Browsing Brage IMR by Author "Dragesund, Olav"
Now showing items 1-20 of 61
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The biological effects of upwelling in the sea with special regard to fisheries
Dragesund, Olav (Fisken og havet;1971 - Nr. 2, Research report, 1971)This article is worked out on the basis of a theme given by the evaluation committee in connection with the present author's doctorate. The article gives a brief survey of the physical background for upwelling and the most ... -
Biology and population dynamics of the Norwegian spring- spawning herring
Dragesund, Olav; Hamre, Johannes; Ulltang, Øyvind (Journal article; Peer reviewed, 1980) -
The collapse of the Norwegian spring spawning stock
Dragesund, Olav; Ulltang, Øyvind (ICES CM Documents;1972/H:11, Working paper, 1972) -
Comparative analysis of year-class strength among fish stocks in the North Atlantic
Dragesund, Olav (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1971)A comparative analysis of year-class strength among stocks of abundant fish species (herring, cod, haddock, saithe, redfish and capelin) in the North Atlantic is given with a view to discussing whether covariation in ... -
The development of acoustic instrumentation in fisheries research and commercial fisheries in Norway
Dragesund, Olav; Midttun, Lars (ICES CM Documents;1966/F:8, Working paper, 1966) -
Distribution, abundance and mortality of young and adolescent Norwegian spring spawning herring (Clupea harengus Linné) in relation to subsequent year-class strength
Dragesund, Olav (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1970)1. The distribution of young and adolescent herring in coastal and offshore waters of northern Norway has been investigated for the 1959- 1965 year-classes by combined acoustic surveys and fishing experiments. 2. In the ... -
Estimates of stock size and reproduction of the Barents Sea capelin in 1970-1972
Dragesund, Olav; Gjøsæter, Jakob; Monstad, Terje (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1973)DRAGESUND, O., GJØSÆTER, J. and MONSTAD, T. 1973. Estimates of stock size and reproduction of the Barents Sea capelin in 1970-1972. FiskDir. Skr. Ser. HavUnders., 16: 105-139. The distribution and migration of young ... -
Factors influencing year-class strength of Norwegian spring spawning herring (Clupea harengus Linné)
Dragesund, Olav (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1970)1. Variation in year-class strength of Norwegian spring spawning herring is analysed in relation to the structure and the size of the spawning stock, the location and the time of spawning and environmental conditions during ... -
Fiskeriundersøkelser med F/F "G.O. SARS" i Irmingersjøen og norskehavet 28. juli - 21. august 1970
Blindheim, Johan; Bratberg, Erling; Dragesund, Olav (Fisken og havet;1971 - Nr.3, Research report, 1971)On the cruise R. V. «G. O. Sars» carried out an echo survey combined with trawling applying a technique described by Dragesund, Midttun and Olsen (1970). During the days 1—11 August a joint Icelandic—Norwegian survey was ... -
Forekomst av egg og larver av fisk i vest- og nordnorske kyst- og bankfarvann våren 1964
Dragesund, Olav (Fisken og havet;1965 - Nr. 1, Journal article, 1965) -
Forekomst av egg og yngel av fisk i vest- og nordnorske kyst- og bankfarvann våren 1963
Dragesund, Olav; Wiborg, Kristian Fredrik (Fisken og havet;1963 - Nr. 4, Journal article, 1963) -
Forekomst av egg og yngel av fisk i vest- og nordnorske kyst- og bankfarvann våren 1965
Dragesund, Olav (Fisken og havet;1966 - Nr.3, Research report, 1966) -
Forekomst av egg og yngel av fisk i vest- og nordnorske kyst- og bankfarvann våren 1966
Dragesund, Olav (Fisken og havet;1967 - Nr. 2, Research report, 1967) -
Further studies on stock size fluctuations and rate of exploitation of the Norwegian spring spawning herring, 1950 - 1971
Dragesund, Olav; Ulltang, Øyvind (ICES CM Documents;1973/H:19, Working paper, 1973) -
Habitat selection and competition amongst 0-group gadidae off Mid-Norway
Godø, Olav Rune; Sunnanå, Knut; Gjøsæter, Jakob; Dragesund, Olav (Working paper, 1988)Juvenile gadids and other co-occurring fishes were collected during August in the years 1981 to 1983 at the Møre coast (Mid-Norway). The gears used were pelagic trawl, bottom trawl, Danish seine and beach seine. All species ... -
Lodde- og polartorskundersøkelser i Barentshavet august - september 1970
Blindheim, Johan; Dragesund, Olav; Hognestad, Per T.; Midttun, Lars; Nakken, Odd (Fisken og havet;1971 - Nr.3, Research report, 1971)In the period 26 August to 11 September a joint Soviet - Norwegian 0-group fish survey was carried out in the Barents Sea (Anon. 1970). During this survey observations were also made on the distribution and abundance of ... -
Lodde- og polartorskundersøkelser i Barentshavet august-september 1970
Nakken, Odd; Blindheim, Johan; Dragesund, Olav; Hognestad, Per T.; Midttun, Lars (Journal article, 1971)In the period 26 August to 11 September a joint Soviet-Norwegian 0-group fish survey was carried out in the Barents Sea (ANON. 1970). During this survey observations were also made on the distribution and abundance of adult ... -
Lodde- og polartorskundersøkelser i Barentshavet august-september 1971
Dragesund, Olav; Nakken, Odd (Journal article, 1972)During August-September 1971 two subsequent series of observations were made on distribution and abundance of maturing capelin and polar cod in the Barents Sea. Abundance estimates for the two species indicated by echo ... -
Lodde- og polartorskundersøkelser i Barentshavet i august - september 1971
Dragesund, Olav; Nakken, Odd (Fisken og havet, Research report, 1972)During August—September 1971 two subsequent series of observations were made on distribution and abundance of maturing capelin and Polar cod in the Barents Sea. Abundance estimates for the two species indicated by echo ... -
Lodde- og polartorskundersøkelser i Barentshavet i august-september 1971
Dragesund, Olav; Nakken, Odd (Fisken og havet, Research report, 1972)During August-September 1971 two subsequent series of observations were made on distribution and abundance of maturing capelin and Polar cod in the Barents Sea. Abundance estimates for the two species indicated by echo ...