Browsing ICES CM documents authored by IMR scientists (1949-2011) by Author "Bergh, Øivind"
Now showing items 1-9 of 9
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Antibacterial treatment procedures of eggs of halibut (Hippoglossus hippoglossus L.)
Bergh, Øivind; Jelmert, Anders (ICES CM Documents;1990/F:39, Working paper, 1990)Halibut eggs were surface disinfected with a iodophor one day before hatching, and mortality and larval development was recorded until the time of first feeding. The groups exposed to higher concentrations of disinfectant ... -
Bacterial diseases of eggs and yolk sac larvae of halibut (Hippoglossus hippoglossus L.): Characterization and experimental infection
Bergh, Øivind; Hansen, Geir Høvik; Jelmert, Anders (ICES CM Documents;1990/F:38, Working paper, 1990)Scanning electron micrographs of halibut eggs which were shown to have an epiflora dominated by a Flexibacter sp., revealed wounds colonized by large amounts of bacteria. The chorion was penetrated in most wounds, and ... -
Effects of continuous flow rate on development and mortality of halibut yolk sac larvae
Opstad, Ingegjerd; Bergh, Øivind (ICES CM Documents;1990/F:41, Working paper, 1990)Halibut (Hippoglossus hippoglossus L.) yolk sac larvae were raised in incubators with different rates of continuous flow. Most larvae died between Days 10 and 29 after hatching. Rate of mortality increased with increasing ... -
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 ... -
Green water in larviculture - An experiment with natural phytoplankton in tanks for first feeding of halibut larvae (Hippoglossus hippoglossus L.)
Næss, Tore Håkon; Bergh, Øivind; Harboe, Torstein; Naas, Kjell Emil; Rabben, Håvard; Skjolddal, Lillian (ICES CM Documents;1990/F:61, Working paper, 1990)At 232 day degrees, halibut larvae were transferred from indoor tanks to 1.7 m^3 outdoor tanks for first feeding. The number in each tank was approximately 750. Three tanks were continuously given algal suspension ("green ... -
Preliminary report on the effects of temperature on the development of eggs and larvae of halibut (Hippoglossus hippoglossus) and on the bacterial population in the incubators
Bergh, Øivind; Opstad, Ingegjerd; Pittman, Karin; Skiftesvik, Anne Berit; Skjolddal, Lillian; Strand, Hans Kristian; Vanthuyne, Virginie (ICES CM Documents;1989/F:19, Working paper, 1989)Eggs were stripped from one female of the halibut broodstock at Austevoll Aquaculture Station, and fertilised with sperm from two males immediately before incubation. Eggs were held in nine open-circulation 250 l incubators ... -
Size of spawning Arcto-Norwegian cod (Gadus morhua L.) and the effects on their eggs and early larvae
Solemdal, Per; Bergh, Øivind; Dahle, Geir; Falk-Petersen, Inger-Britt; Fyhn, Hans Jørgen; Grahl-Nielsen, Otto; Haaland, J.M.; Kjesbu, Olav Sigurd; Løken, Sissel; Opstad, Ingegjerd; Pedersen, Torstein; Skiftesvik, Anne Berit; Thorsen, Anders (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. ... -
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
Solemdal, Per; Bergh, Øivind; Finn, Roderick Nigel; Fyhn, Hans Jørgen; Grahl-Nielsen, Otto; Homme, O.; Kjesbu, Olav Sigurd; Kjørsvik, Elin; Opstad, Ingegjerd; Skiftesvik, Anne Berit (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 ... -
Viral haemorrhagic septicaemia in Norway—possible interactions between farmed and wild fish
Sandlund, Nina; Johansen, Renate; Bergh, Øivind (ICES CM documents;2010/J:09, Working paper, 2010)