Cruise inventory

FRV Explorer 5/75

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Explorer (74EX)
Cruise identifier5/75
Cruise period1975-06-23 — 1975-07-08
StatusCompleted
Port of departureAberdeen, United Kingdom
Port of returnAberdeen, United Kingdom
PurposeResearch
Objectives1) To participate in the international North Sea 0-group gadoid survey
2) To take part in an international comparative fishing exercise
3) To collect data on the food of 0-group gadoids
4) To make routine observations of the environment
5) The JONIS line was completed successfully
6) 9 Gulf III hauls were made for Dr Bailey, to supplement the sprat egg and larval survey that was being carried out by the ''Mara''
7) Samples of young gadoids were collect for Dr Wardle and Dr Mackie (T.R.S)
8) A small number of sprat ovaries were preserved for fecundity estimations and for histological studies.
9) A number of live fish were brought back for the aquarium

Sailing was delayed by engine trouble until the 23/06/1975. The ship went to an anchorage in Inganess Bay to carry out repairs on the engine, it departed on the 24/06/1975. Further work on the engine forced ''Explorer'' to anchor on the 30/06/1975. The ship put into Lerwick on the 01/07/1975 where water was taken and for a change in crew, it left on the 02/07/1975.
Chief scientistJohn R G Hislop (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
ProjectICES International O-Group Gadoid Survey
Coordinating bodyICES
Cruise reportFRV Explorer 5/75 cruise report explorer5_75.pdf — access key 'C' (0.17 MB) 
Ocean/sea areas 
GeneralNorth Sea
Irish Sea and St. George's Channel
SpecificE and W of the Shetlands, Orkneys, Moray Firth, off the Scottish East coast
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: 9
Mammals and reptiles
Demersal fishQuantity: number of hauls = 51
Description: spatial and temporal distribution of cod, haddock, saithe and whiting
TaggingsQuantity: 49
Description: Whiting caught with handlines, 26 off Scalloway, 23 in the Moray Firth