Browsing Brage IMR by Subject "VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923"
Now showing items 641-660 of 753
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Salmon lice infection on wild salmonids in marine protected areas: an evaluation of the Norwegian ‘National Salmon Fjords
(Journal article; Peer reviewed, 2014-02-05)In Norway, 29 fjords and 52 rivers have been designated for protection in order to prevent the infection of important populations of wild salmonids with salmon lice of farm origin. We evaluated the effect of this protection ... -
Salmon lice – impact on wild salmonids and salmon aquaculture
(Journal article; Peer reviewed, 2013-01-13)Salmon lice, Lepeophtheirus salmonis, are naturally occurring parasites of salmon in sea water. Intensive salmon farming provides better conditions for parasite growth and transmission compared with natural conditions, ... -
Sampling Atlantic salmon in the NE Atlantic during summer: methods of capture and distribution of catches
(ICES CM Documents;1996/M:12, Working paper, 1996)In July/ August 1991 the Institute of Marine Research (IMR, Norway) performed a pairtrawling (two boat trawl) experiment with a surface trawl to catch young herring in the northem Norwegian Sea. 34 postsmolts and two 1- ... -
Sampling herring in the Norwegian Sea by pelagic trawl
(ICES CM Documents;1997/W:21, Working paper, 1997)When the stock of Norwegian spring-spawning herring is distributed in the Norwegian Sea in summertime, pelagic trawl sampling may be rather challenging because of substantial variation in vertical distribution (from ... -
Sarcotretes scopeli, a lernaeid copepod new to Norway
(Journal article; Peer reviewed, 1971-09-10)Sarcotretes scopeli, parasitic on Benthosema glaciale, is recorded for the first time in Norway. 3.6% of the catch from the Bergen area and 1.9% from Sognefjorden was infested. The parasite seems to retard the growth and ... -
Scale damage and survival of cod and haddock escaping from a demersal trawl
(ICES CM Documents;1991/B:44, Working paper, 1991)Cod (Gadus morhua L.) and haddock (Melanogrammus aeglefinus L.) escaping through the meshes of a cod-end (135 mm diamond meshes) or through a metal grid sorting device mounted in the foremost part of the cod-end, were ... -
Schooling-by-size in the Barents Sea capelin stock
(ICES CM Documents;1990/D:28, Working paper, 1990)This paper analyses the biological samples of capelin taken by the Institute of Marine Research, Bergen, on annual stock assesment surveys in the Barents Sea from 1972 to 1989. The dependency between mean length of ... -
Screening for Viral Hemorrhagic Septicemia Virus in Marine Fish along the Norwegian Coastal Line
(Journal article; Peer reviewed, 2014-09-23)Viral hemorrhagic septicemia virus (VHSV) infects a wide range of marine fish species. To study the occurrence of VHSV in wild marine fish populations in Norwegian coastal waters and fjord systems a total of 1927 fish from ... -
SeaLice Conference 2012
(Fisken og havet;6-2012, Research report, 2012) -
Seasonal variation of the diet of cod (Gadus morhua L.) and haddock (Melanogrammus aeglefinus L.) at a herring spawning ground
(ICES CM Documents;1992/G:9, Working paper, 1992)The paper describes diet variation of cod and haddock at a spawning ground of the Norwegian Spring Spawning Herring. Samples were collected at bimonthly intervals through a one-year period, including during and following the ... -
Serology of cod in Norwegian waters : Interim report on technique
(ICES CM Documents;1962/38, Working paper, 1962) -
Sexual maturation: Effect on protease activities and carotenoid levels in Atlantic salmon (Salmo salar)
(ICES CM Documents;1984/F:24, Working paper, 1984)Protease activities in the digestive tract and carotenoid levels in flesh, ovaries and plasma were determined in 4 to 4 1/2 year old Atlantic salmon (Salmo salar) during the period from early March until December. The ... -
Significance of population genetics on management of herring stocks.
(ICES CM Documents;1981/H:64, Working paper, 1981) -
Significance of population genetics on management of herring stocks.
(ICES CM Documents;1981/H:64, Working paper, 1981) -
Simulating spreading of salmon lice with Ladim. How long simulations are necessary for a ‘representative’ spreading
(Rapport fra Havforskningen;Nr. 31-2013, Working paper, 2013) -
Size of spawning Arcto-Norwegian cod (Gadus morhua L.) and the effects on their eggs and early larvae
(ICES CM Documents;1993/G:41, Working paper, 1993)Using a new method for determining the stage of spawning in batch spawners, a positive correlation between the length of Arcto-Norwegian cod females, having spawned 25-75% of their eggs, and the egg diameter was established. ... -
Size structure, age-size dynamics and life history variation
(ICES CM documents;2008/F:13, Working paper, 2008)Here we present a new technique to study life history variation when only length distributions of populations are known. Shape of length distribution in a population is to a significant extent determined by the degree ... -
Slakting av oppdrettsfisk. Svar på spørsmål fra Mattilsynet knyttet til fiskevelferd i slakteprosessen
(Rapport fra Havforskningen;Nr. 15-2013, Working paper, 2013) -
Sluttrapport til Mattilsynet over lakselusinfeksjonen på vill laksefisk langs norskekysten i 2011
(Rapport fra Havforskningen;Nr. 19-2011, Working paper, 2011-12) -
Smitte mellom oppdrettsfisk og villfisk - hva vet vi?
(Research report, 2011)