Cruise inventory

FRV Clupea 9/63

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier9/63
Cruise period1963-07-22 — 1963-08-02
Port of departureBuckie, United Kingdom
Port of returnBuckie, United Kingdom
Objectives1. Comparative fishing with a Vinge trawl, with and without large mesh extensions to the wings, by day and by night.
2. Photography of fish behaviour in the vicinity of the trawl.
3. Selectivity of polypropylene codend.
4. To rendezvous with the Laboratory divers at Burghead who will examine a float of cotton and synthetic drift nets for 'hanging' and relative visibility (held over from previous cruise).

Drift nets (synthetic/cotton/green Ulstron/white Ulstron/brown nylon) were shot and examined 2miles NW of Burghead.
Chief scientistColin J Chapman (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Clupea 9/63 cruise report cl9_63.pdf — access key 'C' (0.08 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificSmith Bank
Physical oceanography 
Optics (eg underwater light levels)Quantity: number of profiles = 48
Description: Light readings were taken every 10 metres to the bottom before and after each haul
Biology and fisheries 
Pelagic fishQuantity: number of hauls = 24
Description: 4 hauls, 2 a night and 2 a day carried over the same piece of ground during each 24 hour period. For each pair of day and night hauls, the Vinge trawl was fished alternately with and without 18-inch coarse mesh extensions to the wings.