1. To conduct an acoustic survey to estimate the abundance and distribution of herring in the north western North Sea and west of Scotland (ICES area VIaN) as part of the ICES International North Sea Herring Acoustic Survey.
2. To obtain samples of herring for biological analysis, including age, length, weight, sex, maturity and ichthyophonus infection.
3. To obtain samples of herring in support of the WESTHER project (biological and photographic data).
4. To collect passive acoustic data for the detection of cetaceans.
Paul G Fernandes (Fisheries Research Services Aberdeen Marine Laboratory)
North Sea Inner Seas off the West Coast of Scotland
north western North Sea; west of Scotland and the Minches
Biology and fisheries
Quantity: number of deployments = 37 Description: Trawls containing herring. 2321 herring sampled for weight, sex, maturity and otoliths.
Quantity: number of hauls = 42 Description: A transect survey commenced in the North Minch to obtain data on the distribution of herring.
Acoustic reflection on marine organisms.
Quantity: track kilometres = 4630 Description: 2500 Nautical miles of acoustic data (1051 log intervals)
Quantity: number of measurements = 3 Description: In Loch Eriboll calibration of three transducers was carried out.
Other biological/fisheries measurement
Quantity: number of measurements = 505 Description: digital photographs and biological samples herring (455 adults and 50 juveniles)