FRV Scotia 1503S

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Scotia (748S)
Cruise identifier1503S
Cruise period2003-10-04 — 2003-10-22
Port of departureAberdeen, United Kingdom
Port of returnAberdeen, United Kingdom
Objectives1. To conduct an acoustic survey to estimate the abundance and distribution of mackerel in the northern North Sea (ICES division IVa).
2. To obtain samples of mackerel for biological analysis, including age, length, weight, sex and maturity.
3. To conduct a towed O.P.C./C.T.D. survey of the Fladen area of the North Sea during transit.
Chief scientistPaul G Fernandes (Fisheries Research Services Aberdeen Marine Laboratory)
Cruise reportFRV Scotia 1503S cruise report 1503s.pdf (0.10 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificNorthern North Sea: Fladen Ground, Viking Bank
Physical oceanography 
CTD stationsQuantity: number of stations = 14
Subsurface temperature and salinity measurementsQuantity: activity duration in days = 18
Description: Thermosalinograph measurements
Biology and fisheries 
Pelagic fishQuantity: number of hauls = 19
Description: 15 trawls contained mackerel
Acoustic reflection on marine organisms.Quantity: number of measurements = 981
Description: Acoustic log intervals of 15 minutes duration
Other biological/fisheries measurementQuantity: number of deployments = 3
Description: Tows of the multisampling towed body(optical plankton counter, CTD, pup nets) at 130 metres at a speed of 5.5 knots.
Other biological/fisheries measurementQuantity: number of specimens = 4732
Description: mackerel measured for length, 886 sampled for weight, sex, maturity and otoliths
Other biological/fisheries measurementQuantity: number of specimens = 3965
Description: fish measured for length, herring 3816, saithe 118, haddock 31