FRV Explorer 11/81

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Explorer (74EX)
Cruise identifier11/81
Cruise period1981-12-09 — 1981-12-23
Port of departureLeith, United Kingdom
Port of returnAberdeen, United Kingdom
Objectives1. To survey the stocks of spurdogs (Squalus acanthias) to the north and west of Scotland.
2. To tag spurdogs.
3. To collect data on the feeding and fecundity of spurdogs.
4. Various whitefish samples were collected for the Parasitology Section

''Explorer'' sheltered in Dunnet Bay on the 20/12/1981 till the 22/12/1981
Chief scientistJ A Gauld (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Explorer 11/81 cruise report explorer11_81.pdf (0.16 MB) 
Ocean/sea areas 
GeneralNorth Sea
North East Atlantic Ocean (limit 40W)
SpecificN. & W. Scotland, Orkney area, Dunnet Bay, North and South Minch, Gruinard Bay, Hoy area
Track chartsFRV Explorer 11/81 cruise track — trk2716.html
Biology and fisheries 
Demersal fishQuantity: number of hauls = 26
Description: valid trawl hauls were made over the survey area for spurdogs. 1059 stomachs were examined
TaggingsQuantity: number of specimens = 1475
Description: Spurdogs measured, sexed, double tagged and released. 76 Scylirhirus were tagged and released
Exploratory fishingQuantity: number of hauls = 30
Description: commercial.