries 
Pelagic fishQuantity: number of hauls = 44
Description: 1 hour duration. GOV trawl hauls fitted with rubber bobbins, monitoring, pathology. Haddock, whiting, herring, flatfish, long rough dabs, and cod caught. 805 herring were otolithed during the cruise. 6312 stomachs of cod, whiting, haddock and saithe were examined, over 4000 stomachs were preserved for further analysis in the Laboratory. The total weights and gutted weights of 728 haddock were determined.
Demersal fishQuantity: number of hauls = 44
Description: 1 hour duration. GOV trawl hauls fitted with rubber bobbins, monitoring, pathology. Haddock, whiting, herring, flatfish, long rough dabs, and cod caught. 805 herring were otolithed during the cruise. 6312 stomachs of cod, whiting, haddock and saithe were examined, over 4000 stomachs were preserved for further analysis in the Laboratory. The total weights and gutted weights of 728 haddock were determined.