ICES CM documents authored by IMR scientists (1949-2011): Nye registreringer
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Coastal releases of Atlantic salmon, a new model for salmon ranching in Norway
(ICES CM Documents;1991/M:38, Working paper, 1991)The present project is launched within the frame of a 7 year government funded programme to establish an additional livelihood for the coastal regions. The aim of the study is, through controlled experiments, to find ... -
Abundance estimation of schools using a fisheries sonar
(ICES CM Documents;1991/B:35, Working paper, 1991)An attempt of abundance estimation of fish schooling close to surface using sonar was conducted in Eastern North Sea - Skagerrak in September 1990. The method is based on measurements of the school area by the Furuno ... -
Report of the Planning Group on Acoustic Surveys in Sub-Area IV and Division IIIA [Aberdeen, 9- 10 January, 1991]
(ICES CM Documents;1991/H:40, Working paper, 1991) -
Report of the Workshop on the Applicability of Spatial Statistical Techniques to Acoustic Survey Data [Reykjavik, 5- 9 September, 1991]
(ICES CM Documents;1991/D:40, Working paper, 1991) -
Report of the Working Group on Genetics [Helsinki, 3- 6 June, 1991]
(ICES CM Documents;1991/F:45, Working paper, 1991) -
Impact of grazin from capelin (Mallotus villosus) on zooplankton: a case study in the northern Barents Sea in August 1985
(ICES CM Documents;1991/L:62, Working paper, 1991)The distribution of capelin was mapped in the area east of Hopen. Zooplankton was sampled with Juday net and 1m^2 MOCNESS sampler, and analyzed with respect to hydrography and capelin abundance. The capelin "front" ... -
Estimation of unreported catch in a commercial trawl fishery
(ICES CM Documents;1991/D:12, Working paper, 1991)The Institute of Marine Research (IMR), Bergen, has carried out combined bottom trawl and acoustic surveys for cod in the Barents Sea since 1981. Commercial statistics are collected routinely for this area through the ... -
Effects of a geophysical survey on catching success in longline fishing
(ICES CM Documents;1991/B:40, Working paper, 1991)The effects on longline catches of a geophysical survey conducted during the winter fishery for cod (Gadus morhua) were studied. Spatial extent of the effects was investigated by comparing the catch rates of longlines ... -
Deep towed vehicle for fish abundance estimation concept and testing
(ICES CM Documents;1991/B:53, Working paper, 1991)A research program was initiated in Norway in 1988 for measuring the abundance of fish resources at depth from 500 to 1000 metres. It was decided to develope a deep towed vehicle, to bring acoustic transducers down to ... -
Report of the Working Group on Pathology and Diseases of Marine Organisms [Ostend, 19- 22 February, 1991]
(ICES CM Documents;1991/F:42, Working paper, 1991) -
Estimated hatching date and growth history of Norwegian spring spawning herring (Clupea harengus L.) from otolith data of larvae of the 1990 yearclass
(ICES CM Documents;1991/H:14, Working paper, 1991)This study was performed on herring larvae of the 1990 yearclass of Norwegian spring spawners. The larvae were caught in May on the Norwegian shelf in the area from 64 °N - 69 °N. There was one size group of larvae with ... -
Vessel heave, and index for air bubble attenuation corrections
(ICES CM Documents;1991/B:37, Working paper, 1991)The possible use of vessel heave as a correction indicator for air bubble attenuation of acoustic signals from hull mounted transducers is investigated. Vessel heave was monitored along with the echo energy from the air ... -
Recatches of marked lobster, Homarus gammarus, released in 1988
(ICES CM Documents;1991/K:7, Working paper, 1991)A pilot scale release of juvenile lobsters, Homarus gammarus, was conducted at Austevoll, western Norway in August 1988. One and two year old lobsters were marked with a brand on either the carapace or the tail. The two ... -
Report of the North-Western Working Group [Copenhagen, 1- 8 May, 1991]
(ICES CM Documents;1991/Assess:21, Working paper, 1991) -
A method to reduce survey bottom trawl variability
(ICES CM Documents;1991/B:39, Working paper, 1991)A technique for limiting the variability of trawl doorspread is described. In addition, modifications of trawling technique which enable the doors to stay upright and maintain constant ground contact under different ... -
Report of the Study Group on Zooplankton Production
(ICES CM Documents;1991/L:32, Working paper, 1991) -
Report of the Mackerel Working Group [Copenhagen, 29 April - 8 May, 1991]
(ICES CM Documents;1991/Assess:19, Working paper, 1991) -
Report of the Study Group on Skagex [Moscow, 4- 9 February, 1991]
(ICES CM Documents;1991/C:1, Working paper, 1991) -
A PC-based echo integrator system appliable for school structure analyzis
(ICES CM Documents;1991/B:43, Working paper, 1991)A low cost system for integration of echo signals on a PC has been developed. The system calculates the area backscattering strength in surface and bottom layers, and is designed both for the purpose of conventional ... -
Screening for genetic markers to assess potential genetic impact from salmon ranching on wild stocks
(ICES CM Documents;1991/M:14, Working paper, 1991)Genetic markers are needed to assess the potential genetic impact on wild salmon populations from ocean ranching. In 1990 spawners from four Norwegian rivers: Lone, Vosso, Dale and Onarheim were screened for genetic ...