Browsing ICES CM documents authored by IMR scientists (1949-2011) by Subject "torsk"
Now showing items 61-80 of 174
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Mortality and injuries of haddock, cod and saithe escaping through codend meshes and sorting grids
(ICES CM documents, Working paper, 2002)Mortalities and injuries of the gadoids haddock (Melanogrammus aeglefinus L.), cod (Gadus morhua L.) and saithe (Pollachius virens L.) were studied after codend and grid escapement in two full scale trials in 2000 and 2001 ... -
North-East Arctic Fisheries Working Group : Report of the Meeting at Copenhagen, December 4th-14th 1967
(ICES CM Documents;1968/F:19, Working paper, 1968) -
Norwegian investigations on young cod and haddock in the Barents Sea during the winter 1982
(ICES CM documents, Working paper, 1982)An acoustic survey and a bottom trawl survey were carried out in the Barents Sea during winter 1982. Both surveys showed that there has been a reduction in the total number of cod of about 50% and about 75% for haddock in ... -
Norwegian investigations on young cod, haddock and redfish in the Barents Sea and adjacent waters 1970-1972
(ICES CM Documents;1972/F:38, Working paper, 1972) -
Observations from the Barents Sea in spring 1973 on the discarding of cod and haddock caught in bottom and midwater trawls fitted with double cod ends
(ICES CM Documents;1974/F:45, Working paper, 1974) -
Observations of cod behaviour reveal insights into the function and properties of the swimbladder under pressure
(ICES CM documents, Working paper, 2006)Atlantic cod (Gadus morhua L.) is a highly adaptive boreal species with a broad distribution through different ecosystems in the North Atlantic. Diet, environmental factors and population dynamics vary enormously ... -
On the Estimation of Cod and Haddock discarded by Trawlers using different Chafers
(ICES CM Documents;1965/167, Working paper, 1965) -
On the relation between ‘true’ numbers of Northeast Arctic cod and VPA- or survey-based abundance estimates
(ICES CM documents, Working paper, 2001)When assessing Northeast Arctic cod it is assumed that the estimates of numbers at age generated by a converged VPA type analysis are equal, on average, to the true numbers at age. Based on fishery independent survey ... -
Orientation measurements of cod in Lofoten obtained from underwater photographs and their relation to target strength
(ICES CM Documents;1971/B:17, Working paper, 1971) -
Physical oceanography of Atlantic cod habitats
(ICES CM documents, Working paper, 2005) -
The potential importance of the paternal contribution to the ‘Stock Reproductive Potential’ of North-East Arctic cod (Gadus morhua)
(ICES CM documents, Working paper, 2005)Over the years there has been a growing interest in determining the real stock reproductive potential (SRP) as a means of understanding the dynamics of a fish population. For the purposes of assessment the spawning stock ... -
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 ... -
Preliminary report of investigations of cod-eggs and larvae in the Lofoten area in the years 1968-1972
(ICES CM Documents;1974/F:37, Working paper, 1974) -
Prey selection of early juvenile cod (Gadus morhua L.) in the Barents Sea
(ICES CM documents, Conference object, 2006) -
Reaction norm analysis of fisheries-induced adaptive change and the case of the Northeast Arctic cod
(ICES CM documents, Working paper, 2002)We present a probabilistic concept of reaction norms for age and size at maturation, and outline methods that can be used for their estimation in typical fisheries data. Such estimations are critical for calibrating size- ... -
Reaction norms for age and size at maturation: study of the long-term trend (1970-1998) for Georges Bank and Gulf of Maine Atlantic cod stocks
(ICES CM documents, Working paper, 2002)Average age and size at maturation have decreased in many commercially exploited fish stocks during the last few decades. This phenomenon could be either a direct phenotypic response to some environmental variation, or the ... -
Recruitment of wild and artificially reared cod (Gadus morhua L.) to the local spawning stock
(ICES CM Documents;1987/F:27, Working paper, 1987)A stock enhancement study of coastal cod was initiated in 1983, when 19,002 artificially reared cod fry were tagged and released in the Austevoll region in western Norway. As a part of this program, 3,946 cod fry were ... -
Recruitment of young Arcto-Norwegian cod and haddock in relation to parent stock size
(ICES CM Documents;1970/Sy:19, Working paper, 1970) -
The relation between fishing mortality on juveniles and total yield of Arcto-Norwegian cod
(ICES CM Documents;1973/F:41, Working paper, 1973) -
Relationship between atresia, fish size and condition in Icelandic cod (Gadus morhua L.)
(ICES CM documents, Working paper, 2001)Cod is a determinate spawner, with a high potential fecundity. That is, a large definite number of oocytes start maturing prior to spawning. Environmental factors, such as water temperature and food availability have ...