ICES CM documents authored by IMR scientists (1949-2011): Nye registreringer
Viser treff 2881-2900 av 3138
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Stock size of north-east arctic cod, estimates from survey data 1983/84
(ICES CM documents, Working paper, 1984)Both the total and spawning stocks of North-East Arctic cod were assessed using Norwegian survey data and commercial landings. The total stock at 1 January was estimated to about 3250 million specimens, of which age group ... -
Growth of northeast arctic cod in relation to ambient temperature
(ICES CM documents, Working paper, 1996)In the present study temperature related changes in horizontal distribution are described and the influence of temperature on the growth of Northeast Arctic cod is interpreted. Data from acoustic-and bottom trawl surveys ... -
Length dependant corrections of survey estimates of cod and haddock in the Barents Sea
(ICES CM documents, Working paper, 1994)This paper describes an attempt to utilize new information on gear selectivity and fish target strength to improve time series of survey estimates. Swept area estimates and acoustic estimates of cod and haddock in the ... -
The application of an echo integration system in investigations on the stock strength of the Barents Sea capelin (Mallotus Villosus, Müller) 1971-1974
(ICES CM documents, Working paper, 1975) -
Stock size of north-east arctic cod, estimates from survey data 1982/83
(ICES CM documents, Working paper, 1983)Assessments of the total stock and spawning stock sizes of North-East Arctic cod were carried out on the basis of Norwegian survey data and commercial landings. The total stock at 1 January 1983, fish which was 2 years old ... -
On acoustic identification, sizing and abundance estimation of fish
(ICES CM documents, Working paper, 1970) -
Acoustic estimates of spawning cod off Lofoten and Møre in 1983
(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 ... -
On the problem of determining the relationship between integrated echo intensity and fish density
(ICES CM documents, Working paper, 1975) -
Application of acoustic stock abundance estimation on capelin and blue whiting
(ICES CM documents, Working paper, 1972) -
Abundance estimation of the spawning Lofoten cod 1971
(ICES CM documents, Working paper, 1971) -
Stock size of north-east arctic cod estimated from acoustic survey data 1982
(ICES CM documents, Working paper, 1982)Assessments of the total stock and spawning stock of North East Arctic cod were carried out on the basis of Norwegian survey data and commercial landings. The total stock, i.e. fish which was 3 years old and older at 1 ... -
Counting of fish with an echo-integrator
(ICES CM documents, Working paper, 1968) -
Preliminary reports of the Norwegian investigations on young cod and haddock in the Barents Sea during the winter 1984
(ICES CM documents, Working paper, 1984)An acoustic survey and a bottom trawl survey for cod and haddock were carried out in the Barents Sea during the winter 1984. The two surveys gave different results, both in absolute terms and when changes from the 1983 ... -
Distribution and abundance of 0-group Norway pout and haddock in the North Sea july - august 1978
(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 ... -
Acoustic estimates of spawning cod off Lofoten and Møre in 1982
(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 ... -
Preliminary report of the Norwegian investigations on young cod and haddock in the Barents Sea during the winter 1982
(ICES CM documents, Working paper, 1983)An acoustic survey and a bottow trawl survey for cod and haddock were carried out in the Barents Sea during the winter 1983. The two surveys gave different results. The acoustic survey showed a 50 % reduction from 1982 for ... -
Acoustic estimates of the Barents Sea capeling stock 1971-1976
(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 ... -
Report of the workshop on taxonomic quality issues in the DATRAS database (WKTQD)
(ICES CM documents, Working paper, 2007)Quality control of data collections is an issue of primary importance in conducting science and this is no different for surveys intended to monitor changes in fish abundance. Essentially, quality ... -
Predicting recruitment of 0-group gadoids in the Barents Sea - critical interaction between models and observations
(ICES CM documents, Working paper, 2007)The most important gadoid fish stocks of the Barents Sea spawn along the coast of Norway. The eggs, larvae and juveniles are transported northwards with the oceanic coastal currents from the spawning grounds towards their ... -
Angular distribution of overwintering Norwegian spring spawning herring
(ICES CM documents, Working paper, 1994)When plankton production drops off in the fall, adult Norwegian spring spawning herring migrate to two fiords in northern Norway with stable water masses with low temperature and predation. In the wintering areas, the ...