Browsing ICES CM documents authored by IMR scientists (1949-2011) by Subject "torsk"
Now showing items 141-160 of 174
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The reproduction of cod (Gadus morhua L), with special reference to the Arcto-Norwegian and Baltic populations
(ICES CM Documents;1972/F:44, Working paper, 1972) -
The response of Atlantic cod (Gadus morhua) to future climate change
(ICES CM documents, Working paper, 2005) -
Results of investigations of migration pattern of artificially reared coastal cod (Gadus morhua L.) in western Norway
(ICES CM Documents;1987/F:26, Working paper, 1987)Investigations of the migration pattern have been a central part in an ongoing enhancement study of cod in western Norway. In Sept. - Nov. 1983, 20,947 juvenile, basin-reared cod fry were tagged and released at three sites ... -
The Role of Cod in the Ecosystem
(ICES CM documents, Working paper, 2005) -
Scale damage and survival of cod and haddock escaping from a demersal trawl
(ICES CM Documents;1991/B:44, Working paper, 1991)Cod (Gadus morhua L.) and haddock (Melanogrammus aeglefinus L.) escaping through the meshes of a cod-end (135 mm diamond meshes) or through a metal grid sorting device mounted in the foremost part of the cod-end, were ... -
Seasonal variability in cod target strength
(ICES CM documents, Working paper, 2006)The acoustic target strength of adult cod (Gadus morhua) was measured ex situ in a large, 4500 m3, experimental net pen at the IMR Austevoll aquaculture station in eight periods between November 1996 and May 1998. A ... -
Seasonal variation of the diet of cod (Gadus morhua L.) and haddock (Melanogrammus aeglefinus L.) at a herring spawning ground
(ICES CM Documents;1992/G:9, Working paper, 1992)The paper describes diet variation of cod and haddock at a spawning ground of the Norwegian Spring Spawning Herring. Samples were collected at bimonthly intervals through a one-year period, including during and following the ... -
Sexual experience in cod (Gadus morhua L.) and haddock (Melanogrammus aeglefinus L.)
(ICES CM Documents;1983/G:39, Working paper, 1983) -
Size of spawning Arcto-Norwegian cod (Gadus morhua L.) and the effects on their eggs and early larvae
(ICES CM Documents;1993/G:41, Working paper, 1993)Using a new method for determining the stage of spawning in batch spawners, a positive correlation between the length of Arcto-Norwegian cod females, having spawned 25-75% of their eggs, and the egg diameter was established. ... -
Some aspects of the interrelation between the herring in the Norwegian Sea and the stocks of capelin and cod in the Barents Sea
(ICES CM Documents;1988/H:42, Working paper, 1988)The paper reviews the life history and exploitation of the Norwegian spring spawning herring, the Barents Sea capelin and the north-east Arctic cod. On this basis and from relevent knowledge of climatic conditions, the ... -
Some environmental factors that influence the growth of Arcto-Norwegian cod from the early juvenile to the adult stage
(ICES CM documents, Working paper, 2000)A high growth rate for Arcto-Norwegian cod (Gadus morhua L.) in the Barents Sea and adjacent areas from the larval stage to the 0-group stage enhances survival and ultimately recruitment to the fishery. However, it appears ... -
Some possible explanations to Baltic cod (Gadus morhua L.) reproduction disturbances with special emphasis on lipids - an overview
(ICES CM Documents;1999/U:5, Working paper, 1999)Disturbances in Baltic cod reproduction, additional to the basic problems related to low salinity and oxygen content, are discussed. Abnormal cod embryos appeared first in 1979 and have been observed since. Still recruitment ... -
Spatial patterns of age-0 cod survival in the Barents Sea
(ICES CM documents, Working paper, 2005)Apart from human harvest, recruitment dynamics is conceivably recognized as the main source of population variability of marine fish stocks. Factors affecting recruitment dynamics can change over both temporal and spatial ... -
Spawning strategy and a mechanism for adaptive larval production in Arcto-Norwegian cod
(ICES CM Documents;1990/L:100, Working paper, 1990)The Arcto-Norwegian cod is spawning in the temperature stable Atlantic water, and the eggs ascend into the more temperature variable coastal water. Changes in time of peak spawning, up to 10 days within the last 60 ... -
Studies on associations between genotypes and growth rate of 0-group cod
(ICES CM Documents;1992/G:66, Working paper, 1992)The aim of the present study was to investigate genotype dependent growth rate in young cod. The material of 0-group cod was collected from pond produced cod in western and northern Norway, and analysed for genotype ... -
Systematic bias in estimates of reproductive potential of cod stocks: implications for stock/recruit theory and management
(ICES CM documents, Working paper, 2005)Stock/recruit relationships, describing the relationship between the parental population and the number of offspring produced, are a central tool in population ecology. For fish populations the stock/recruit relationship ... -
Tagging experiment results on cod in western Norway fjord areas
(ICES CM Documents;1986/G:80, Working paper, 1986)During recent years, experiments with large scale release of artificially produced Q-group cod at locations in western Norway waters have been carried out with the aim ofincreaseing the cod catches. As the general ... -
Tank observations of prawns and small cod in relation to a moving model trawl
(ICES CM Documents;1976/B:29, Working paper, 1976) -
The effects of maternal status of Arcto-Norwegian cod on egg quality and vitality of early larvae. 1. The collection and characteristics of the cod females, a pilot study
(ICES CM Documents;1992/G:78, Working paper, 1992)On the basis of a new field method to determine the stage of spawning, egg groups from Arcto-Norwegian cod females in different stage of spawning were selected for further studies on egg quality and vitality of early ... -
The effects of maternal status of Arcto-Norwegian cod on egg quality and vitality of early larvae. 2. Preliminary results of the experiment in 1992
(ICES CM Documents;1992/G:79, Working paper, 1992)The stage of spawning of females of the Arcto-Norwegian cod caught during peak spawning in Lofoten had a profound effect on several vital parameters of the eggs and larvae. Significant negative correlations were ...