Cruise inventory

FRV Clupea 6/76

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier6/76
Cruise period1976-05-10 — 1976-06-03
StatusCompleted
Port of departureAberdeen, United Kingdom
Port of returnAberdeen, United Kingdom
PurposeTrials
Objectives1. To conduct comparative fishing trials between the North Sea Trawl and Aberdeen 40' boltrope trawl.
2. Provided that conclusive comparative fishing results had first been obtained, to examine the effect of mesh size in the square on selectivity by substituting a 3 1/2" mesh square in the Aberdeen trawl.

7 valid hauls made with the North Sea trawl. 5 hauls made with the Aberdeen trawl.
Chief scientistM D Nicholson (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Clupea 6/76 cruise report cl6_76.pdf — access key 'C' (0.17 MB) 
Ocean/sea areas 
GeneralNorth Sea
North East Atlantic Ocean (limit 40W)
SpecificShetland area, Turbot Bank, Balta Grounds
Measurements 
Biology and fisheries 
Pelagic fishQuantity: activity duration in days = 3
Description: 8 hauls made at Turbot Bank, 4 hauls by each gear. A total of 1066 haddock, 105 whiting, 144 cod, and 706 flatfish were caught using the North Sea Trawl . The average catch being 266 for haddock, 36 for cod, 26 for whiting and 176 for flatfish. A total of 819 haddock, 59 whiting, 66 cod, and 702 flatfish were caught using the Aberdeen Trawl . The average catch being 205 for haddock, 16 for cod, 15 for whiting and 176 for flatfish.
Pelagic fishQuantity: activity duration in days = 2
Description: 18 hauls made in the Shetland area, 10 with the North Sea trawl and 8 with the Aberdeen trawl. A total of 11330 haddock, 1280 whiting, 365 cod, and 1042 flatfish were caught using the North Sea Trawl . The average catch being 1133 for haddock, for 36 cod, 128 for whiting and 104 for flatfish. A total of 3261 haddock, 565 whiting, 260 cod, and 515 flatfish were caught using the Aberdeen Trawl . The average catch being 408 for haddock, 32 for cod, 71 for whiting and 64 for flatfish.
Demersal fishQuantity: activity duration in days = 3
Description: 8 hauls made at Turbot Bank, 4 hauls by each gear. A total of 1066 haddock, 105 whiting, 144 cod, and 706 flatfish were caught using the North Sea Trawl . The average catch being 266 for haddock, 36 for cod, 26 for whiting and 176 for flatfish. A total of 819 haddock, 59 whiting, 66 cod, and 702 flatfish were caught using the Aberdeen Trawl . The average catch being 205 for haddock, 16 for cod, 15 for whiting and 176 for flatfish.
Demersal fishQuantity: activity duration in days = 2
Description: 18 hauls made in the Shetland area, 10 with the North Sea trawl and 8 with the Aberdeen trawl. A total of 11330 haddock, 1280 whiting, 365 cod, and 1042 flatfish were caught using the North Sea Trawl . The average catch being 1133 for haddock, for 36 cod, 128 for whiting and 104 for flatfish. A total of 3261 haddock, 565 whiting, 260 cod, and 515 flatfish were caught using the Aberdeen Trawl . The average catch being 408 for haddock, 32 for cod, 71 for whiting and 64 for flatfish.