FRV Scotia 7/83

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Scotia (749S)
Cruise identifier7/83
Cruise period1983-07-07 — 1983-07-25
Port of departureAberdeen, United Kingdom
Port of returnAberdeen, United Kingdom
Objectives1. To carry out an echointegration and mid-water trawling survey of herring in the Orkney-Shetland area and adjacent areas as part of an ICES-coordinated survey.
2. To undertake in situ measurements of herring target stength using a dual-beam transducer.
3. To collect data on individual weights of herring for establishing a length/weight relationship.
4. To collect herring ovaries for fecundity studies.
5. To collect herring pyloric caeca for parasitological investigations.
6. To collect mackerel stomachs for scientists involved in the ICES Fish Stomach project.
7. To collect water samples for radio-caesium monitoring.
8. Additional objective - to collect herring tissue samples in liquid nitrogen for electrophoretic examination.
Chief scientistRoger S Bailey (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
ProjectICES Herring Survey
Coordinating bodyICES
Cruise reportFRV Scotia 7/83 cruise report sc07_83.pdf (0.13 MB) 
Ocean/sea areas 
GeneralNorth Sea
North East Atlantic Ocean (limit 40W)
SpecificNorthwestern North Sea, Orkney and Shetland
Track chartsFRV Scotia 7/83 cruise track — trk2974.html
Physical oceanography 
Surface measurements underway (T,S)
Water bottle stationsQuantity: number of stations = 51
Description: Surface salinity only
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 71
Description: Also chart recordings of fluorescence at 3 m.
Pelagic fishQuantity: number of hauls = 30
Description: biomass determination
Acoustic reflection on marine organisms.Quantity: track kilometres = 2222.4