Cruise inventory

FRV Mara 9/69

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Mara (74MR)
Cruise identifier9/69
Cruise period1969-08-04 — 1969-09-12
Port of departureBuckie, United Kingdom
Objectives1) Observation and photography of the behaviour of round and flatfish during the process of seine netting
2) Observation and recording of the changes of shapes of the gear and sinking rates of the seine ropes
3) Underwater photometry for studies of underwater visibility in relation to fish behaviour
4) Underwater tagging during the second part of the trip
5) Surface studies were made of warp divergence and depression angles, and the speed of the gear through the water

Onshore winds or fog prevented work on 7 working days of the cruise
Chief scientistC C Hemmings (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Mara 9/69 cruise report mara9_69.pdf — access key 'C' (0.11 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificSpey Bay, 'Bellings' Ground, NE of Buckie
Biology and fisheries 
Demersal fishQuantity: number of specimens = 66
Description: Plaice. Released in the path of the net for study of recapture rates
TaggingsQuantity: number of specimens = 271
Description: Haddock from 9 hauls were tagged and released at a depth of approximately 12 fathoms
Gear researchQuantity: number of hauls = 57
Description: Seine shots. 44 commentries