Blar i Brage IMR på forfatter "Nakken, Odd"
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Bruk av ekkolodd i havforskning [fra foredrag på ressurskurs arrangert av Norges Fiskerihøgskole og Norges Fiskarlag]
Nakken, Odd (Lecture, 1976-12) -
Bunnfiskundersøkelser i Barentshavet sommeren 1995
Aglen, Asgeir; Nakken, Odd (Fisken og havet, Research report, 1996)The report presents the results from the first in a series of surveys which the Institute of Marine Research (IMR) has inititated in order to monitor the stocks of demersal fish in the Barents Sea area. The survey was ... -
Bunnfiskundersøkelser i Barentshavet vinteren 1993
Korsbrekke, Knut; Mehl, Sigbjørn; Nakken, Odd; Nedreaas, Kjell (Rapport fra senter for marine ressurser;Nr. 14 - 1993, Working paper, 1993) -
Bunnfiskundersøkelser i Barentshavet vinteren 1994
Mehl, Sigbjørn; Nakken, Odd (Fisken og havet, Research report, 1994)A combined acoustic and bottom trawl survey aiming at obtaining indices of abundance and estimates of length and weight at age has been carried out each winter since 1981 in the Barents Sea. The target species are cod ... -
Bunnfiskundersøkelser i Barentshavet vinteren 1995
Korsbrekke, Knut; Mehl, Sigbjørn; Nakken, Odd; Sunnanå, Knut (Fisken og havet, Research report, 1995)Et kombinert akustikk- og bunntråltokt med sikte på å framskaffe mål for tallrikhet og utbredelse hos torsk, hyse, blåkveite og uerartene, samt lengde og vekt ved alder for torsk og hyse, er gjennomført siden 1981. ... -
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 ... -
Changes in stock abundance (Rapporteur's report) [fra foredrag på "a workshop on comparative biology, assessment and management of gadoids from the North Pacific and Atlantic oceans" 24-28 June, 1985 Seattle, Washington]
Nakken, Odd (Proceedings: Part III, Conference object, 1986) -
A comparison between two sonic measuring systems for demersal fish
Dowd, R. G.; Bakken, Erling; Nakken, Odd (Peer reviewed; Journal article, 1970)Two sonic methods for estimation of abundance of fish stocks, the echo integrator and the digital counter methods, were compared on single and schooling fish in the Lofoten area of Norway during March 1969. Good correlation ... -
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 ... -
A comparison of the reliability of acoustic estimates of fish stock abundances and estimates obtained by other assessment methods in the northeast Atlantic
Nakken, Odd; Ulltang, Øyvind (Symposium on Fisheries Acoustics, Bergen, June 21-24, 1982, Conference object, 1982) -
The construction of a multi-species model for the Barents Sea with special references to the cod-capelin interactions [fra foredrag på "a workshop on comparative biology, assessment and management of gadoids from the North Pacific and Atlantic oceans" 24-28 June, 1985 Seattle, Washington]
Mehl, Sigbjørn; Nakken, Odd; Tjelmeland, Sigurd; Ulltang, Øyvind (Proceedings: Part III, Conference object, 1986) -
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) -
Det biologiske grunnlag for forvaltningen av fiskeressursene
Nakken, Odd (Journal article, 1987-11) -
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 ... -
Dorsal aspect target strength functions of six fishes at two ultrasonic frequencies.
Foote, Kenneth G.; Nakken, Odd (Fisken og havet serie B, Working paper, 1978)The dorsal aspect target strength functions of six fishes at two ultrasonic frequencies are presented in tabular and graphical form. Each table presents the value of the target strength function for tilt angles ranging ... -
Echo abundance indices of 0-group fish in the Barents Sea 1965-1972
Haug, Anders; Nakken, Odd (Symposium on acoustic methods in fisheries research, Bergen, Norway, 19-22 June, 1973, Conference object, 1973) -
Echo abundance indices of 0-group fish in the Barents Sea, 1965-1972
Haug, Anders; Nakken, Odd (Journal article; Peer reviewed, 1977)In order to obtain estimates of year class strength of 0-group fish, joint international surveys have been conducted each year since 1965 in the Barents Sea. The density of fish has been estimated by visual grading of the ... -
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)