ICES CM documents authored by IMR scientists (1949-2011): Nye registreringer
Viser treff 861-880 av 3138
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Field experiences with a new miniature vector averaging current meter
(ICES CM Documents;1991/C:20, Working paper, 1991)For several years Inst. of Marine Research Bergen has been developing miniaturized modular current meters. Thanks to major improvements in electronic component technology in recent years, a physically small current meter ... -
Report of the Study Group on Cod Stock Fluctuations [Hamburg, 16- 18 April, 1991]
(ICES CM Documents;1991/G:78, Working paper, 1991) -
Voice controlled form filling
(ICES CM Documents;1991/C:22, Working paper, 1991)During field work in the sea - in particular when collecting data like weight, length, sex, stadium, etc. from fish samples, the observations are first manually noted in a standardized sampling form. One popular form ... -
Manual for the ICES North Sea Stomach Sampling Project in 1991 [Aberdeen, 8- 10 January, 1991]
(ICES CM Documents;1991/G:3, Working paper, 1991) -
Abundance estimation of pelagic fish stocks by acoustic surveying
(ICES CM Documents;1991/B:33, Working paper, 1991)The echo integration technique is outlined. Weaknesses are identified and remedies described. While the technique is adequate for surveying some stocks, improvements are necessary for its proper application to others. ... -
The daily feeding dynamics in various lenght groups of the Barents Sea capelin during the feeding period
(ICES CM Documents;1991/H:16, Working paper, 1991)A total of 700 capelin stomachs collected during the feeding period in August 1989 by 24-h fishery were analyzed for each 3-cm length groups. The number of prey categories consumed by the Barents sea capelin showed a ... -
The potential of the Jutland coastal current as a transporter of nutrients to the Kattegat
(ICES CM Documents;1991/C:34, Working paper, 1991)Annual fluctuations and distributions of nitrate during the 1980s in areas along the Danish west coast and in the northern Kattegat have been examined and compared. Transport of nitrate brought about by the Jutland ... -
The egg production and spawning stock size of the North Sea mackerel stock in 1990
(ICES CM Documents;1991/H:11, Working paper, 1991)During the period 12 March to 20 July 1990 the spawning area of the North Sea mackerel was investigated by research vessels from the Netherlands, Denmark and Norway. Based on the plankton samples and temperature observations ... -
Size of eggs and nauplii of calanoid copepods in the Barents Sea; influence of environmental and maternal factors
(ICES CM Documents;1991/L:63, Working paper, 1991)During the years 1986 to 1988 eight cruises were conducted in the central and western parts of the Barents Sea. The cruises, together spanning the time period from January to July, covered most developmental stages of ... -
Size selective effects of a plastic body on longline hooks
(ICES CM Documents;1991/B:46, Working paper, 1991)The potential for improving size selectivity of longlines by using a plastic body attached to the hook shank was tested in a fishing trial for tusk (Brosme brosme), ling (Molva molva) and haddock (Melanogrammus aeglefinus). ... -
Assessing the effect of intra-haul correlation and variable density on population estimates from marine surveys
(ICES CM Documents;1991/D:14, Working paper, 1991)In a previous paper (Pennington and Vølstad, Biometrics 47, 1991) it was suggested that reducing the size of the sampling unit generally used in marine surveys could increase the precision of abundance estimates. But if ... -
Working Group on the Assessment of the Stocks of Sardine, Horse Mackerel, Anchovy [Copenhagen, 18- 27 June, 1991]
(ICES CM Documents;1991/Assess:22, Working paper, 1991) -
SKAGEX: Some preliminary results
(ICES CM Documents;1991/C:2, Working paper, 1991)A series of synoptic hydrographic and biological investigations were carried out in the Skagerrak area in May-June and September 1990 and in January and May 1991 (Skagerrak Experiment or SKAGEX). -
Return of Norwegian spring spawning herring (Clupea harengus L.) to historical spawning grounds off southwestern Norway
(ICES CM Documents;1991/H:24, Working paper, 1991)From the mid-1940s to mid-1960s a northward displacement of the spawning areas of the Norwegian Spring Spawning Herring was observed. Further retraction of the population from traditional feeding and spawning grounds ... -
The Working Group on Methods of Fish Stock Assessment [Newfoundland, 20- 27 June, 1991]
(ICES CM Documents;1991/Assess:25, Working paper, 1991) -
Report of the Workshop on Age Determination of Redfish [Murmansk, 26- 30 August, 1991]
(ICES CM Documents;1991/G:79, Working paper, 1991) -
Avoidance reactions of ultrasonic tagged cod during bottom trawling in shallow water
(ICES CM Documents;1991/B:41, Working paper, 1991)Introduction: Observations made by echo sounder (Ona 1988) have shown that cod (Gadus morhua L.) may avoid an approaching survey vessel horizontally and vertically. However, there has been a lack of information on the ... -
A new system for automatic STD data acquisition from randomly positioned observers
(ICES CM Documents;1991/C:21, Working paper, 1991)The Inst. of Marine Researche in Bergen has since 1935 on a regulary basis acquired data from fixed hydrographic stations on the Norwegian coast. The data are collected by local residents via water samplers and reversing ... -
Effect of attractant distribution on catch rate and size selection of Norway lobster caught by pots
(ICES CM Documents;1991/B:45, Working paper, 1991)In comparative fishing trials with Norway lobster (Nephrops norvegicus) pots, the attractant property of an aqueous extract of mackerel was tested against that of natural mackerel bait. The catch rate of the natural ... -
Stock prediction using stochastic recruitment numbers with empirical stock-dependent distribution
(ICES CM Documents;1991/H:28, Working paper, 1991)Probability distributions for the recruitment, conditional on the spawning stock biomass (SSB) were made using a kernel method. Predictions were made with recruitments according to these distributions for 10 years, using ...