Cruise inventory

FRV Explorer 5/77

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Explorer (74EX)
Cruise identifier5/77
Cruise period1977-06-20 — 1977-07-04
StatusCompleted
Port of returnAberdeen, United Kingdom
PurposeResearch
Objectives1) To take part in an international trawling survey of pelagic 0-group gadoids in the North Sea
2) Samples of 0-group gadoids were deep forzen for use by the Torry Research Station and the Lowestoft Laboratory
3) Otoliths of sprats and sandeels were collected on an area basis

Saling was delayed till the 20/06/1977 due to shortages of engine room crew. ''Explorer'' was forced to anchor off Clyth Ness whilst leaking condenser tubes were replaced. A short call at Lerwick was made on the 27/06/1977 for a crew member to see a doctor. Further leakages in the condenser tubes forced the ship to anchor in Inganess Bay on the 30/06/1977 for 24 hours.
Chief scientistJohn R G Hislop (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Explorer 5/77 cruise report explorer5_77.pdf — access key 'C' (1.12 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
North East Atlantic Ocean (limit 40W)
SpecificBuchan Ness, Clyth Ness, Shetland and Orkney Islands, outer Moray Firth
Track chartsFRV Explorer 5/77 cruise track — trk1971.html
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 10
Chemical oceanography 
PhosphateQuantity: 10
NitrateQuantity: 10
SilicateQuantity: 10
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: 10
ZooplanktonQuantity: 25
Pelagic fishQuantity: number of hauls = 36
Description: survey:identification,distribution of post larvae stage. Haddock, cod, saithe, whiting and Norway pout were caught. By catches of sprats and sandeels. 86 pairs of sprat ovaries were preserved in formalin for fecundity studies
Demersal fishQuantity: number of hauls = 36
Description: survey:identification,distribution of post larvae stage. Haddock, cod, saithe, whiting and Norway pout were caught. By catches of sprats and sandeels. 86 pairs of sprat ovaries were preserved in formalin for fecundity studies
Other biological/fisheries measurementQuantity: number of hauls = 36
Description: survey:identification,distribution of post larvae stage. Haddock, cod, saithe, whiting and Norway pout were caught. By catches of sprats and sandeels. 86 pairs of sprat ovaries were preserved in formalin for fecundity studies