FRV Clupea 0486C
Cruise summary report
|Ship name (ship code)||FRV Clupea (74CU)|
|Cruise period||1986-03-12 — 1986-03-27|
|Port of departure||Stornoway, United Kingdom|
|Port of return||Greenock, United Kingdom|
|Objectives||1. To carry out echosounding and trawling surveys of the South Arran and Ballantrae Bank areas of the Clyde in an attempt to delimit spawning aggregations of herring.
2. To carry out a series of grab surveys on Ballantrae Bank to check for the presence of herring spawn.
3. To use reversing bottles and the CTD system to establish a temperature/salinity profile over Ballantrae Bank over the period of the survey.
4. To carry out a series of larval surveys on Ballantrae Bank to check for herring larvae and to use these to provide estimates of larval production.
5. To carry out biological sampling of trawl catches to establish the age and length compositions of the spring spawning stock of herring and to collect herring otoliths for stock separation studies.
|Chief scientist||John A Morrison (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)|
|Cruise report||(0.11 MB)|
|General||Inner Seas off the West Coast of Scotland|
|Specific||Ballantrae Bank/ South Arran|
|Water bottle stations||Quantity: number of stations = 12|
|CTD stations||Quantity: number of stations = 1|
|Biology and fisheries|
|Eggs and larvae|
|Pelagic fish||Quantity: number of hauls = 8|
|Acoustic reflection on marine organisms.||Description: whole cruise|
|Geology and geophysics|
|Grab||Quantity: number of samples = 138|
Description: Day grabs