Browsing by Author "Skiftesvik, Anne Berit"
Now showing items 1-20 of 51
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A biotest system for optimalization of environmental parameters for production of halibut fry
Mangor-Jensen, Anders; Jelmert, Anders; Naas, Kjell Emil; Harboe, Torstein; Skiftesvik, Anne Berit (ICES CM Documents;1987/F:21, Working paper, 1987)A system for controlled testing of different environmental parameters in seawater was made. Both the biotest system and an experimental setup using larvae of the Atlantic Halibut (Hippoglossus hippoglossus L.) are described. -
Alder og vekst hos de ulike artene av leppefisk i utbredelsesområdet
Skiftesvik, Anne Berit; Durif, Caroline M.F.; Bjelland, Reidun M. (Rapport fra Havforskningen;Nr. 3-2013, Working paper, 2013-01)De ulike leppefiskartene har forskjellige livshistorier. Bergnebb vokser seint, men ganske jevnt gjennom livet. De vil ha en alder på 4-5 år før de når fangbar størrelse på 11 cm som var instestørrelsen i 2012. Grønngylt ... -
Artsfordeling og bestandsstørrelser for de ulike artene av leppefisk i de undersøkte områdene
Skiftesvik, Anne Berit; Durif, Caroline M.F.; Bjelland, Reidun M.; Browman, Howard I. (Rapport fra Havforskningen;Nr. 15 - 2012, Working paper, 2012-04)Sammensetningen av leppefiskarter er signifikant forskjellige mellom alle lokalitetene som ble undersøkt, også mellom lokaliteter som ligger nær hverandre. De dominerende artene var grønngylt og bergnebb alle steder foruten ... -
A comparison of egg quality and larval viability between cultured coastal cod and wild arcto-norwegian cod
Solemdal, Per; Kjesbu, Olav Sigurd; Opstad, Ingegjerd; Skiftesvik, Anne Berit; Birkeland, R.; Bratland, Per; Fonn, Merete (ICES CM documents;1991/F:41;, Working paper, 1991)Experiments on cod eggs revealed an inverse relationship between egg diameter and mortality. Further, larvae hatching from small eggs showed a redeuced feeding ability. Other methods to characterice larval viability ... -
Domestisering av marine arter
Jørstad, Knut Eirik; Otterå, Håkon; Nilsen, Frank; Norberg, Birgitta; Dahle, Geir; Karlsen, Ørjan; Skiftesvik, Anne Berit (Research report, 2002) -
Early ontogeny of the Atlantic halibut Hippoglossus hippoglossus head
Cloutier, R.; de Souza, J. Lambrey; Browman, Howard I.; Skiftesvik, Anne Berit (Journal article; Peer reviewed, 2011-04-04)An ontogenetic sequence of Atlantic halibut Hippoglossus hippoglossus larvae, reared in intensive culture conditions, was cleared and stained and histologically processed to determine normal cranial chondrification for ... -
Early ontogeny of the Atlantic halibut Hippoglossus hippoglossus head
Cloutier, R.; de Souza, J. Lambrey; Browman, Howard I.; Skiftesvik, Anne Berit (Journal article; Peer reviewed, 2011-04-04)An ontogenetic sequence of Atlantic halibut Hippoglossus hippoglossus larvae, reared in intensive culture conditions, was cleared and stained and histologically processed to determine normal cranial chondrification for ... -
Effect of Sub-Lethal Exposure to Ultraviolet Radiation on the Escape Performance of Atlantic Cod Larvae (Gadus morhua)
Fukunishi, Yuichi; Browman, Howard I.; Durif, Caroline M.F.; Bjelland, Reidun M.; Skiftesvik, Anne Berit (Journal article; Peer reviewed, 2012-04-19)The amount of ultraviolet (UV) radiation reaching the earth’s surface has increased due to depletion of the ozone layer. Several studies have reported that UV radiation reduces survival of fish larvae. However, indirect ... -
Effect of turbulence on the energetics of foraging in Atlantic cod Gadus morhua larvae
Galbraith, Peter S.; Browman, Howard I.; Racca, Roberto G.; Skiftesvik, Anne Berit; Saint-Pierre, Jean-François (Journal article; Peer reviewed, 2004-11-01)A net energy gain (NEG) model was used to assess the effects of turbulence on the energy budget of Atlantic cod Gadus morhua larvae, feeding on copepod nauplii at different concentrations. The geometry of their prey search ... -
Effects of light on the development, activity and mortality of halibut (Hippoglossus hippoglossus L.) yolk sac larvae
Skiftesvik, Anne Berit; Opstad, Ingegjerd; Bergh, Øivind; Pittman, Karin; Skjolddal, Lillian (ICES CM Documents;1990/F:43, Working paper, 1990)Halibut yolk sac larvae were kept at different light intensities from Day 1 posthatch. Measurements of activity and swimming speed showed that larvae that were kept in darkness were more active, but had lower swimming ... -
Effects of turbulence on the predation cycle of fish larvae: comments on some of the issues
Browman, Howard I.; Skiftesvik, Anne Berit (Journal article; Peer reviewed, 1996-08-29) -
Effects of UV Radiation and Diet on Polyunsaturated Fatty Acids in the Skin, Ocular Tissue and Dorsal Muscle of Atlantic Salmon (Salmo salar) Held in Outdoor Rearing Tanks
Arts, Michael T.; Browman, Howard I.; Jokinen, Ilmari E.; Skiftesvik, Anne Berit (Journal article; Peer reviewed, 2010-07)The effect of UV radiation (UVR) on juvenile Atlantic salmon (Salmo salar) was assessed by measuring the fatty acid (FA) profiles of muscle, dorsal and ventral skin, and ocular tissues following 4-month long exposures to ... -
Experimental infection of turbot Scophthalmus maximus and halibut Hippoglossus hippoglossus yolk sac larvae with Aeromonas salmonicida subsp. salmonicida
Bergh, Øivind; Hjeltnes, Brit K.; Skiftesvik, Anne Berit (Journal article; Peer reviewed, 1997-04-24)The susceptibility of early life stages of turbot Scophthalmus maximus and halibut Hippoglossus hippoglossus to Aeromonas salmonicida subsp. salmonicida was studied in challenge experiments. Eggs of both fish species (and ... -
Fangst og bruk av leppefisk - innenfor bærekraftige rammer?
Mortensen, Stein H.; Skiftesvik, Anne Berit (Havforskningsnytt;Nr. 6 - 2011, Working paper, 2011)Bruk av leppfisk regnes som den eneste metoden for bekjempelse av lakselus som ikke har negative konsekvenser for miljøet. Bruken har økt kraftig de siste årene – i takt med problemene med lakselus. At lakselus enkelte steder ... -
Forskningsfangst etter ål (2017), sluttrapport
Durif, Caroline; Skiftesvik, Anne Berit (Rapport fra havforskningen;19-2018, Research report, 2018) -
Forsøksfiske for selektiv fangst av berggylt
Halvorsen, Kim Tallaksen; Bjelland, Reidun; Jørgensen, Terje; Skiftesvik, Anne Berit (Rapport fra Havforskningen;8-2017, Working paper, 2017)Wild-caught wrasse is used as cleaner fish to reduce sea lice infestations in salmonid aquaculture in Norway. Wrasses are protected during the spawning period (May-July), but salmon farmers and fishermen have requested to ... -
Glass eels (Anguilla anguilla) have a magnetic compass linked to the tidal cycle
Cresci, Alessandro; Paris, Claire B.; Durif, Caroline; Shema, Steven; Bjelland, Reidun Marie; Skiftesvik, Anne Berit; Browman, Howard (Journal article; Peer reviewed, 2017)The European eel (Anguilla anguilla) has one of the longest migrations in the animal kingdom. It crosses the Atlantic Ocean twice during its life history, migrating between the spawning area in the Sargasso Sea and Europe, ... -
Grazing Rates of Calanus finmarchicus on Thalassiosira weissflogii Cultured under Different Levels of Ultraviolet Radiation
Fields, David M.; Durif, Caroline M.F.; Bjelland, Reidun M.; Shema, Steven D.; Skiftesvik, Anne Berit; Browman, Howard I. (Journal article; Peer reviewed, 2011-10-18)UVB alters photosynthetic rate, fatty acid profiles and morphological characteristics of phytoplankton. Copepods, important grazers of primary production, select algal cells based upon their size, morphological traits, ... -
Kan atferdsendringer brukes til å røkte ut syke kveitelarver?
Skiftesvik, Anne Berit; Bergh, Øivind (Havforskningsnytt, Working paper, 1993) -
Kriterier for vurdering av truete naturtyper
Framstad, Erik; Stabbetorp, Odd Egil; Skiftesvik, Anne Berit; Brandrud, Tor Erik (Research report, 2009)For å få fram et bedre kunnskapsgrunnlag for forvaltningen av norsk natur skal det utarbeides en oversikt over Norges truete naturtyper, basert på arbeidet med en ny naturtypeinndeling for Norge (NiN). Med naturtype forstås ...