Blar i ICES CM documents authored by IMR scientists (1949-2011) på tittel
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The distribution and abundance of harbour porpoises and other small cetaceans in the North Sea and adjacent waters
(ICES CM Documents;1995/N:10, Working paper, 1995)To provide accurate and precise estimates of abundance for harbour porpoises and other small cetaceans throughout the North Sea and adjacent waters, an intensive shipboard and aerial sightings survey was conducted in ... -
The ecosystem approach to fisheries – science driven or issue driven?
(ICES CM documents;2007/R:08, Working paper, 2007)The ecosystem approach to fisheries (EAF) represents a multi-objective aiming at 1) broadening the management perspectives from single species to including ecosystems considerations, 2) maintaining a precautionary approach ... -
The effect of a short time exposure to different temperature and salinity regimes on survival of maturing Atlantic salmon and eyed eggs, and changes in blood and seminal plasma during the spawning period
(ICES CM Documents;1986/F:25, Working paper, 1986)Maturing Atlantic salmon, transferred from brackish water two weeks prespawning, were held under four different temperature and salinity regimes through their spawning period. Values of blood glucose and haematocrit ... -
The effect of ambient salinity on the buoyancy of eggs from the Atlantic halibut (Hippoglossus hippoglossus)
(ICES CM Documents;1986/F:52, Working paper, 1986)The effect of ambient salinity on buoyancy and the formation of perivitelline fluid in eggs from the Atlantic halibut Hippoglossus hippoglossus have been investigated. The results clearly demonstrate that the water ... -
The effect of carotenoids on the development of roe and on growth rate of Atlantic salmon fry
(ICES CM Documents;1982/M:12, Working paper, 1982) -
The effect of different photoperiods on growth and smoltification in Atlantic salmon (Salmo salar)
(ICES CM Documents;1985/F:32, Working paper, 1985)Photoperiod has been implicated as an effective mediator of growth and smelting in Atlantic salmon (Salmo salar). To investigate this 0+ parr of Atlantic salmon were treated with three different photoperiods: 24Light:0Dark; ... -
The effect of different sweep lengths on length composition of bottom sampling trawl catches
(ICES CM Documents;1987/B:16, Working paper, 1987)Abundance estimates of North-east Arctic cod and haddock are given annually on the basis of combined bottom trawl and acoustic surveys. Both survey methods use data from bottom trawl catches in the calculations. The ... -
The Effect of Gangion Floats on Bait-loss and Catch Rates in Longlining
(ICES CM Documents;1984/B:8, Working paper, 1984)The use of gangion floats will expectedly reduces bait loss and increase catch rates in bottom longlining. Two floats of 5- and 8 g buoyancy are tested through flume tank experiments, underwater observations in the field ... -
The effect of illumination on alevins of Atlantic salmon (Salmo salar) and rainbow trout (S. gairdneri), incubated on different substrates
(ICES CM Documents;1985/F:27, Working paper, 1985)Atlantic salmon (Salmo salar) and rainbow trout (S. gairdneri) eggs were incubated in plexi-glass aquariums. After hatching, alevins were kept in darkness, two groups of each species without substrate, two groups in ... -
The effect of shading in pen rearing of Atlantic salmon (Salmo salar)
(ICES CM Documents;1988/F:18, Working paper, 1988)A full scale pen rearing experiment with covers to reduce illumination was carried out. No significant effects were observed on growth, mortality, ectoparasite infection, maturation or net pen fouling. -
The effective swept volume of a bottom trawl
(ICES CM Documents;2004/R:7, Working paper, 2004)The reaction of individual fish towards an approaching trawling vessel has previously been measured using target-tracking methods. In this paper these measured velocities are fitted to a deterministic mean behaviour ... -
The effects of light on the mortality of different pigmented atlantic salmon (Salmo salar) eggs.
(ICES CM Documents;1981/M:16, Working paper, 1981) -
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 ... -
The effects of oil-base drilling mud and crude oil on demersal fish eggs
(ICES CM Documents;1988/E:19, Working paper, 1988)The Norwegian spring spawning herring and the Barents Sea capelin both with demersal eggs, spawn in relative small and concentrated areas on the Norwegian continental shelf. Besides potential impact on the fish resources ... -
The effects of the 1983 herring year-class on the 1983 capelin year-class
(ICES CM Documents;1988/H:53, Working paper, 1988) -
The egg production and spawning stock size of the North Sea mackerel and horse mackerel stocks in 1988
(ICES CM Documents;1989/H:16, Working paper, 1989)During the period 5 April to 28 July 1988 the spawning areas of North Sea mackerel and horse mackerel were investigated by research vessels from the Netherlands, Denmark and Norway. Based on the plankton samples ... -
The egg production and spawning stock size of the North Sea mackerel stock in 1984
(ICES CM Documents;1985/H:38, Working paper, 1985)During the period 22 May to 17 July the spawning area of North Sea mackerel was investigated by research vessels from Scotland, the Netherlands, Denmark and Norway. Based on the 629 plankton samples and temperature ... -
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 ... -
The equivalent beam angle and its effective value when applying an integrator threshold
(ICES CM Documents;1987/B:35, Working paper, 1987)In a noise-limited echo integration system, a threshold is applied in order to avoid the contribution from noise. As the signal-to-noise ratio decreases with range, the effective observation volume for small targets is ...