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Toktrapport [21/7 - 1/8, 1980]
([Toktrapport/Havforskningsinstituttet];, Working paper, 1980)
An acoustic survey on 0-group gadoids in the northern North Sea and the Shetland-Orkney area, July 1984
(ICES CM Documents;1985/G:17, Working paper, 1985)
An acoustic survey was carried out by two research vessels in July 1984 to assess the distribution and abundance of 0-group gadoids. The 0-groups were distributed in scattering layers by night and in schools by day. ...
Report on the 1984 herring acoustic survey in the northern North Sea
(ICES CM Documents;1985/H:34, Working paper, 1985)
Toktrapport [10/7 - 1/8, 1984]
([Toktrapport/Havforskningsinstituttet];, Working paper, 1985-01-07)
Toktrapport [15/7 - 31/7, 1983]
([Toktrapport/Havforskningsinstituttet];, Working paper, 1983-09-01)
Leitetjeneste og gjenfangst av merket sild ved Shetland: 12 Juni - 3 Juli, 1984
([Toktrapport/Havforskningsinstituttet];, Working paper, 1984-08-28)
Investigations on demersal fish in the Barents Sea winter 2002 : detailed report
(IMR/PINRO joint report series6 - 2002, Research report, 2002)
A combined acoustic and bottom trawl survey to obtain indices of abundance and estimates of length and weight at age has been carried out each winter (4-6 weeks in January- March) since 1981 in the Barents Sea. The target ...
Swimming behaviour of fish schools in the North Sea during acoustic surveying and pelagic sampling trawling
(ICES CM Documents;1990/B:38, Working paper, 1990)
Swimming behaviour of schooling herring, mackerel and sprat, when approached by a survey vessel, was observed by aid of a true motion sonar. Observations were made both during surveying and during pelagic trawling. Horizontal ...
Relationships between the geometric dimensions and biomass of schools
(ICES CM Documents;1990/B:41, Working paper, 1990)
Acoustic measurements of the geometric dimensions and packing density of herring, sprat and saithe schools have been conducted by multi-beam sonars and echo integrator systems. Relationships between the reflected echo ...
Report on herring acoustic surveys in northern and central North Sea during summer 1987
(ICES CM Documents;1988/H:37, Working paper, 1988)
Acoustic surveys covering the Northern and Central North Sea were carried out by Scottish and Norwegian vessels during the period 24 June to 11 August. The estimated biomass of mature herring was 817 000 tonnes. For ...