Browsing Brage IMR by Author "Nakken, Odd"
Now showing items 1-20 of 194
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Abundance and mortality of Northeast Arctic cod and haddock during their first years of life
Bogstad, Bjarte; Nakken, Odd; Eriksen, Elena; Marshall, C. Tara (ICES CM Documents;2010/C:04, Working paper, 2010)For Northeast Arctic cod and haddock in the Barents Sea, long time series of year-class abundance are available at several stages before they recruit to the fishery, i. e. before they reach age 3. Several studies have ... -
Abundance estimates of the spawning stock of blue whiting (Micromesistius poutassou (Risso, 1810)) in the area west of the British Isles in 1972-1974
Nakken, Odd; Buzeta, Ramon (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1975)An analysis is made on the blue whiting data from the echo surveys conducted during 1972-1974 for assessment of the spawning stock west of the British Isles. Acoustic data are evaluated using a length dependent density ... -
Abundance estimation of the spawning Lofoten cod 1971
Nakken, Odd; Blindheim, Johan (ICES CM documents, Working paper, 1971) -
Acoustic and Bottom Trawl Surveys; How Much Information Do They Provide for Assessing the Northeast Arctic Cod Stock?
Korsbrekke, Knut; Mehl, Sigbjørn; Nakken, Odd; Pennington, Michael (ICES CM documents, Working paper, 1999)Acoustic and bottom trawl surveys of the Northeast Arctic cod stock provide fishery independent estimates of trends in abundance and population characteristics. Given the recent uncertainties in the catch based assessment ... -
Acoustic applications in fisheries science: The ICES contribution
Fernandes, Paul G.; Gerlotto, Francois; Holliday, D. Vance; Nakken, Odd; Simmonds, E. John (ICES Marine Science Symposia, Conference object, 2002) -
Acoustic estimates of 0-group fish abundance in the Barents Sea and adjacent waters in 1992 and 1993
Nakken, Odd; Hylen, Arvid; Ona, Egil (PINRO-IMR Symposium, Conference object, 1995)Acoustic and biological data collected during the international O-group surveys in 1992 and 1993 were used to estimate the abundance of O-group fish of 4 species; cod, haddock, redfish and polar cod. The abundances of ... -
Acoustic estimates of spawning cod in the Lofoten area in 1982 and 1983
Nakken, Odd (PINRO-IMR Symposium, Conference object, 1984)The main spawning grounds for Arctic cod, the Lofoten area, were covered by acoustic surveys 7 times in 1983 and 12 times in 1983 during the prespawning and spawning season. The results indicated a spawning stock in the ... -
Acoustic estimates of spawning cod off Lofoten and Møre in 1982
Nakken, Odd; Godø, Olav Rune; Raknes, Askjell (ICES CM documents, Working paper, 1982)Acoustic surveys on spawning cod were carried out in Lofoten and off Møre in order to estimate the stock size and structure. The 1975 yearclass made up the bulk of the spawning stock in both areas. In the Lofoten area the ... -
Acoustic estimates of spawning cod off Lofoten and Møre in 1983
Nakken, Odd; Godø, Olav Rune; Raknes, Askjell (ICES CM documents, Working paper, 1983)Acoustic surveys on spawning cod were arried out in Lofoten and off Møre in order to estimate the stock size and structure. The 1975 year class made up the bulk of the spawning stock in both areas. In the Lofoten area the ... -
Acoustic estimates of spawning cod off Lofoten and Møre in 1984
Nakken, Odd; Godø, Olav Rune; Raknes, Askjell (ICES CM documents, Working paper, 1984)Acoustic surveys on northeast Arctic spawning cod were carried out in Lofoten and off Møre in March-April 1984 in order to estimate the stock size and structure. Within the investigated areas the total number at spawning ... -
Acoustic estimates of the Barents Sea capeling stock 1971-1976
Nakken, Odd; Dommasnes, Are (ICES CM documents, Working paper, 1977)The surveys were carried out in June and in August - October. No estimates were obtained for 0-group capelin. 1 year old capeling are grossly underestimated in June. To a lesser extent this is also the case for older ... -
Acoustic methods in studies of fish ecology
Nakken, Odd (ICES CM documents, Working paper, 1998)Systematic use of echo sounder in fisheries and marine science comrnenced in the 1930's and developed rapidly after World War II. During the 1950's and 1960's large scale echo surveys were carried out in many regions as a ... -
Akustiske og biologiske undersøkelser i Nordsjøen og Skagerak i februar - mars 1970
Hamre, Johannes; Nakken, Odd (Fisken og havet;1970 - Nr. 2, Journal article, 1970) -
Akustiske undersøkelser i Risør- og Kragerøområdet på den norske Skagerrakkysten
Gjøsæter, Jakob; Enersen, Kate; Enersen, Svein Erik; Nakken, Odd (Rapport fra forskningsstasjonen Flødevigen;1993 Nr.2, Working paper, 1993) -
Ambient temperature and distribution of northeast arctic cod
Ottersen, Geir; Michalsen, Kathrine; Nakken, Odd (ICES CM documents, Working paper, 1996)Most studies on the effects of field temperature on fish distribution and population parameters have considered the temperature and its variability at fixed stations or sections rather than the temperature in the actual ... -
Application of acoustic stock abundance estimation on capelin and blue whiting
Nakken, Odd; Midttun, Lars (ICES CM documents, Working paper, 1972) -
The application of an echo integration system in investigations on the stock strength of the Barents Sea capelin (Mallotus Villosus, Müller) 1971-1974
Nakken, Odd; Dommasnes, Are (ICES CM documents, Working paper, 1975) -
Bestandssituasjonen for torsken i Barentshavet og fisket i åra framover
Nakken, Odd (Other, 1982-03) -
Botnfiskundersøkingar i Barentshavet vinteren 1996
Mehl, Sigbjørn; Nakken, Odd (Fisken og havet, Research report, 1996)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 198 1 in the Barents Sea. The ...