FRV Scotia 13/82

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Scotia (749S)
Cruise identifier13/82
Cruise period1982-12-02 — 1982-12-19
Port of returnAberdeen, United Kingdom
Objectives1. To carry out a survey of Norway pout and associated by-catch species in the northwestern North Sea.
2. To investigate differences in by-catch rates in different strata of horizontally divided trawls.
3. To investigate the reaction of Norway pout to trawls by appropriate photographic techniques.
4. To investigate the depth distribution of Norway pout using an echosounder and a midwater trawl to sample echotraces.
5. To investigate the food and feeding rhythm of Norway pout in relation to available plankton.
6. To investigate the light parameters (turbidity, light levels and bioluminescence) on the Norway pout fishing grounds.
7. To carry out trials o a fibre-glass Gulf III plankton sampler.
8. To sample seawater for radio-caesium analysis.
9. To carry out an echosounder search for mackerel concentrations in the area north and northwest of Scotland (additional objective).
Chief scientistRoger S Bailey (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Scotia 13/82 cruise report sc13_82.pdf (0.12 MB) 
Ocean/sea areas 
GeneralNorth Sea
North East Atlantic Ocean (limit 40W)
SpecificNorthwestern North Sea and north of Scotland
Track chartsFRV Scotia 13/82 cruise track — trk2886.html
Physical oceanography 
Optics (eg underwater light levels)Description: light readings taken using a light meter after some of the trawl hauls.
Chemical oceanography 
RadioactivityDescription: water sample for radio-caesium analysis.
Trace metals
Biology and fisheries 
Demersal fishQuantity: number of stations = 18
Description: sampled using the three-level trawl BT 151a.
Acoustic reflection on marine organisms.Description: echosounder recordings.
Gear researchQuantity: number of hauls = 18
Exploratory fishingQuantity: number of hauls = 18