Blar i ICES CM documents authored by IMR scientists (1949-2011) på emneord "herring"
Viser treff 101-120 av 269
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Migrations and stock size of herring in the northern North Sea in 1966; analyses of Norwegian tagging experiments
(ICES CM Documents;1972/H:29, Working paper, 1972)8000 herring were tagged with internal steel tags in the summer of 1966; 4000 were released in the north-eastern North Sea and 4000 east of Shetland. On the basis of returned tags during the first year after tagging, ... -
Modelling herring target strength pressure dependence in the frequency domain
(ICES CM documents, Working paper, 2001)Improved understanding of the acoustic scattering properties of the fish is needed when trying to remove potential bias is acoustic abundance estimates. The paper address the problem of systematic pressure or depth dependency ... -
Mortality of herring during the larval stage
(ICES CM Documents;1968/Sy:4, Working paper, 1968) -
Mortality of North Sea herring that is crowded and subsequently slipped from a purse seine
(ICES CM documents;2009/M:16, Working paper, 2009)Catch regulation by slipping whole or parts of the catch has traditionally been used in NE-Atlantic purse seine fisheries for pelagic species if the catches are considered too big or the quality or size of the fish is ... -
Norwegian herring tagging experiments in the Northern North Sea, 1966
(ICES CM Documents;1967/H:26, Working paper, 1967) -
Norwegian investigations in 1984 -1985 on juvenile herring
(ICES CM Documents;1985/H:53, Working paper, 1985)This paper describes tlte Norwegian investigations on juvenile herring (0-, I- and II-group) of the Norwegian spring spawning stock. The investigations were carried out in Norwegian coastal areas and in the Barents Sea ... -
Norwegian tagging experiments in the north-eastern North Sea and Skagerak, 1964 and 1965
(ICES CM Documents;1966/H:27, Working paper, 1966) -
Numerical domination and herring migrations
(ICES CM documents, Working paper, 2006)There is accumulating evidence in favour of the hypothesis that herring migrations are influenced by social learning. The “adopted-migrant hypothesis” postulates that recruit spawning herring learn migration patterns by ... -
Observing behaviour of over-wintering Herring (Clupea harrengus L.) in Ofoten with Acoustic Current profiler
(ICES CM Documents;2003/Q:6, Working paper, 2003)In this paper we present results and interpretation of velocity and signal strength data collected with a ‘Continental’ Current Profiler on over-wintering herring in the Ofoten in the North of Norway. The instrument was ... -
On acoustic multi-frequency species identification and separation of Atlantic mackerel, Norwegian spring spawn herring and Norway pout.
(ICES CM documents, Working paper, 2004)The accuracy of the multi-frequency species identification and separation algorithms may be significantly improved when the detailed acoustic scattering characteristics of the fish are known, including its expected variability ... -
On the herring larvae of Norwegian spring spawners : Effect of time and location of spawning on year-class strength in the period 1959-1965
(ICES CM Documents;1968/Sy:6, Working paper, 1968) -
On the shape, size and density of North Sea herring schools as mapped by echo integration and accurate sonar projection
(ICES CM Documents;1993/B:16, Working paper, 1993)The shape and horizontal extent of herring schools in the North Sea have been mapped by a naval sonar (SIMRAD SA 950) with narrow horizontal beam width. The density of schools that were passed over was measured by the ... -
Predation on the eggs of Norwegian spring-spawning herring at a spawning ground outside the westcoast of Norway in 1981
(ICES CM Documents;1985/H:55, Working paper, 1985)Predation on the eggs of demersal spawners has been reported several times, and findings of haddock feeding on capelin or herring eggs is a well known phenomenon. A spawning ground where spawning has been detected through ... -
Preliminary report of the assessment group on North Sea herring
(ICES CM Documents;1969/H:4, Working paper, 1969) -
Preliminary report of the ICES working group on the Bløden tagging experiment : Charlottenlund, 27 June - 3 July
(ICES CM Documents;1973/H:10, Working paper, 1973) -
A preliminary report on electrophoretic studies on herring serum proteins
(ICES CM Documents;1966/H:24, Working paper, 1966)Sera from more than 1 000 specimens of herring from the Norwegian Coast and the North Sea have been analyzed in combined starch-/agar-gel electrophoresis at pH 9.0. Great variations in the serum protein patterns were ... -
A preliminary report on studies of esterase phenotypes in herring
(ICES CM Documents;1967/H:24, Working paper, 1967) -
A preliminary report on the ICES-coordinated acoustic survey of herring stocks in 1979.
(ICES CM Documents;1979/H:44, Working paper, 1979)At the 1978 statutory meeting, the Council adopted a resolution put forward by the Pelagic fish committee VIa in 1979. The guidelines for the survey were set out in the report of the Herring assessment working group (CM ... -
Prey-specific gastric evacuation of Norwegian spring spawning herring (Clupea harengus)
(ICES CM Documents;2004/P:39, Working paper, 2004)Gastric evacuation rates have earlier mainly been measured based on laboratory experiments. The aim of this study is to obtain information of gastric evacuation rates when the herring are feeding in their natural environment. ... -
Reactions of herring to trawling noise
(ICES CM Documents;1988/B:36, Working paper, 1988)The reaction of herring during pelagic trawl sampling has been studied by use of a high-frequency scanning sonar mounted on the headline of the trawl. The difficulties of obtaining high catch rates on shallow herring ...