Blar i Published in cooperation with others på forfatter "Nakken, Odd"
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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 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 ... -
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) -
Causes of trends and fluctuations in the Arcto-Norwegian stock
Nakken, Odd (ICES Marine Science Symposia, Conference object, 1994)Published information is used to review trends and fluctuations in landings and stock characteristics/variables (abundance, growth, maturation, distribution, and migrations) in relation to changes in environmental and ... -
Comparison of the capture efficiency of 0-group fish in pelagic trawls
Hylen, Arvid; Korsbrekke, Knut; Nakken, Odd; Ona, Egil (PINRO-IMR Symposium, Conference object, 1995)In 1992 and 1993 experiments were carried out during the international 0-group fish surveys in order to study the capture efficiency of two pelagic trawls. The catches of the standard sampling trawl were compared with ... -
Corrections of indices of abundance of 0-group fish in the Barents Sea for varying capture efficiency
Nakken, Odd; Raknes, Askjell (ICES CM documents, Working paper, 1996)Each year since 1965 "The International 0-group Survey in the Barents Sea and Adjacent Waters" has provided indices of abundance of 0-group fish. During the 30 years of operation of the survey large improvements in capture ... -
Counting of fish with an echo-integrator
Nakken, Odd; Midttun, Lars (ICES CM documents, Working paper, 1968) -
Distribution and abundance of 0-group Norway pout and haddock in the North Sea july - august 1978
Nakken, Odd; Rørvik, Carl Jakob (ICES CM documents, Working paper, 1979)In order to assess the 0-group abundance of Norway pout and haddock in the North Sea a combined acoustic/trawl survey was carried out in July - August 1978. The 0-group of both species were concentrated in a scattering ... -
The effects of IUU fishing (unreported catches) on stock assessments, predictions and management advice
Aglen, Asgeir; Nakken, Odd (IMR/PINRO joint report series, Conference object, 2005)