Cruise inventory

FRV Clupea 0489C

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier0489C
Cruise period1989-04-03 — 1989-04-12
Port of departureTroon, United Kingdom
Port of returnTroon, United Kingdom
Objectives1. To use ROV "Sea-pup" to search Ballantrae Bank and other areas in the Clyde for the presence of herring spawn.
2. To use "Day" grab to delimit the extent of the egg patches discovered during Clupea cruise 3/89 and to obtain quantitative samples for stock estimation work.
3. To set up a time-lapse camera or a camera frame with pan and tilt on Ballantrae Bank if herring shoals are observed on the echosounder - in an attempt to obtain film of spawning herring.
4. To undertake limited hydrography work at Ballantrae to establish temperature and salinity profiles during the period of the cruise.
5. To support diving work on the egg patch to examine:
a) mortality of eggs during development
b) localised egg distribution patterns
c) factors affecting the spawning behaviour of herring
d) egg mass porosity and oxygen demand and
e) identification of predators.
Chief scientistJohn Gamble (Scottish Office Agriculture and Fisheries Department Aberdeen Marine Laboratory)
Cruise reportFRV Clupea 0489C cruise report cl4_89.pdf — access key 'C' (0.12 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
Track chartsFRV Clupea 0489C cruise track — trk3540a.html FRV Clupea 0489C cruise track — trk3540b.html
Physical oceanography 
Water bottle stationsQuantity: number of profiles = 2
Description: Knudsen bottle samples.
Biology and fisheries 
Eggs and larvaeQuantity: number of samples = 274
Description: Benthic eggs of pelagic spec.
Other biological/fisheries measurementQuantity: number of dives = 35
Description: SEAPUP ROV dives
Other biological/fisheries measurementQuantity: activity duration in days = 5
Description: Diving
Geology and geophysics 
GrabQuantity: number of samples = 274
Description: day grabs
Bottom photographyQuantity: number of deployments = 6
Description: frame mounted camera