FRV Clupea 0489C
Cruise summary report
|Ship name (ship code)||FRV Clupea (74CU)|
|Cruise period||1989-04-03 — 1989-04-12|
|Port of departure||Troon, United Kingdom|
|Port of return||Troon, United Kingdom|
|Objectives||1. 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 scientist||John Gamble (Scottish Office Agriculture and Fisheries Department Aberdeen Marine Laboratory)|
|Cruise report||(0.12 MB)|
|General||Inner Seas off the West Coast of Scotland|
|Water bottle stations||Quantity: number of profiles = 2|
Description: Knudsen bottle samples.
|Biology and fisheries|
|Eggs and larvae||Quantity: number of samples = 274|
Description: Benthic eggs of pelagic spec.
|Other biological/fisheries measurement||Quantity: number of dives = 35|
Description: SEAPUP ROV dives
|Other biological/fisheries measurement||Quantity: activity duration in days = 5|
|Geology and geophysics|
|Grab||Quantity: number of samples = 274|
Description: day grabs
|Bottom photography||Quantity: number of deployments = 6|
Description: frame mounted camera