FRV Clupea 9/63
Cruise summary report
|Ship name (ship code)||FRV Clupea (74CU)|
|Cruise period||1963-07-22 — 1963-08-02|
|Port of departure||Buckie, United Kingdom|
|Port of return||Buckie, United Kingdom|
|Objectives||1. 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 scientist||Colin J Chapman (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)|
|Cruise report||(0.08 MB)|
|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 fish||Quantity: 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.