1. 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
J A Gauld (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
North Sea North East Atlantic Ocean (limit 40W)
N. & W. Scotland, Orkney area, Dunnet Bay, North and South Minch, Gruinard Bay, Hoy area
Biology and fisheries
Quantity: number of hauls = 26 Description: valid trawl hauls were made over the survey area for spurdogs. 1059 stomachs were examined
Quantity: number of specimens = 1475 Description: Spurdogs measured, sexed, double tagged and released. 76 Scylirhirus were tagged and released
Quantity: number of hauls = 30 Description: commercial.