Browsing Brage IMR by Author "Danielssen, Didrik S."
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Hydrografisk variabilitet i tid og rom i Skagerrak
Ottersen, Geir; Søiland, Henrik; Svendsen, Einar; Danielssen, Didrik S. (Fisken og havet, Research report, 2003)This report addresses the tempora1 and spatial variability in the hydrography of the Skagerrak by means of statistical investigations including frequency analyses and spatial correlations. The analysis is based on the fixed ... -
Hydrografiske undersøkelser og kartlegging av fiskefordeling i Nordsjøen i februar 1972
Bakken, Erling; Lahn-Johannessen, John; Ljøen, Rikard; Østvedt, Ole Johan; Danielssen, Didrik S. (Fisken og havet, Research report, 1973)The present report outlines the results of a survey carried out by R. V. "G. O. Sars" and R. V. "Johan Hjort" in February 1972. The distribution and relative abundance of fish in the North Sea were mapped on the basis of ... -
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 ... -
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) -
Investigations on herring, Clupea harengus L., from the Norwegian Skagerak Coast during the years 1963-64
Danielssen, Didrik S. (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1969)1) The material was collected on a little part of the Norwegian Skagerak coast in 1963-1964. 2) The following data were sampled: total length and weight, stage and weight of gonads, intestinal fat content, vertebrae ... -
Langtransporterte tilførsler av næringssalter til Ytre Oslofjord 1996-2006
Aure, Jan; Danielssen, Didrik S.; Magnusson, Jan (Fisken og havet;4-2010, Research report, 2010-10-22)The mean winter/spring contributions of nitrate and phosphate from the German Bight to the coastal water (5 - 30 m) outside the Oslofjord during the period 1996-2006 were estimated to respectively 70 % and 40 %. In the ... -
Larval and small juvenile cod Gadus morhua concentrated in the highly productive areas of a shelf break front
Munk, Peter; Larsson, Per Olov; Danielssen, Didrik S.; Moksness, Erlend (Journal article; Peer reviewed, 1995-09-14)The early life of cod was studied during a survey programme covering the northeastern North Sea, the Skagerrak and the Kattegat in May 1992. Our aim was to asses the interrelated effects of physical and biological factors ... -
A long-term perspective on the Chrysochromulina bloom on the Norwegian Skagerrak coast 1988: a catastrophe or an innocent incident?
Gjøsæter, Jakob; Lekve, Kyrre; Stenseth, Nils Christian; Leinaas, Hans Petter; Christie, Hartvig; Dahl, Einar; Danielssen, Didrik S.; Edvardsen, Bente; Olsgard, Frode; Paasche, Eystein (Journal article; Peer reviewed, 2000-11-22)The long-term effects of the 1988 algal bloom (Chrysochromulina polylepis Manton et Parke) along the Norwegian Skagerrak coast are evaluated and discussed on the basis of several monitoring programmes. Effects on individual ... -
Mass occurrence of (Gyrodinium aureolum) Hulburt and fish mortality along the southern coast of Norway in September-October 1981
Dahl, Einar; Bøhle, Bjørn; Danielssen, Didrik S. (ICES CM Documents;1982/L:56, Working paper, 1982) -
Mass occurrence of Gyrodinium aureolum Hulburt and fish mortality along the southern coast of Norway in September-October 1981
Dahl, Einar; Danielssen, Didrik S.; Bøhle, Bjørn (Flødevigen rapportserie, Research report, 1982)At the end of September 1981 the sea appeared "coffee brown" along the southern coast of Norway due to mass occurrence of Gyrodinium aureolum Hulburt. The maximum cell concentration observed was 70*10^6 cells*1^-1. When ... -
Miljøtilstanden i Ytre Oslofjorden
Aure, Jan; Berge, Jon Arthur; Beyer, Fredrik; Danielssen, Didrik S.; Enersen, Kate; Enersen, Svein Erik; Gjøsæter, Jakob; Johannessen, Einar; Rygg, B.; Torstensen, Else; Tveite, Stein (Interne notat;Nr. 13-1997, Working paper, 1997-12-02)Undersøkelser med bunntrål, akustikk og prøvetaking med grabb bIe gjennomført med Michael Sars i perioden 2-3 november og G.M.Dannevig i perioden 12-19 november 1997. Materialet fra bunntrål og akustiske survey som er ... -
Miljøtokt i Skagerrak, Kattegat og østlige Nordsjøen [14/4 - 2/5, 2004]
Danielssen, Didrik S.; Naustvoll, Lars-Johan ([Toktrapport/Havforskningsinstituttet];Nr. 8 - 2004, Working paper, 2004) -
Miljøtokt i Skagerrak, Kattegat og østlige Nordsjøen [19/4 - 8/5, 2005]
Danielssen, Didrik S.; Naustvoll, Lars-Johan ([Toktrapport/Havforskningsinstituttet];Nr. 16 - 2005, Working paper, 2005) -
Miljøundersøkelser i norske fjorder: Grenlandsfjordene 2000-2009
Aure, Jan; Danielssen, Didrik S. (Fisken og havet;3-2011, Research report, 2011-06-06)The local input of antrohropogenic nutrients increased winter and summer values of nitrate and summer values of chlorophyll-a in the Grenland fjords. In the upper layer of the Frierfjord, the Brevikfjord and rhe Eidangerfjord ... -
Miljøundersøkelser i norske fjorder: Ytre Oslofjord 1937-2011
Aure, Jan; Danielssen, Didrik S.; Naustvoll, Lars-Johan (Fisken og Havet;5-2014, Research report, 2014-05-12)In the surface layer in Outer Oslofjord autumn temperatures were 2 - 4 °C above normal between 1996 and 2011 and summer temperatures (august) in 1995, 1997, 2002, 2004 and 2006 (19-21°C) were unormal high (19-21°C). In ... -
New perspectives on fish movement: kernel and GAM smoothers applied to a century of tagging data on coastal Atlantic cod
Espeland, Sigurd Heiberg; Olsen, Esben Moland; Knutsen, Halvor; Gjøsæter, Jakob; Danielssen, Didrik S.; Stenseth, Nils Christian (Journal article; Peer reviewed, 2008-12-09)Tagging–recovery studies have been used successfully on many occasions, and the data analysed in a variety of ways with respect to fish movement. Here we provide a synoptic account of useful statistical techniques for ... -
On the migrations of the cod in the Skagerak shown by tagging experiments in the period 1954-1965
Danielssen, Didrik S. (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1969)1. A total of 1,244 cod was tagged from 1954 to 1965. The recapture percentage from the different tagging years varied between 24.9 aid 35.6 with a mean of 29.5 for the whole period. 2. No cod has been recaptured on the ... -
A preliminary report on studies of esterase phenotypes in herring
Nævdal, Gunnar; Danielssen, Didrik S. (ICES CM Documents;1967/H:24, Working paper, 1967) -
Production of juvenile flatfish species in different sized mesocosms
Berg, Leif; Baarøy, V.; Danielssen, Didrik S.; van der Meeren, Terje; Naas, Kjell Emil; Senstad, K.; Øiestad, Victor (ICES CM Documents;1985/F:65, Working paper, 1985)Mesocosm studies with larvae of halibut (Hippoglossus hippoglossus), sole (Solea solea) and turbot (Scophthalmus maximus) was carried out at Austevoll Aquaculture Station and at Flødevigen Biological Station in 1985. ... -
Recruitment of cod (Gadus morhua), whiting (Merlangius merlangus) and pollack (Pollachius pollachius) in the Risør area on the Norwegian Skagerrak coast 1945 to 1985. In: Flødevigen rapportserie no 1, 1990
Gjøsæter, Jakob; Danielssen, Didrik S. (Flødevigen rapportserie, Research report, 1990)0-group gadoids and other fishes from the shallow water zone were sampled with a beach seine at 22 fixed localities in the Risør area at the Norwegian Skagerrak coast. A series of 41 years (1945 - 85) has been analysed. Cod, ...