Browsing ICES CM documents authored by IMR scientists (1949-2011) by Subject "VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452"
Now showing items 81-100 of 1026
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Climatic effects filtered through the food web affect the dynamics of Arcto-Norwegian cod
(ICES CM documents, Working paper, 2005)The world's largest cod stock, the Arcto-Norwegian cod (a.k.a. North-East Arctic cod), is heavily influenced by temperature in two ways: First, cod recruitment tends to be high when Barents Sea temperature in the spawning ... -
Climatic variations in the Barents Sea during the 1970`s
(ICES CM Documents;1984/GEN:15, Working paper, 1984) -
Coastal and fjord resources off Finnmark and Troms counties, Norway, based on the 1992 survey
(ICES CM Documents;1994/G:38, Working paper, 1994)In 1992 an acoustic survey in fjords and shelf areas off Finnmark and Troms, two counties in northern Norway, was made to estimate the total biomass of cod, haddoc, saithe, redfish species and herring to be 876.000 tonnes. ... -
Cod in a changing climate Match-mismatch and Threshold for the North Sea cod recruitment
(ICES CM documents;2005 / AA:01, Working paper, 2005)Climatic changes are disrupting otherwise tight trophic interactions between predator and prey. Most of the earlier studies have primarily focused on the temporal dimension of the relationship in the framework of the ... -
Combining hydrographical particles-tracking models with spatial analyses to evaluate spatial dynamics of cod larvae and 0-group in the Barents Sea
(ICES CM Documents;2009/C:06, Working paper, 2009)Recruitment ecology of cod has been an important focus within the framework of GLOBEC. A large part of this work focused on understanding the spatiotemporal component of cod populations. For the early pelagic life stages, ... -
Comparative analysis of split beam data
(ICES CM Documents;1988/B:44, Working paper, 1988)Split beam data can provide high quality, in situ, fish target strength estimates, however a careful calibration is required to realize this potential. In same cases a standard target has been used to make a large number ... -
Comparative growth and survival of two genetic strains of Atlantic cod (Gadus morhua L.) reared through the early life stages in a marine pond in western Norway
(ICES CM Documents;1990/F:48, Working paper, 1990)The investigation was carried out in a marine pond in western Norway during spring and summer 1990. Two genetic defined strains of Atlantic cod (Gadus morhua L.) were used as broodstocks. A total of 11.1 x 10^6 cod larvae ... -
Comparative habitat use and foraging behaviour of harbour seals and grey seals in Western Norway
(ICES CM Documents;1995/N:1, Working paper, 1995)Adult harbour seals at Froan nature reserve, Central Norway, were tagged with VHF radio tags and depthvelocity, hart rate and stomach temperature sensors combined with ultrasonic transmitters. An automatic shore based ... -
Comparison between "underway" and "on station" acoustic measurements made during bottom trawl surveys
(ICES CM Documents;2002/J:3, Working paper, 2002)It becomes in many cases, routine, to collect acoustic data during bottom trawl surveys, both during and between trawls providing “on station” and “underway” acoustic data. Still, the combination of trawl and acoustic data ... -
Comparison of 4 Northern Hemisphere regions: Ecosystem responses to recent oceanographic variability
(ICES CM documents;2007/D:07, Working paper, 2007)Ecosystem responses to oceanographic variability resulting from recent climate changes are compared and contrasted for four high latitude regions of the Northern Hemisphere, two in the Pacific (Bering Sea and Gulf of Alaska) ... -
Contaminants in the Barents Sea ecosystem
(ICES CM Documents;1995/Mini:9, Working paper, 1995)A baseline study of contaminants in fish and sediments from the Barents Sea was carried out by Institute of Marine Research (IMR) as a part of the Arctic Monitoring and Assessment Programme, AMAP. Sediment samples from ... -
Current measurements in the northeastern Barents Sea
(ICES CM Documents;1993/C:41, Working paper, 1993)The Institute of Marine Research (IMR) in cooperation with Knipowich Polar Reseach Institute of Marine Fisheries and Oceanography (PINRO), Murmansk, started in autumn 1991 a current measurement program in the strait between ... -
Data on the 1983 year class of Norwegian spring spawning herring from the period June 1985 -August 1986
(ICES CM Documents;1986/H:19, Working paper, 1986)This paper considers the distribution, growth and migration of the 1983 year class of Norwegian spring spawning herring. There are, at present, two geographical components of this year class, one component with a nursery ... -
Deepwater flowthrough as a temperature stabilizer in rearing of halibut (Hippoglossus hippoglossus) fry
(ICES CM Documents;1987/F:16, Working paper, 1987)Through the period of yolk sac absorption, halibut larvae were kept in plastic bags in plastic basins with flowthrough of deepwater. When maintaining sufficient flowthrough, in this period the temperature in the bags ... -
Demersal fish on the continental slope off Norway
(ICES CM documents;1975/F:29, Working paper, 1975)Investigations on distribution and abundance of demersal fish in 400-1000 m depth were carried out in three selected areas off Norway in July-August 1974. Based on catches in 48 hauls by bottom trawl and 3 long-line settings ... -
Density dependent catchability in bottom trawl surveys
(ICES CM Documents;1997/W:16, Working paper, 1997)Fish form schools, layer or patches in which the individual fish's behaviour is not independent of its neighbours movements. On the other hand, at low densities fish may have the freedom to act as single individuals ... -
Density driven currents in the Barents Sea calculated by a numerical model
(ICES CM Documents;1989/C:20, Working paper, 1989)A baroclinic, 3-D model is described. It is adapted to a Barents Sea situation in order to simulate the currents in this area. The model is of a so-called level type which contains fixed, but permeable levels. It also ... -
The design and use of a profiling instrument for measuring and recording physical variables in the sea
(ICES CM Documents;1977/C:22, Working paper, 1977)The paper describes a measuring system for profiling of the upper few hundred meters of the sea. The system consists of a recording instrument and a readout unit. The recording instrument has sensors for current, direction, ... -
Diet of harp seals (Phoca groenlandica) feeding between the breeding and moulting seasons in the southern Barents and White Seas
(ICES CM Documents;1993/N:8, Working paper, 1993)The harp seal Phoca groenlandica is the most abundant seal species in the Barents Sea. In order to evaluate the ecological importance of the species, diet studies have recently been carried out at various times of the ... -
Diet of polar cod, Boreogadus saida, in the Barents Sea related to fish size and geographical distribution
(ICES CM Documents;1990/G:48, Working paper, 1990)Polar cod stomachs collected during autumn of 1986-1988 in the Barents Sea were analysed. The results indicated that polar cod is an opportunistic feeder, and that the observed changes in feeding pattern from one region ...