Cruise inventory

FRV Clupea 4/70

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier4/70
Cruise period1970-03-30 — 1970-04-03
StatusCompleted
Port of departureBuckie, United Kingdom
Port of returnBuckie, United Kingdom
PurposeTrials
ObjectivesTo experiment with towing speeds and with various canvas fittings in the extension piece of the trawl with a view to improving the condition of trawl caught fish by reducing the fatigue factor.

Because of the short time available, no attempt was made to vary the towing speed. All hauls were made at 1 1/2 knots, in 35 fm, but with varying arrangements of canvas in the extension piece. A detachable codend was used but was raised to the surface at normal hauling rates on each occasion.
Chief scientistRodney Jones (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Clupea 4/70 cruise report cl4_70.pdf — access key 'C' (0.06 MB) 
Ocean/sea areas 
GeneralNorth Sea
Measurements 
Biology and fisheries 
Demersal fishQuantity: number of specimens = 50
Description: Haddock selected from hauls taken back alive to the aquarium
TaggingsQuantity: number of specimens = 127
Description: 116 Haddock, 4 whiting, 4 cod, and 3 plaice were tagged