Browsing Brage IMR by Author "Iversen, Svein A."
Now showing items 21-40 of 75
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Havets ressurser og miljø 2006
Iversen, Svein A.; Fossum, Petter; Gjøsæter, Harald; Skogen, Morten D.; Toresen, Reidar (Fisken og havet, særnummer;1-2006, Research report, 2006-03) -
Hydrografiske undersøkelser og kartlegging av plankton og fiskefordeling i Nordsjøen og Norskehavet i juni - juli 1972
Iversen, Svein A.; Jakupsstovu, Stein Hjalti; Lahn-Johannessen, John; Danielssen, Didrik S. (Fisken og havet, Research report, 1974)In June—July 1972 R. V. «G. O. Sars» carried out a survey in the northern North Sea, Skagerrak and the adjacent waters of the Norwegian Sea. The general features of the hydrography was determined, the relative abundance ... -
Influence of climate on recruitment and migration of fish stocks in the North Sea
Svendsen, Einar; Aglen, Asgeir; Iversen, Svein A.; Skagen, Dankert W.; Smedstad, Odd M. (ICES CM Documents;1991/H:12, Working paper, 1991)For several decades one of the prime targets within fishery science has been to be able to understand and explain the great variability in the success of survival from egg to mature fish. One of the reasons why such effort ... -
Influx of Atlantic water and feeding migration of horse mackerel
Iversen, Svein A.; Skogen, Morten D.; Svendsen, Einar (ICES CM documents, Working paper, 1998) -
Innvirkning av små overtemperaturer på dødelighet og vekst hos I-gruppe rødspette (Pleuronectes platessa L.)
Danielssen, Didrik S.; Iversen, Svein A. (Fisken og havet - Serie B, Working paper, 1976) -
Interaction and integration of observation and models – the EcoFish approach
Godø, Olav Rune; Hauge, Kjellrun Hiis; Hjøllo, Solfrid Sætre; Iversen, Svein A.; Kjesbu, Olav Sigurd; Nash, Richard D.M.; Svendsen, Einar (ICES CM documents;2007/R:14, Working paper, 2007)Ecosystem approach to fisheries management demand new scientific approaches and tools. The EcoFish project is a recently established project that pursues the challenges set by the new approach. It aims at supporting ... -
Mackerel egg investigations in the North Sea
Iversen, Svein A.; Westgård, Trond (ICES CM Documents;1984/H:38, Working paper, 1984)This paper deals with the mackerel egg investigations in the North Sea in 1982 and 1983. The egg production is estimated by a computerized method. The confidence limits of the egg samples were estimated at 20-30%. The ... -
Makrell - biologi og bestander
Iversen, Svein A. (Havforskningsnytt, Working paper, 1992) -
Makrell i Oslofjordområdet: En oversikt over biologi og økonomisk betydning
Iversen, Svein A. (Fisken og havet - Serie B, Working paper, 1974) -
Makrellbestanden er i fare
Iversen, Svein A. (Havforskningsnytt, Working paper, 1996) -
Migration of western mackerel to the North Sea 1973 - 1988
Iversen, Svein A.; Skagen, Dankert W. (ICES CM Documents;1989/H:20, Working paper, 1989)The latest years, it is evident that most of the mackerel present in the North Sea belongs to the Western stock, since the yearly catches by far exceed the presumed size of the North Sea stock. The Norwegian tagging ... -
Norwegian sprat investigation in the North Sea in later years
Iversen, Svein A.; Ljøen, Rikard (ICES CM Documents;1984/H:37, Working paper, 1984)The variation in abundance and distribution of sprat during November 1979, January 1980, 1981 and 1982 is studied in relation to environmental factors. The main abundance of sprat was observed in waters with salinity ... -
On fecundity of North Sea mackerel (Scomber scombrus)
Borges, Maria Fatima; Iversen, Svein A.; Dahl, Oddvar (ICES CM Documents;1980/H:47, Working paper, 1980)This paper presents a preliminary analysis of the fecundity-length relationship of the North Sea mackerel. The relationship was compared to that of the Western mackerel stock (LOCKWOOD,1978) by an analysis of covariance ... -
The proceedings of the NORAD-Tanzania Seminar to Review the Marine Stocks and Fisheries in Tanzania, Mbegani, Tanzania, 6-8 March 1984
Iversen, Svein A.; Myklevoll, Sigmund (Conference object, 1984) -
Report on an acoustic survey for mackerel in the North Sea, Skagerrak and Kattegat in July - August 1987
Degnbol, P.; Iversen, Svein A.; Kirkegaard, E.; Lewy, P. (ICES CM Documents;1988/H:40, Working paper, 1988)An acoustic survey in the North Sea, Skagerrak and Kattegat was carried out in July-August 1987 by vessels from Denmark and Norway. This paper gives the distribution and the abundance estimates for mackerel. -
Report on assessment and management advice for 2004 of the anchovy fishery in the Yellow Sea
Hamre, Johannes; Iversen, Svein A.; Zhao, Xianyong (Working paper, 2004) -
Report on echo-integrator surveys for sprat undertaken in the North Sea during the 1981 -82 winter season.
Johnson, P.O.; Iversen, Svein A.; Edwards, J.I.; Bailey, R.S. (ICES CM Documents;1982/H:13, Working paper, 1982) -
Report on the 1985 ICES-coordinated herring acoustic survey in the northern North Sea
Simmonds, E. John; Bailey, R.S.; McKay, D.W.; Aglen, Asgeir; Iversen, Svein A. (ICES CM Documents;1986/H:16, Working paper, 1986) -
Size and condition of mackerel in research vessel trawl hauls versus commercial purse seine catches: implications for acoustic biomass estimation
Slotte, Aril; Skagen, Dankert W.; Iversen, Svein A. (ICES CM documents, Working paper, 2006)In September, after the summer feeding has ceased, the Northeast Atlantic mackerel (Scomber scombrus) stock tends to aggregate in ICES Area IVa before they start to migrate southwards in December-February towards the ... -
Size of mackerel in research vessel trawls and commercial purse-seine catches: implications for acoustic estimation of biomass
Slotte, Aril; Skagen, Dankert W.; Iversen, Svein A. (Journal article; Peer reviewed, 2007-04)In September after summer feeding has ceased, Northeast Atlantic mackerel (Scomber scombrus) tend to aggregate in ICES Area IVa before starting to migrate south towards the spawning grounds, between December and February. ...