1. To investigate the orientation and behaviour of plaice in relation to bottom topography and near-bed currents using:-
(a) sector scanning sonar and transponding acoustic compass tags.
(b) sector scanning sonar, transponding acoustic tags and divers equipped with a 300 kHz hand held acoustic torch.
(c) direct observation and photography of small plaice confined on the seabed in a cage spanning several small sand ridges.
2. To retrieve spat collecting bags from a marked site in Start Bay and relay scallop spat in Salcombe estuary.
Geoffrey P Arnold (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Irish Sea and St. George's Channel
Quantity: number of deployments = 2 Description: 13 hours
Biology and fisheries
Other biological/fisheries measurement
Geology and geophysics
Description: Underwater TV used to observe isolated fish in the cage.