Blar i ICES CM documents authored by IMR scientists (1949-2011) på emneord "VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924"
Viser treff 201-220 av 493
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Preliminary results of investigations on escapement of fish under the fishing line of a Norwegian sampling trawl
(ICES CM Documents;1986/B:30, Working paper, 1986)The Institute of Marine Research, Bergen, has carried out combined bottom trawl and acoustic surveys for cod and haddock in the Barents Sea and the Svalbard areas since 1981. These investigations have clearly demonstrated ... -
Preliminary results of saithe tagging experiments on the Norwegian coast 1975-77
(ICES CM Documents;1981/G:35, Working paper, 1981)In 1975-77, 18 942 saithe were tagged on the Norwegian coast, a continuation of a tagging program which started in 1972. The results confirm the migration pattern indicated by experiments in 1970-74. There is a substantial ... -
Preliminary studies on the influence of bottom obstructions and topography on the availability of demersal fish for gillnet fishing in the North Sea.
(ICES CM Documents;1979/B:21, Working paper, 1979)Gillnet fishing experiments were carried out in the Little Fisher Bank area in the North Sea. Saithe and pollack and to some extent cod showed a patchy distribution along a gillnet string. The abundance of fish was ... -
Preliminary Tests of a Shrimp-fish Separator Section for Use in Shrimp Trawls
(ICES CM Documents;1984/B:12, Working paper, 1984)A prototype shrimp-fish separator to be installed between the body and codend of a shrimp trawl was designed and constructed. The separator uses large square meshes to provide an escape path for fish, while funnels ... -
Programs for handling and analysis of stomach contents data
(ICES CM Documents;1982/H:21, Working paper, 1982) -
Qualitative contrast comparisons of differently coloured gillnets.
(ICES CM Documents;1979/B:20, Working paper, 1979)A regularly returning problem for Norwegian gill net manufacturers has been that fishermen often change their fancy for gill net colours, and also that fishermen from different districts have separate colour preferences. ... -
Quality assurance framework – the concept of quality assurance applied to fisheries data and its operationalisation under the ICES scope.
(ICES CM documents;2009/N:06, Working paper, 2009) -
Quantifying the amount of fish unavailable to a bottom trawl by use of an upward looking transducer
(ICES CM documents, Working paper, 1999)When surveying demersal fish with a wide and variable vertical distribution, it is desirable to combine information from a bottom trawl survey with the information from a hydroacoustic survey into an absolute abundance ... -
Random effects modeling in fisheries science using AD Model Builder
(ICES CM documents;2007/O:42, Working paper, 2007) -
Reactions of herring to trawling noise
(ICES CM Documents;1988/B:36, Working paper, 1988)The reaction of herring during pelagic trawl sampling has been studied by use of a high-frequency scanning sonar mounted on the headline of the trawl. The difficulties of obtaining high catch rates on shallow herring ... -
Recent developments on blue whiting trawls in Norway.
(ICES CM Documents;1979/B:24, Working paper, 1979)Two new blue whiting trawls with very large meshes in the front part have been tested with regard to towing resistance, operational qualities and catching efficiency. The results confirm that the large mesh design is quite ... -
Recent experiments with net of hexagonal meshes in purse seines.
(ICES CM Documents;1980/B:25, Working paper, 1980) -
Recommendations for the collection of multifrequency acoustic data
(ICES CM Documents;2004/R:36, Working paper, 2004)Traditionally, collection of acoustic data has been optimised for a single frequency, while requirements for the optimal combination of multifrequency data has been given less attention. Even though data manipulation can ... -
Reduced bycatch of red king crab (Paralithodes camtschatica) in the cod gillnet fisheries in northern Norway: Fishing trials with norsel mounted gillnets
(ICES CM documents, Working paper, 2000)Bycatch of red king crab (Paralithodes camtschatica) in stationary fishing gears, q&ally gillnets, is an increasing problem to the inshore fishermen in the northern part of Norway (Finnmark county). The results are large ... -
Reduction of fish bycatch in shrimp trawl using a solid separator grid in the aft belly
(ICES CM documents;1990/B:47, Working paper, 1990)During 1989-90 a new concept to avoid bycatch of fish in shrimp trawl has been developed in Norway. The system consists of an aluminium grid, 0.6 - 1.0 m wide and 1.3 - l.5 m long, with bars spaced 19 mm. The grid is ... -
Relation of maximum and average target strengths for the same fish
(ICES CM documents, Working paper, 1987)The relation is studied by means of tabulated measurements of the tilt angle dependence of target strength for three gadoid species. The dependence of the difference target strength on fish length is statistically ... -
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 ... -
The relative frequency response, as derived from individually separated targets on cod, saithe and Norway pout
(ICES CM documents, Working paper, 2004)The relative frequency response is an important acoustic feature used to characterise acoustic targets. This response has been defined as the sv, volume backscattering coefficient, for a specific frequency relative to ... -
Report - ICES-EuroGOOS Planning Group on the North Sea Pilot Project [Bergen, Norway, 27 February - 1 March, 2002]
(ICES CM Documents;2002/C:2, Working paper, 2002) -
Report by special joint session on the methods for observing gear and the reactions of fish to gear
(ICES CM Documents;1976/B:3, Working paper, 1976)