Cruise summary report
|Ship name (ship code)||Sunbeam (740P)|
|Cruise period||1984-08-01 — 1984-08-17|
|Port of departure||Lerwick, United Kingdom|
|Port of return||Lerwick, United Kingdom|
|Objectives||1. To carry out a bottom trawl survey to determine the distribution of 1-group and older sandeels (Ammodytes marinus) in Shetland Waters.
2. To collect data on length and age distribution by fishing grounds, depth of water, type of substrate, time of day and state of tide.
3. To collect samples of bottom sediment from trawling positions to determine particle size and suitability for sandeels.
4. To identify all fish species preying on sandeels and to determine the size preference of different predators.
5. To carry out a prelimiary investigation of the depth distribution of sandeels from echo-sounder records and observation of sea-bird feeding behaviour.
|Chief scientist||J A Gauld (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)|
|Cruise report||(0.14 MB)|
North East Atlantic Ocean (limit 40W)
|Specific||SE/N/SW Shetland, Foula, Brekkin, Balta, Fair Isle, Sands Voe, Bressay|
|Track charts||(00 MB)|
|Biology and fisheries|
|Demersal fish||Quantity: number of hauls = 81|
Description: A number of trawls were made using a standard sandeel trawl and of varying duration.
|Geology and geophysics|
|In-situ seafloor measurement/sampling||Quantity: number of samples = 22|
Description: A number of bottom sediment samples were collected from various sites.
|Multi-beam echosounding||Description: A number of echo-sounders were run throughout the cruise. No. of surveys not noted.|