Browsing Brage IMR by Subject "herring"
Now showing items 121-140 of 383
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Herring larvae survey in the Skagerrak, Autumn 1966
(ICES CM Documents;1967/H:27, Working paper, 1967) -
High prevalence of viral haemorrhagic septicaemia virus (VHSV) in Norwegian spring‑spawning herring
(Journal article; Peer reviewed, 2013-03-25)Viral haemorrhagic septicaemia (VHS) is a viral disease known to cause high mortality in many teleost species, both in wild and farmed populations. The effects of this virus infection on the population dynamics of Atlantic ... -
How and why acoustic detectability and catchability of herring change with individual motivation and physiological state in a variable environment: a multi-scale study on a local herring population in southwestern Norway
(ICES CM documents, Working paper, 2006)The understanding of distribution and aggregation in herring (Clupea harengus) can be enhanced by integrated multi-scale studies in small ecosystems. Hydro-acoustics, underwater cameras, herring and predator gillnet samples ... -
How many trawl hauls, and how many fish from each haul are needed to obtain a given precision in the age structure estimate for Norwegian spring spawning herring? A bootstrap approach
(ICES CM documents, Working paper, 2006)The Norwegian spring spawning herring is assessed each year from acoustic surveys. The age structure in the stock is estimated from trawl samples. Typically, about 10 trawl samples are taken per survey, and 100 fish from ... -
ICES symposium on herring stocks 1977
(ICES CM Documents;1975/H:55, Working paper, 1975) -
ICES Working Group on the Bløden Tagging Experiment : Report on the Meeting at Charlottenlund 29 March to 2 April 1971
(ICES CM Documents;1971/H:3, Working paper, 1971) -
Ichthyophonus hoferi disease in the herring in Norwegian waters
(ICES CM Documents;1992/H:27, Working paper, 1992)After the discovery of I. hoferi disease in Norwegian spring spawning herring in summer 1991, a program for systematic surveillance of the disease in the herring in Norwegian waters was developed. The programme, which ... -
Impact of herring spawning behaviour on acoustic abundance estimates
(ICES CM documents, Working paper, 2001)Spawning dynamics of Norwegian spring spawning herring was studied in south western Norway 29 March to 3 April 2000 using hydroacoustics. The horizontal distribution of the spawning layers shifted in a south-easterly ... -
In situ swimming speed and swimming behaviour of fish feeding on the krill Meganyctiphanes norvegica
(Journal article; Peer reviewed, 2005)In situ swimming speed and swimming behaviour of dielly migrating planktivorous fish were studied at a 120-m-deep location. Acoustic target tracking was performed using a hull-mounted transducer and submersible ... -
Indirect climatic forcing of the Barents Sea capelin: a cohort effect
(Journal article; Peer reviewed, 2004-06-08)Planktivorous capelin is a key species in the Barents Sea, being of great importance in the exploitation of plankton production in this subarctic region. However, in years with a successful reproduction of the Norwegian ... -
The influence of fish behaviour on acoustic abundance estimates during the spawning season in Norwegian spring-spawning herring
(ICES CM documents, Working paper, 2001) -
Influence of sea temperature on herring distribution and migration in the Norwegian Sea in April 1997
(ICES CM Documents;1999/M:3, Working paper, 1999)After spawning at the west coast of Norway, the Norwegian spring spawning herring migrates northwestwards into the Norwegian Sea to feed in early April. The herring enters areas with distinct oceanographic features both ... -
Inter-calibration of participating vessels in the ICES coordinated surveys of North Sea herring
(ICES CM Documents;1998/OPEN:23, Working paper, 1998)Summary: Three pairwise acoustic inter-calibrations of the performance of EK500 scientific echosounders were carried out in July 1997. The first inter-calibration was carried out at about 57 40'N by OE by GO Sars and ... -
Interim report of the North Sea herring assessment working group
(ICES CM Documents;1972/H:2, Working paper, 1972) -
Investigations on the 1983 year-class of Norwegian spring-spawning herring
(ICES CM Documents;1984/H:39, Working paper, 1984) -
Jakter på kystsilda [Jostein Røttingen uttaler seg om tokt]
(Others, 2010-08-25) -
Killer whales (Orcinus orca L.) and saithe (Pollachius virens L.) trap herring (Clupea harengus L.) in shallow water by taking advantage of steep bottom topography
(ICES CM Documents;2002/N:20, Working paper, 2002)Whales and fish use a wide range of hunting tactics in order to catch their prey. Predatorprey interactions have been seen during the massive wintering of herring (Clupea harengus) in steep bottomed topography in Lofoten, ... -
Kopepodnauplier på Møre våren 1986 - næringstilbudet til sildelarver [HELP 11]
(help, Research report, 1987)Kopepodnauplier inngår som en viktig del av næringen til sildelarver. På den bakgrunn ble det våren 1986 foretatt en undersøkelse over forekomsten av nauplier i forhold til sildelarver på Møre. Kopepodnauplier og ... -
Krise for silda i Nordsjøen
(Havforskningsnytt, Working paper, 1996)