Cruise inventory

FRV Clupea 1079C

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier1079C
Cruise period1979-07-30 — 1979-08-24
StatusCompleted
Port of departureAberdeen, United Kingdom
Port of returnBuckie, United Kingdom
PurposeTrials
Objectives1. To obtain instrumented measurements of scallop dredge fore and aft inclinations for a range of warp length/depth ratios and towing speeds.
2. To compare the catching performance of two modified dredges and a standard dredge.
3. To obtain underwater TV recordings of the dredges in operation.
Chief scientistEdward S Strange (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Clupea 1079C cruise report cl10_79.pdf — access key 'C' (0.18 MB) 
Ocean/sea areas 
GeneralNorth Sea
Inner Seas off the West Coast of Scotland
Measurements 
Biology and fisheries 
MolluscsQuantity: number of specimens = 806
Description: Scallops caught during dredge hauls with the modified and standard dredges fished together as a 3-dredge array. 381 scallops and 62 baskets of stones/rubbish caught with the standard dredge, 248 scallops and 38 baskets of stones/rubbish caught with the modified dredge (b) and 177 scallops and 11 baskets of stones/rubbish caught with the modified dredge
Gear researchQuantity: number of hauls = 8
Description: Instrumented dredge hauls using three and four standard dredge arrays. Measurements of dredge fore and aft inclinations for a range of towing speeds, depths and warp lengths were obtained.
Gear researchQuantity: number of hauls = 45
Description: Dredge hauls with the modified and standard dredges fished together as a 3-dredge array.
Geology and geophysics 
Bottom photographyQuantity: number of hauls = 8
Description: Observation dredge hauls using underwater TV. 7 tapes of underwater gear observations were obtained